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Entry version 134 (26 Feb. 2020)
Sequence version 3 (04 Dec. 2007)
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Protein

Calreticulin

Gene

crtA

Organism
Dictyostelium discoideum (Slime mold)
Status
Reviewed-Annotation score:

Annotation score:4 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

Molecular calcium-binding chaperone promoting folding, oligomeric assembly and quality control in the ER via the calreticulin/calnexin cycle. This lectin may interact transiently with almost all of the monoglucosylated glycoproteins that are synthesized in the ER (By similarity).By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei109CarbohydrateBy similarity1
Binding sitei111CarbohydrateBy similarity1
Binding sitei128CarbohydrateBy similarity1
Binding sitei135CarbohydrateBy similarity1
Binding sitei318CarbohydrateBy similarity1

<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 functionChaperone
LigandCalcium, Lectin, Metal-binding, Zinc

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-DDI-901042 Calnexin/calreticulin cycle

<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:
Calreticulin
<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:crtA
ORF Names:DDB_G0283539
<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>OrganismiDictyostelium discoideum (Slime mold)
<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 identifieri44689 [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 lineageiEukaryotaAmoebozoaEvoseaEumycetozoaDictyosteliaDictyostelialesDictyosteliaceaeDictyostelium
<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
  • UP000002195 <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> Componentsi: Chromosome 4, Unassembled WGS sequence

Organism-specific databases

Dictyostelium discoideum online informatics resource

More...
dictyBasei
DDB_G0283539 crtA

<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

GO - Cellular componenti

Keywords - Cellular componenti

Endoplasmic reticulum

<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 denotes the presence of an N-terminal signal peptide.<p><a href='/help/signal' target='_top'>More...</a></p>Signal peptidei1 – 19Sequence analysisAdd BLAST19
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_000000418120 – 424CalreticulinAdd BLAST405

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi105 ↔ 137By similarity

Keywords - PTMi

Disulfide bond

Proteomic databases

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

More...
PaxDbi
Q23858

PRoteomics IDEntifications database

More...
PRIDEi
Q23858

<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

GO - Molecular functioni

Protein-protein interaction databases

Protein interaction database and analysis system

More...
IntActi
Q23858, 1 interactor

STRING: functional protein association networks

More...
STRINGi
44689.DDB0191384

<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
Q23858

Database of comparative protein structure models

More...
ModBasei
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 'Family and Domains' section indicates the positions and types of repeated sequence motifs or repeated domains within the protein.<p><a href='/help/repeat' target='_top'>More...</a></p>Repeati191 – 2021-1Add BLAST12
Repeati210 – 2211-2Add BLAST12
Repeati227 – 2381-3Add BLAST12
Repeati246 – 2561-4Add BLAST11
Repeati260 – 2702-1Add BLAST11
Repeati274 – 2842-2Add BLAST11
Repeati288 – 2982-3Add BLAST11

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>Regioni191 – 2564 X 12 AA approximate repeatsAdd BLAST66
Regioni260 – 2983 X 11 AA approximate repeatsAdd BLAST39

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>Motifi421 – 424Prevents secretion from ERPROSITE-ProRule annotation4

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 amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi353 – 420Asp/Glu/Lys-richAdd BLAST68

<p>This subsection of the 'Family and domains' section provides general information on the biological role of a domain. The term 'domain' is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

Can be divided into a N-terminal globular domain, a proline-rich P-domain forming an elongated arm-like structure and a C-terminal acidic domain. The P-domain binds one molecule of calcium with high affinity, whereas the acidic C-domain binds multiple calcium ions with low affinity (By similarity).By similarity
The interaction with glycans occurs through a binding site in the globular lectin domain.By similarity
The zinc binding sites are localized to the N-domain.By similarity

<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 calreticulin family.Curated

Keywords - Domaini

Repeat, Signal

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG0674 Eukaryota
ENOG410XRR7 LUCA

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_018224_0_2_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q23858

KEGG Orthology (KO)

More...
KOi
K08057

Identification of Orthologs from Complete Genome Data

More...
OMAi
DTWIYSK

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q23858

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
2.10.250.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR001580 Calret/calnex
IPR018124 Calret/calnex_CS
IPR009169 Calreticulin
IPR009033 Calreticulin/calnexin_P_dom_sf
IPR013320 ConA-like_dom_sf

The PANTHER Classification System

More...
PANTHERi
PTHR11073 PTHR11073, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00262 Calreticulin, 2 hits

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF002356 Calreticulin, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00626 CALRETICULIN

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF49899 SSF49899, 1 hit
SSF63887 SSF63887, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00804 CALRETICULIN_2, 1 hit
PS00805 CALRETICULIN_REPEAT, 1 hit
PS00014 ER_TARGET, 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>Sequencei

<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.

<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 in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

Q23858-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MRLLLCLIFL VFVFNFALST VHFKDTFDND WESRWVVSDW HKEDGKSGKL
60 70 80 90 100
VHTAGKWFGD ENQKGIQTSE DARFYAVSAK FPSFSNKGKD LVLQYTVKNE
110 120 130 140 150
QKVDCGGSYI KLLPSKLDQS AFDGESEYSI MFGPDVCGAS KRVHVILNYK
160 170 180 190 200
GKNHLIKKEI NKVETDQLTH QYTLVISPDN TYKVLVDNKE IQAGNLADDW
210 220 230 240 250
ELLPSKQIKD PKQSKPVDWV DVKEIDDPED VKPAGHDDIP ASIVDPEAVK
260 270 280 290 300
PEDWNEEDDG EWEAPTIANP EYKGEWKAKK IPNPEYKGEW VHPLIDNPEY
310 320 330 340 350
AEDNELYLFN DLGAIGFELW QVKSGSIFNN MIVTDSVEEA KDFSEKTFVA
360 370 380 390 400
NQEAEKKMFD DLEAAKAEER KKADEKLAAE KAAEKEAEEA DEEEEEVAEE
410 420
DLVKTDDKKE EVKKSTKKVD HDEL
Length:424
Mass (Da):48,365
Last modified:December 4, 2007 - v3
<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:iEAF3D804F96E4AEC
GO

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 conflicti183K → N in AAB87719 (Ref. 1) Curated1

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
U36937 mRNA Translation: AAB87719.1
AAFI02000055 Genomic DNA Translation: EAL65647.1

NCBI Reference Sequences

More...
RefSeqi
XP_639010.1, XM_633918.1

Genome annotation databases

Ensembl protists genome annotation project

More...
EnsemblProtistsi
EAL65647; EAL65647; DDB_G0283539

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
8624140

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ddi:DDB_G0283539

<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
U36937 mRNA Translation: AAB87719.1
AAFI02000055 Genomic DNA Translation: EAL65647.1
RefSeqiXP_639010.1, XM_633918.1

3D structure databases

SMRiQ23858
ModBaseiSearch...

Protein-protein interaction databases

IntActiQ23858, 1 interactor
STRINGi44689.DDB0191384

Proteomic databases

PaxDbiQ23858
PRIDEiQ23858

Genome annotation databases

EnsemblProtistsiEAL65647; EAL65647; DDB_G0283539
GeneIDi8624140
KEGGiddi:DDB_G0283539

Organism-specific databases

dictyBaseiDDB_G0283539 crtA

Phylogenomic databases

eggNOGiKOG0674 Eukaryota
ENOG410XRR7 LUCA
HOGENOMiCLU_018224_0_2_1
InParanoidiQ23858
KOiK08057
OMAiDTWIYSK
PhylomeDBiQ23858

Enzyme and pathway databases

ReactomeiR-DDI-901042 Calnexin/calreticulin cycle

Miscellaneous databases

Protein Ontology

More...
PROi
PR:Q23858

Family and domain databases

Gene3Di2.10.250.10, 1 hit
InterProiView protein in InterPro
IPR001580 Calret/calnex
IPR018124 Calret/calnex_CS
IPR009169 Calreticulin
IPR009033 Calreticulin/calnexin_P_dom_sf
IPR013320 ConA-like_dom_sf
PANTHERiPTHR11073 PTHR11073, 1 hit
PfamiView protein in Pfam
PF00262 Calreticulin, 2 hits
PIRSFiPIRSF002356 Calreticulin, 1 hit
PRINTSiPR00626 CALRETICULIN
SUPFAMiSSF49899 SSF49899, 1 hit
SSF63887 SSF63887, 1 hit
PROSITEiView protein in PROSITE
PS00804 CALRETICULIN_2, 1 hit
PS00805 CALRETICULIN_REPEAT, 1 hit
PS00014 ER_TARGET, 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 nameiCALR_DICDI
<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: Q23858
Secondary accession number(s): Q54QX4
<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: December 15, 1998
Last sequence update: December 4, 2007
Last modified: February 26, 2020
This is version 134 of the entry and version 3 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)

<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. SIMILARITY comments
    Index of protein domains and families
  2. Dictyostelium discoideum
    Dictyostelium discoideum: entries, gene names and cross-references to dictyBase
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