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UniProtKB - O15534 (PER1_HUMAN)

Entry version 198 (02 Jun 2021)
Sequence version 2 (16 Dec 2008)
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Protein

Period circadian protein homolog 1

Gene

PER1

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Transcriptional repressor which forms a core component of the circadian clock. The circadian clock, an internal time-keeping system, regulates various physiological processes through the generation of approximately 24 hour circadian rhythms in gene expression, which are translated into rhythms in metabolism and behavior. It is derived from the Latin roots 'circa' (about) and 'diem' (day) and acts as an important regulator of a wide array of physiological functions including metabolism, sleep, body temperature, blood pressure, endocrine, immune, cardiovascular, and renal function. Consists of two major components: the central clock, residing in the suprachiasmatic nucleus (SCN) of the brain, and the peripheral clocks that are present in nearly every tissue and organ system. Both the central and peripheral clocks can be reset by environmental cues, also known as Zeitgebers (German for 'timegivers'). The predominant Zeitgeber for the central clock is light, which is sensed by retina and signals directly to the SCN. The central clock entrains the peripheral clocks through neuronal and hormonal signals, body temperature and feeding-related cues, aligning all clocks with the external light/dark cycle. Circadian rhythms allow an organism to achieve temporal homeostasis with its environment at the molecular level by regulating gene expression to create a peak of protein expression once every 24 hours to control when a particular physiological process is most active with respect to the solar day. Transcription and translation of core clock components (CLOCK, NPAS2, ARNTL/BMAL1, ARNTL2/BMAL2, PER1, PER2, PER3, CRY1 and CRY2) plays a critical role in rhythm generation, whereas delays imposed by post-translational modifications (PTMs) are important for determining the period (tau) of the rhythms (tau refers to the period of a rhythm and is the length, in time, of one complete cycle). A diurnal rhythm is synchronized with the day/night cycle, while the ultradian and infradian rhythms have a period shorter and longer than 24 hours, respectively. Disruptions in the circadian rhythms contribute to the pathology of cardiovascular diseases, cancer, metabolic syndromes and aging. A transcription/translation feedback loop (TTFL) forms the core of the molecular circadian clock mechanism. Transcription factors, CLOCK or NPAS2 and ARNTL/BMAL1 or ARNTL2/BMAL2, form the positive limb of the feedback loop, act in the form of a heterodimer and activate the transcription of core clock genes and clock-controlled genes (involved in key metabolic processes), harboring E-box elements (5'-CACGTG-3') within their promoters. The core clock genes: PER1/2/3 and CRY1/2 which are transcriptional repressors form the negative limb of the feedback loop and interact with the CLOCK|NPAS2-ARNTL/BMAL1|ARNTL2/BMAL2 heterodimer inhibiting its activity and thereby negatively regulating their own expression. This heterodimer also activates nuclear receptors NR1D1/2 and RORA/B/G, which form a second feedback loop and which activate and repress ARNTL/BMAL1 transcription, respectively. Regulates circadian target genes expression at post-transcriptional levels, but may not be required for the repression at transcriptional level. Controls PER2 protein decay. Represses CRY2 preventing its repression on CLOCK/ARNTL target genes such as FXYD5 and SCNN1A in kidney and PPARA in liver. Besides its involvement in the maintenance of the circadian clock, has an important function in the regulation of several processes. Participates in the repression of glucocorticoid receptor NR3C1/GR-induced transcriptional activity by reducing the association of NR3C1/GR to glucocorticoid response elements (GREs) by ARNTL:CLOCK. Plays a role in the modulation of the neuroinflammatory state via the regulation of inflammatory mediators release, such as CCL2 and IL6. In spinal astrocytes, negatively regulates the MAPK14/p38 and MAPK8/JNK MAPK cascades as well as the subsequent activation of NFkappaB. Coordinately regulates the expression of multiple genes that are involved in the regulation of renal sodium reabsorption. Can act as gene expression activator in a gene and tissue specific manner, in kidney enhances WNK1 and SLC12A3 expression in collaboration with CLOCK. Modulates hair follicle cycling. Represses the CLOCK-ARNTL/BMAL1 induced transcription of BHLHE40/DEC1.

1 Publication

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

Complete GO annotation on QuickGO ...

GO - Biological processi

Complete GO annotation on QuickGO ...

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Biological processBiological rhythms, Transcription, Transcription regulation

Enzyme and pathway databases

Pathway Commons web resource for biological pathway data

More...PathwayCommonsi		O15534

Reactome - a knowledgebase of biological pathways and processes

More...Reactomei		R-HSA-400253, Circadian Clock

SIGNOR Signaling Network Open Resource

More...SIGNORi		O15534

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Period circadian protein homolog 1
Short name:
hPER1
Alternative name(s):
Circadian clock protein PERIOD 1
Circadian pacemaker protein Rigui
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:PER1
Synonyms:KIAA0482, PER, RIGUI
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiHomo sapiens (Human)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri9606 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000005640 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome 17

Organism-specific databases

Human Gene Nomenclature Database

More...HGNCi		HGNC:8845, PER1

Online Mendelian Inheritance in Man (OMIM)

More...MIMi		602260, gene

neXtProt; the human protein knowledge platform

More...neXtProti		NX_O15534

Eukaryotic Pathogen, Vector and Host Database Resources

More...VEuPathDBi		HostDB:ENSG00000179094.13

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Keywords - Cellular componenti

Cytoplasm, Nucleus

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

Mutagenesis

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/manual/pathology%5Fand%5Fbiotech%5Fsection">'Pathology and Biotech'</a> section describes the effect of the experimental mutation of one or more amino acid(s) on the biological properties of the protein.<p><a href='/help/mutagen' target='_top'>More...</a></p>Mutagenesisi121 – 126TSGCSS → AAGCSA: Strongly decreases interaction with BTRC and FBXW11 and inhibits degradation promoted by CSNK1E. 6
Mutagenesisi210 – 213SEYT → AEYA: No effect on interaction with BTRC and FBXW11. 1 Publication4
Mutagenesisi714 – 726SVVSV…CSFSS → AVVAVTAQCAFAA: No effect on interaction with BTRC and FBXW11. 1 PublicationAdd BLAST13
Mutagenesisi794 – 798FLSRF → ALSRA: Strongly decreases interaction with BTRC and FBXW11. 1 Publication5

Organism-specific databases

DisGeNET

More...DisGeNETi		5187

Open Targets

More...OpenTargetsi		ENSG00000179094

The Pharmacogenetics and Pharmacogenomics Knowledge Base

More...PharmGKBi		PA33184

Miscellaneous databases

Pharos NIH Druggable Genome Knowledgebase

More...Pharosi		O15534, Tbio

Genetic variation databases

BioMuta curated single-nucleotide variation and disease association database

More...BioMutai		PER1

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001626271 – 1290Period circadian protein homolog 1Add BLAST1290

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei121Phosphothreonine; by CSNK1ESequence analysis1
Modified residuei122Phosphoserine; by CSNK1ESequence analysis1
Modified residuei126Phosphoserine; by CSNK1ESequence analysis1
Modified residuei661PhosphoserineBy similarity1
Modified residuei663PhosphoserineBy similarity1
Modified residuei704PhosphoserineCombined sources1
Modified residuei815PhosphoserineCombined sources1
Modified residuei979PhosphoserineCombined sources1
Modified residuei980PhosphoserineCombined sources1

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Phosphorylated on serine residues by CSNK1D, CSNK1E and probably also by CSNK1G2. Phosphorylation by CSNK1D or CSNK1E promotes nuclear location of PER proteins as well as ubiquitination and subsequent degradation. May be dephosphorylated by PP1.1 Publication
Ubiquitinated; requires phosphorylation by CSNK1E and interaction with BTRC and FBXW11. Deubiquitinated by USP2 (By similarity).By similarity1 Publication

Keywords - PTMi

Phosphoprotein, Ubl conjugation

Proteomic databases

Encyclopedia of Proteome Dynamics

More...EPDi		O15534

jPOST - Japan Proteome Standard Repository/Database

More...jPOSTi		O15534

MassIVE - Mass Spectrometry Interactive Virtual Environment

More...MassIVEi		O15534

PaxDb, a database of protein abundance averages across all three domains of life

More...PaxDbi		O15534

PeptideAtlas

More...PeptideAtlasi		O15534

PRoteomics IDEntifications database

More...PRIDEi		O15534

ProteomicsDB: a multi-organism proteome resource

More...ProteomicsDBi		4276
48743 [O15534-1]

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...iPTMneti		O15534

Comprehensive resource for the study of protein post-translational modifications (PTMs) in human, mouse and rat.

More...PhosphoSitePlusi		O15534

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the 'Expression' section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified 'at protein level'.<br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

Widely expressed. Expressed in hair follicles (at protein level).Found in heart, brain, placenta, lung, liver, skeletal muscle, pancreas, kidney, spleen, thymus, prostate, testis, ovary and small intestine. Highest level in skeletal muscle.4 Publications

<p>This subsection of the 'Expression' section reports the experimentally proven effects of inducers and repressors (usually chemical compounds or environmental factors) on the level of protein (or mRNA) expression (up-regulation, down-regulation, constitutive expression).<p><a href='/help/induction' target='_top'>More...</a></p>Inductioni

Serum-induced levels in fibroblasts show circadian oscillations. Maximum levels after 1 hour stimulation, minimum levels after 12 hours. Another peak is then observed after 20 hours. Protein levels show maximum levels at 6 hours, decrease to reach minimum levels at 20 hours, and increase again to reach a second peak after 26 hours. Levels then decrease slightly and then increase to maximum levels at 32 hours. Levels of phosphorylated form increase between 3 hours and 12 hours.1 Publication

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...Bgeei		ENSG00000179094, Expressed in right adrenal gland and 239 other tissues

ExpressionAtlas, Differential and Baseline Expression

More...ExpressionAtlasi		O15534, baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...Genevisiblei		O15534, HS

Organism-specific databases

Human Protein Atlas

More...HPAi		ENSG00000179094, Low tissue specificity

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction%5Fsection">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homodimer (By similarity).

Component of the circadian core oscillator, which includes the CRY proteins, CLOCK or NPAS2, ARNTL/BMAL1 or ARNTL2/BMAL2, CSNK1D and/or CSNK1E, TIMELESS, and the PER proteins (By similarity).

Interacts directly with TIMELESS, PER2, PER3, CRY1 and CRY2 (By similarity).

Interacts with ARNTL/BMAL1 and CLOCK (By similarity).

Interacts with GPRASP1 (By similarity).

Interacts (phosphorylated) with BTRC and FBXW11; the interactions trigger proteasomal degradation (PubMed:15917222).

Interacts with NONO, WDR5 and SFPQ (By similarity).

Interacts with USP2 (By similarity).

Interacts with HNF4A (PubMed:30530698).

By similarity2 Publications

<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction%5Fsection">Interaction</a>' section provides information about binary protein-protein interactions. The data presented in this section are a quality-filtered subset of binary interactions automatically derived from the <a href="https://www.ebi.ac.uk/intact/">IntAct database</a>. It is updated at every <a href="http://www.uniprot.org/help/synchronization">UniProt release</a>.<p><a href='/help/binary_interactions' target='_top'>More...</a></p>Binary interactionsi

Hide details

GO - Molecular functioni

Complete GO annotation on QuickGO ...

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...BioGRIDi		111210, 52 interactors

ComplexPortal: manually curated resource of macromolecular complexes

More...ComplexPortali		CPX-3221, Cry2-Per1 complex
CPX-3222, Cry1-Per1 complex

Database of interacting proteins

More...DIPi		DIP-56603N

Protein interaction database and analysis system

More...IntActi		O15534, 59 interactors

Molecular INTeraction database

More...MINTi		O15534

STRING: functional protein association networks

More...STRINGi		9606.ENSP00000314420

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

More...RNActi		O15534, protein

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...SMRi		O15534

Database of comparative protein structure models

More...ModBasei		Search...

Protein Data Bank in Europe - Knowledge Base

More...PDBe-KBi		Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family%5Fand%5Fdomains%5Fsection">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini208 – 275PAS 1PROSITE-ProRule annotationAdd BLAST68
Domaini348 – 414PAS 2PROSITE-ProRule annotationAdd BLAST67
Domaini422 – 465PACAdd BLAST44

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni1 – 151Interaction with BTRC1 PublicationAdd BLAST151
Regioni1 – 134DisorderedSequence analysisAdd BLAST134
Regioni508 – 544DisorderedSequence analysisAdd BLAST37
Regioni596 – 815Required for phosphorylation by CSNK1EBy similarityAdd BLAST220
Regioni646 – 698DisorderedSequence analysisAdd BLAST53
Regioni749 – 772DisorderedSequence analysisAdd BLAST24
Regioni805 – 874DisorderedSequence analysisAdd BLAST70
Regioni938 – 977DisorderedSequence analysisAdd BLAST40
Regioni996 – 1037DisorderedSequence analysisAdd BLAST42
Regioni1051 – 1098DisorderedSequence analysisAdd BLAST48
Regioni1149 – 1290CRY binding domainBy similarityAdd BLAST142
Regioni1207 – 1290DisorderedSequence analysisAdd BLAST84

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi138 – 147Nuclear export signal 1By similarity10
Motifi489 – 498Nuclear export signal 2By similarity10
Motifi827 – 843Nuclear localization signalBy similarityAdd BLAST17
Motifi982 – 989Nuclear export signal 3By similarity8
Motifi1043 – 1047LXXLL5

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes the position of regions of compositional bias within the protein and the particular type of amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi21 – 37Pro residuesSequence analysisAdd BLAST17
Compositional biasi43 – 134Polar residuesSequence analysisAdd BLAST92
Compositional biasi646 – 670Polar residuesSequence analysisAdd BLAST25
Compositional biasi751 – 769Pro residuesSequence analysisAdd BLAST19
Compositional biasi827 – 845Basic residuesSequence analysisAdd BLAST19
Compositional biasi857 – 874Pro residuesSequence analysisAdd BLAST18
Compositional biasi947 – 970Pro residuesSequence analysisAdd BLAST24

Keywords - Domaini

Repeat

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...eggNOGi		KOG3753, Eukaryota

Ensembl GeneTree

More...GeneTreei		ENSGT00940000159217

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...HOGENOMi		CLU_006667_0_0_1

InParanoid: Eukaryotic Ortholog Groups

More...InParanoidi		O15534

Identification of Orthologs from Complete Genome Data

More...OMAi		PPQHRSC

Database of Orthologous Groups

More...OrthoDBi		145617at2759

Database for complete collections of gene phylogenies

More...PhylomeDBi		O15534

TreeFam database of animal gene trees

More...TreeFami		TF318445

Family and domain databases

Conserved Domains Database

More...CDDi		cd00130, PAS, 1 hit

Integrated resource of protein families, domains and functional sites

More...InterProi		View protein in InterPro
IPR000014, PAS
IPR035965, PAS-like_dom_sf
IPR013655, PAS_fold_3
IPR022728, Period_circadian-like_C

Pfam protein domain database

More...Pfami		View protein in Pfam
PF08447, PAS_3, 1 hit
PF12114, Period_C, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...SMARTi		View protein in SMART
SM00091, PAS, 2 hits

Superfamily database of structural and functional annotation

More...SUPFAMi		SSF55785, SSF55785, 1 hit

PROSITE; a protein domain and family database

More...PROSITEi		View protein in PROSITE
PS50112, PAS, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequences (4+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

This entry describes 4 <p>This subsection of the 'Sequence' section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoformsi produced by alternative splicing. AlignAdd to basket
Note: Additional isoforms seem to exist.

This entry has 4 described isoforms and 7 potential isoforms that are computationally mapped.Show allAlign All

Isoform Rigui 4.7 (identifier: O15534-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the <div> <p><b>What is the canonical sequence?</b><p><a href='/help/canonical_and_isoforms' target='_top'>More...</a></p>canonicali sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide
        10         20         30         40         50
MSGPLEGADG GGDPRPGESF CPGGVPSPGP PQHRPCPGPS LADDTDANSN 
        60         70         80         90        100
GSSGNESNGH ESRGASQRSS HSSSSGNGKD SALLETTESS KSTNSQSPSP 
       110        120        130        140        150
PSSSIAYSLL SASSEQDNPS TSGCSSEQSA RARTQKELMT ALRELKLRLP 
       160        170        180        190        200
PERRGKGRSG TLATLQYALA CVKQVQANQE YYQQWSLEEG EPCSMDMSTY 
       210        220        230        240        250
TLEELEHITS EYTLQNQDTF SVAVSFLTGR IVYISEQAAV LLRCKRDVFR 
       260        270        280        290        300
GTRFSELLAP QDVGVFYGST APSRLPTWGT GASAGSGLRD FTQEKSVFCR 
       310        320        330        340        350
IRGGPDRDPG PRYQPFRLTP YVTKIRVSDG APAQPCCLLI AERIHSGYEA 
       360        370        380        390        400
PRIPPDKRIF TTRHTPSCLF QDVDERAAPL LGYLPQDLLG APVLLFLHPE 
       410        420        430        440        450
DRPLMLAIHK KILQLAGQPF DHSPIRFCAR NGEYVTMDTS WAGFVHPWSR 
       460        470        480        490        500
KVAFVLGRHK VRTAPLNEDV FTPPAPSPAP SLDTDIQELS EQIHRLLLQP 
       510        520        530        540        550
VHSPSPTGLC GVGAVTSPGP LHSPGSSSDS NGGDAEGPGP PAPVTFQQIC 
       560        570        580        590        600
KDVHLVKHQG QQLFIESRAR PQSRPRLPAT GTFKAKALPC QSPDPELEAG 
       610        620        630        640        650
SAPVQAPLAL VPEEAERKEA SSCSYQQINC LDSILRYLES CNLPSTTKRK 
       660        670        680        690        700
CASSSSYTTS SASDDDRQRT GPVSVGTKKD PPSAALSGEG ATPRKEPVVG 
       710        720        730        740        750
GTLSPLALAN KAESVVSVTS QCSFSSTIVH VGDKKPPESD IIMMEDLPGL 
       760        770        780        790        800
APGPAPSPAP SPTVAPDPAP DAYRPVGLTK AVLSLHTQKE EQAFLSRFRD 
       810        820        830        840        850
LGRLRGLDSS STAPSALGER GCHHGPAPPS RRHHCRSKAK RSRHHQNPRA 
       860        870        880        890        900
EAPCYVSHPS PVPPSTPWPT PPATTPFPAV VQPYPLPVFS PRGGPQPLPP 
       910        920        930        940        950
APTSVPPAAF PAPLVTPMVA LVLPNYLFPT PSSYPYGALQ TPAEGPPTPA 
       960        970        980        990       1000
SHSPSPSLPA LAPSPPHRPD SPLFNSRCSS PLQLNLLQLE ELPRAEGAAV 
      1010       1020       1030       1040       1050
AGGPGSSAGP PPPSAEAAEP EARLAEVTES SNQDALSGSS DLLELLLQED 
      1060       1070       1080       1090       1100
SRSGTGSAAS GSLGSGLGSG SGSGSHEGGS TSASITRSSQ SSHTSKYFGS 
      1110       1120       1130       1140       1150
IDSSEAEAGA ARGGAEPGDQ VIKYVLQDPI WLLMANADQR VMMTYQVPSR 
      1160       1170       1180       1190       1200
DMTSVLKQDR ERLRAMQKQQ PRFSEDQRRE LGAVHSWVRK GQLPRALDVM 
      1210       1220       1230       1240       1250
ACVDCGSSTQ DPGHPDDPLF SELDGLGLEP MEEGGGEQGS SGGGSGEGEG 
      1260       1270       1280       1290
CEEAQGGAKA SSSQDLAMEE EEEGRSSSSP ALPTAGNCTS
Length:1,290
Mass (Da):136,212
Last modified:December 16, 2008 - v2
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i60B844468EEF4D1B
GO
Isoform Rigui 3.0 (identifier: O15534-2)
Sequence is not available
Length:–
Mass (Da):–
Isoform Rigui 6.6 (identifier: O15534-3)
Also known as: Truncated
Sequence is not available
Length:–
Mass (Da):–
Isoform 2 (identifier: O15534-4) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     1-32: MSGPLEGADGGGDPRPGESFCPGGVPSPGPPQ → MLEVLEEIWSVRARRA
     822-875: CHHGPAPPSR...TPWPTPPATT → SHLGPPGACP...GTGPSLASPH
     876-1290: Missing.

Show »
Length:859
Mass (Da):91,644
Checksum:i08F94197E204DEE5
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There are 7 potential isoforms mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
J3KRL7J3KRL7_HUMAN
Period circadian protein homolog 1
PER1
1,267Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
J3QSH9J3QSH9_HUMAN
Period circadian protein homolog 1
PER1 hCG_31279
572Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
J3KSL6J3KSL6_HUMAN
Period circadian protein homolog 1
PER1
117Annotation score:

Annotation score:1 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
J3QLQ5J3QLQ5_HUMAN
Period circadian protein homolog 1
PER1
112Annotation score:

Annotation score:1 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
J3KTM2J3KTM2_HUMAN
Period circadian protein homolog 1
PER1
824Annotation score:

Annotation score:1 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
J3QL46J3QL46_HUMAN
Period circadian protein homolog 1
PER1
168Annotation score:

Annotation score:1 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
J3QL55J3QL55_HUMAN
Period circadian protein homolog 1
PER1
175Annotation score:

Annotation score:1 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>

<p>This subsection of the 'Sequence' section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

The sequence BAC06326 differs from that shown. Reason: Erroneous initiation. Extended N-terminus.Curated

Natural variant

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes natural variant(s) of the protein sequence.<p><a href='/help/variant' target='_top'>More...</a></p>Natural variantiVAR_079176422H → Q Found in a patient with Moyamoya disease; unknown pathological significance. 1 PublicationCorresponds to variant dbSNP:rs1464745710Ensembl.1
Natural variantiVAR_036038696E → Q in a breast cancer sample; somatic mutation. 1 Publication1
Natural variantiVAR_047899962A → P7 PublicationsCorresponds to variant dbSNP:rs2585405Ensembl.1
Natural variantiVAR_047900968R → H. Corresponds to variant dbSNP:rs3027193Ensembl.1
Natural variantiVAR_036039985N → S in a breast cancer sample; somatic mutation. 1 PublicationCorresponds to variant dbSNP:rs1323588262Ensembl.1
Natural variantiVAR_0360401060S → L in a colorectal cancer sample; somatic mutation. 1 PublicationCorresponds to variant dbSNP:rs761958964Ensembl.1

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes the sequence of naturally occurring alternative protein isoform(s). The changes in the amino acid sequence may be due to alternative splicing, alternative promoter usage, alternative initiation, or ribosomal frameshifting.<p><a href='/help/var_seq' target='_top'>More...</a></p>Alternative sequenceiVSP_0562051 – 32MSGPL…PGPPQ → MLEVLEEIWSVRARRA in isoform 2. 1 PublicationAdd BLAST32
Alternative sequenceiVSP_056206822 – 875CHHGP…PPATT → SHLGPPGACPLPSLGLDCWG VGLKGGVSAPGTQAGVASTT RPCLGTGPSLASPH in isoform 2. 1 PublicationAdd BLAST54
Alternative sequenceiVSP_056207876 – 1290Missing in isoform 2. 1 PublicationAdd BLAST415

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...EMBLi

GenBank nucleotide sequence database

More...GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...DDBJi
Links Updated
AF022991 mRNA Translation: AAC51765.1
AB002107 mRNA Translation: BAA22633.1
AF102137 Genomic DNA Translation: AAF15544.1
AB030817 Genomic DNA Translation: BAA94085.1
AB088477 mRNA Translation: BAC06326.2 Different initiation.
AK295410 mRNA Translation: BAG58361.1
AC129492 Genomic DNA No translation available.
CH471108 Genomic DNA Translation: EAW90090.1
CH471108 Genomic DNA Translation: EAW90091.1
BC137346 mRNA Translation: AAI37347.1

The Consensus CDS (CCDS) project

More...CCDSi		CCDS11131.1 [O15534-1]

Protein sequence database of the Protein Information Resource

More...PIRi		T00018

NCBI Reference Sequences

More...RefSeqi		NP_002607.2, NM_002616.2 [O15534-1]
XP_005256746.1, XM_005256689.1 [O15534-1]

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...Ensembli		ENST00000317276; ENSP00000314420; ENSG00000179094 [O15534-1]
ENST00000354903; ENSP00000346979; ENSG00000179094 [O15534-4]

Database of genes from NCBI RefSeq genomes

More...GeneIDi		5187

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...KEGGi		hsa:5187

UCSC genome browser

More...UCSCi		uc002gkd.4, human [O15534-1]

Keywords - Coding sequence diversityi

Alternative splicing

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF022991 mRNA Translation: AAC51765.1
AB002107 mRNA Translation: BAA22633.1
AF102137 Genomic DNA Translation: AAF15544.1
AB030817 Genomic DNA Translation: BAA94085.1
AB088477 mRNA Translation: BAC06326.2 Different initiation.
AK295410 mRNA Translation: BAG58361.1
AC129492 Genomic DNA No translation available.
CH471108 Genomic DNA Translation: EAW90090.1
CH471108 Genomic DNA Translation: EAW90091.1
BC137346 mRNA Translation: AAI37347.1
CCDSiCCDS11131.1 [O15534-1]
PIRiT00018
RefSeqiNP_002607.2, NM_002616.2 [O15534-1]
XP_005256746.1, XM_005256689.1 [O15534-1]

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...PDBei

Protein Data Bank RCSB

More...RCSB PDBi

Protein Data Bank Japan

More...PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1UL6model-A830-845[»]
SMRiO15534
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

BioGRIDi111210, 52 interactors
ComplexPortaliCPX-3221, Cry2-Per1 complex
CPX-3222, Cry1-Per1 complex
DIPiDIP-56603N
IntActiO15534, 59 interactors
MINTiO15534
STRINGi9606.ENSP00000314420

PTM databases

iPTMnetiO15534
PhosphoSitePlusiO15534

Genetic variation databases

BioMutaiPER1

Proteomic databases

EPDiO15534
jPOSTiO15534
MassIVEiO15534
PaxDbiO15534
PeptideAtlasiO15534
PRIDEiO15534
ProteomicsDBi4276
48743 [O15534-1]

Protocols and materials databases

Antibodypedia a portal for validated antibodies

More...Antibodypediai		24542, 256 antibodies

The DNASU plasmid repository

More...DNASUi		5187

Genome annotation databases

EnsembliENST00000317276; ENSP00000314420; ENSG00000179094 [O15534-1]
ENST00000354903; ENSP00000346979; ENSG00000179094 [O15534-4]
GeneIDi5187
KEGGihsa:5187
UCSCiuc002gkd.4, human [O15534-1]

Organism-specific databases

Comparative Toxicogenomics Database

More...CTDi		5187
DisGeNETi5187

GeneCards: human genes, protein and diseases

More...GeneCardsi		PER1
HGNCiHGNC:8845, PER1
HPAiENSG00000179094, Low tissue specificity
MIMi602260, gene
neXtProtiNX_O15534
OpenTargetsiENSG00000179094
PharmGKBiPA33184
VEuPathDBiHostDB:ENSG00000179094.13

Human Unidentified Gene-Encoded large proteins database

More...HUGEi		Search...

GenAtlas: human gene database

More...GenAtlasi		Search...

Phylogenomic databases

eggNOGiKOG3753, Eukaryota
GeneTreeiENSGT00940000159217
HOGENOMiCLU_006667_0_0_1
InParanoidiO15534
OMAiPPQHRSC
OrthoDBi145617at2759
PhylomeDBiO15534
TreeFamiTF318445

Enzyme and pathway databases

PathwayCommonsiO15534
ReactomeiR-HSA-400253, Circadian Clock
SIGNORiO15534

Miscellaneous databases

BioGRID ORCS database of CRISPR phenotype screens

More...BioGRID-ORCSi		5187, 4 hits in 1000 CRISPR screens

ChiTaRS: a database of human, mouse and fruit fly chimeric transcripts and RNA-sequencing data

More...ChiTaRSi		PER1, human

The Gene Wiki collection of pages on human genes and proteins

More...GeneWikii		PER1

Database of phenotypes from RNA interference screens in Drosophila and Homo sapiens

More...GenomeRNAii		5187
PharosiO15534, Tbio

Protein Ontology

More...PROi		PR:O15534
RNActiO15534, protein

The Stanford Online Universal Resource for Clones and ESTs

More...SOURCEi		Search...

Gene expression databases

BgeeiENSG00000179094, Expressed in right adrenal gland and 239 other tissues
ExpressionAtlasiO15534, baseline and differential
GenevisibleiO15534, HS

Family and domain databases

CDDicd00130, PAS, 1 hit
InterProiView protein in InterPro
IPR000014, PAS
IPR035965, PAS-like_dom_sf
IPR013655, PAS_fold_3
IPR022728, Period_circadian-like_C
PfamiView protein in Pfam
PF08447, PAS_3, 1 hit
PF12114, Period_C, 1 hit
SMARTiView protein in SMART
SM00091, PAS, 2 hits
SUPFAMiSSF55785, SSF55785, 1 hit
PROSITEiView protein in PROSITE
PS50112, PAS, 1 hit

MobiDB: a database of protein disorder and mobility annotations

More...MobiDBi		Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiPER1_HUMAN
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: O15534
Secondary accession number(s): B2RPA8, B4DI49, D3DTR3
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 15, 1999
Last sequence update: December 16, 2008
Last modified: June 2, 2021
This is version 198 of the entry and version 2 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

3D-structure, Reference proteome

Documents

  1. Human chromosome 17
    Human chromosome 17: entries, gene names and cross-references to MIM
  2. Human entries with genetic variants
    List of human entries with genetic variants
  3. Human variants curated from literature reports
    Index of human variants curated from literature reports
  4. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
  5. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
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