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Entry version 184 (07 Apr 2021)
Sequence version 2 (03 Oct 2006)
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Protein

Transcriptional activator HAC1

Gene

HAC1

Organism
Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
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 activator involved in the unfolded protein response (UPR) pathway. Recognizes and binds to the UPR element (UPRE) in the promoter of UPR-regulated genes such as KAR2, PDI1, EUG1 and FKB2. Increases the synthesis of endoplasmic reticulum-resident proteins required for protein folding as well as components of the secretory pathway.

Miscellaneous

Present with 8970 molecules/cell in log phase SD medium.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

GO - Biological processi

<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

Molecular functionActivator, DNA-binding
Biological processTranscription, Transcription regulation, Unfolded protein response

<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:
Transcriptional activator HAC1
<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:HAC1
Synonyms:ERN4, IRE15, IRE2
Ordered Locus Names:YFL031W
<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>OrganismiSaccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
<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 identifieri559292 [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 lineageiEukaryotaFungiDikaryaAscomycotaSaccharomycotinaSaccharomycetesSaccharomycetalesSaccharomycetaceaeSaccharomyces
<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
  • UP000002311 <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 VI

Organism-specific databases

Saccharomyces Genome Database

More...
SGDi
S000001863, HAC1

Eukaryotic Pathogen, Vector and Host Database Resources

More...
VEuPathDBi
FungiDB:YFL031W

<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

Nucleus

<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_00000765181 – 238Transcriptional activator HAC1Add BLAST238

Proteomic databases

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

More...
PaxDbi
P41546

PRoteomics IDEntifications database

More...
PRIDEi
P41546

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
P41546

<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 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

By the unfolded protein response pathway. Accumulation of unfolded proteins in the ER leads to activation of IRE1, which initiates splicing of the untranslated HAC1 precursor mRNA to produce the mature form.2 Publications

<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.

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...
BioGRIDi
31115, 418 interactors

Database of interacting proteins

More...
DIPi
DIP-2203N

Protein interaction database and analysis system

More...
IntActi
P41546, 3 interactors

STRING: functional protein association networks

More...
STRINGi
4932.YFL031W

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

More...
RNActi
P41546, protein

<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>Domaini39 – 102bZIPAdd BLAST64

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>Regioni41 – 61Basic motifBy similarityAdd BLAST21
Regioni67 – 74Leucine-zipperBy similarity8

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the bZIP family.Curated

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG502S526, Eukaryota

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_075866_0_0_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P41546

Identification of Orthologs from Complete Genome Data

More...
OMAi
CTMEPAT

Family and domain databases

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR004827, bZIP
IPR044280, Hac1/HY5

The PANTHER Classification System

More...
PANTHERi
PTHR46714, PTHR46714, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF07716, bZIP_2, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00036, BZIP_BASIC, 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 (2)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 2 <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. This section is only present in reviewed entries, i.e. in UniProtKB/Swiss-Prot.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoformsi produced by alternative splicing. AlignAdd to basket
Note: Splicing occurs by a non-spliceosomal, regulated splicing mechanism. When UPR is induced, the mRNA is cleaved by bifunctional transmembrane kinase/endoribonuclease IRE1 and the exons are joined by tRNA ligase TRL1.
Isoform I (identifier: P41546-2) [UniParc]FASTAAdd to basket
Also known as: Induced

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
MEMTDFELTS NSQSNLAIPT NFKSTLPPRK RAKTKEEKEQ RRIERILRNR
60 70 80 90 100
RAAHQSREKK RLHLQYLERK CSLLENLLNS VNLEKLADHE DALTCSHDAF
110 120 130 140 150
VASLDEYRDF QSTRGASLDT RASSHSSSDT FTPSPLNCTM EPATLSPKSM
160 170 180 190 200
RDSASDQETS WELQMFKTEN VPESTTLPAV DNNNLFDAVA SPLADPLCDD
210 220 230
IAGNSLPFDN SIDLDNWRNP EAQSGLNSFE LNDFFITS
Note: Induced and active isoform.
Length:238
Mass (Da):26,905
Last modified:October 3, 2006 - 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:i81C01ACB3E2531B1
GO
Isoform U (identifier: P41546-1) [UniParc]FASTAAdd to basket
Also known as: Uninduced

The sequence of this isoform differs from the canonical sequence as follows:
     221-238: EAQSGLNSFELNDFFITS → AVITMTRKLQ

Note: Not translated. The unspliced HAC1 mRNA is stable, located in the cytoplasm, and is associated with polyribosomes, yet does not produce protein. Translational attenuation is due to basepairing of the intron with the 5'-UTR of the mRNA.Curated
Show »
Length:230
Mass (Da):26,046
Checksum:iD6CFD739C133AB4B
GO

<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 BAA05513 differs from that shown. Reason: Frameshift.Curated

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti181D → Y in BAA05513 (PubMed:7816617).Curated1

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_020905221 – 238EAQSG…FFITS → AVITMTRKLQ in isoform U. CuratedAdd BLAST18

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

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EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
D26506 Genomic DNA Translation: BAA05513.1 Frameshift.
D50617 Genomic DNA Translation: BAA24425.1
D86413 Genomic DNA Translation: BAA19565.1
BK006940 Genomic DNA Translation: DAA12409.1

Protein sequence database of the Protein Information Resource

More...
PIRi
S78571

NCBI Reference Sequences

More...
RefSeqi
NP_116622.1, NM_001179935.1 [P41546-2]

Genome annotation databases

Ensembl fungal genome annotation project

More...
EnsemblFungii
YFL031W_mRNA; YFL031W; YFL031W [P41546-2]

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
850513

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
sce:YFL031W

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
D26506 Genomic DNA Translation: BAA05513.1 Frameshift.
D50617 Genomic DNA Translation: BAA24425.1
D86413 Genomic DNA Translation: BAA19565.1
BK006940 Genomic DNA Translation: DAA12409.1
PIRiS78571
RefSeqiNP_116622.1, NM_001179935.1 [P41546-2]

3D structure databases

Database of comparative protein structure models

More...
ModBasei
Search...

SWISS-MODEL Interactive Workspace

More...
SWISS-MODEL-Workspacei
Submit a new modelling project...

Protein-protein interaction databases

BioGRIDi31115, 418 interactors
DIPiDIP-2203N
IntActiP41546, 3 interactors
STRINGi4932.YFL031W

PTM databases

iPTMnetiP41546

Proteomic databases

PaxDbiP41546
PRIDEiP41546

Genome annotation databases

EnsemblFungiiYFL031W_mRNA; YFL031W; YFL031W [P41546-2]
GeneIDi850513
KEGGisce:YFL031W

Organism-specific databases

SGDiS000001863, HAC1
VEuPathDBiFungiDB:YFL031W

Phylogenomic databases

eggNOGiENOG502S526, Eukaryota
HOGENOMiCLU_075866_0_0_1
InParanoidiP41546
OMAiCTMEPAT

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P41546
RNActiP41546, protein

Family and domain databases

InterProiView protein in InterPro
IPR004827, bZIP
IPR044280, Hac1/HY5
PANTHERiPTHR46714, PTHR46714, 1 hit
PfamiView protein in Pfam
PF07716, bZIP_2, 1 hit
PROSITEiView protein in PROSITE
PS00036, BZIP_BASIC, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

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 nameiHAC1_YEAST
<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: P41546
Secondary accession number(s): D6VTJ9, P87040
<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: November 1, 1995
Last sequence update: October 3, 2006
Last modified: April 7, 2021
This is version 184 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 programFungal Protein Annotation Program

<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

Reference proteome

Documents

  1. Yeast
    Yeast (Saccharomyces cerevisiae): entries, gene names and cross-references to SGD
  2. Yeast chromosome VI
    Yeast (Saccharomyces cerevisiae) chromosome VI: entries and gene names
  3. SIMILARITY comments
    Index of protein domains and families
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