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Entry version 210 (07 Apr 2021)
Sequence version 3 (16 Apr 2002)
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Protein

Complement C1q subcomponent subunit C

Gene

C1QC

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

C1q associates with the proenzymes C1r and C1s to yield C1, the first component of the serum complement system. The collagen-like regions of C1q interact with the Ca2+-dependent C1r2C1s2 proenzyme complex, and efficient activation of C1 takes place on interaction of the globular heads of C1q with the Fc regions of IgG or IgM antibody present in immune complexes.

<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 - 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

Biological processComplement pathway, Immunity, Innate immunity

Enzyme and pathway databases

Pathway Commons web resource for biological pathway data

More...
PathwayCommonsi
P02747

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-HSA-166663, Initial triggering of complement
R-HSA-173623, Classical antibody-mediated complement activation
R-HSA-977606, Regulation of Complement cascade

<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:
Complement C1q subcomponent subunit C
<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:C1QC
Synonyms:C1QG
<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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
<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 1

Organism-specific databases

Human Gene Nomenclature Database

More...
HGNCi
HGNC:1245, C1QC

Online Mendelian Inheritance in Man (OMIM)

More...
MIMi
120575, gene

neXtProt; the human protein knowledge platform

More...
neXtProti
NX_P02747

Eukaryotic Pathogen, Vector and Host Database Resources

More...
VEuPathDBi
HostDB:ENSG00000159189.11

<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

Secreted

<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

<p>This subsection of the 'Pathology and Biotech' section provides information on the disease(s) associated with genetic variations in a given protein. The information is extracted from the scientific literature and diseases that are also described in the <a href="http://www.ncbi.nlm.nih.gov/sites/entrez?db=omim">OMIM</a> database are represented with a <a href="http://www.uniprot.org/diseases">controlled vocabulary</a> in the following way:<p><a href='/help/involvement_in_disease' target='_top'>More...</a></p>Involvement in diseasei

Complement component C1q deficiency (C1QD)1 Publication
The disease is caused by variants affecting the gene represented in this entry.
Disease descriptionA disorder caused by impaired activation of the complement classical pathway. It generally leads to severe immune complex disease with features of systemic lupus erythematosus and glomerulonephritis.
Related information in OMIM
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_00854234G → R in C1QD. 1 PublicationCorresponds to variant dbSNP:rs200206736EnsemblClinVar.1

Keywords - Diseasei

Disease variant

Organism-specific databases

DisGeNET

More...
DisGeNETi
714

MalaCards human disease database

More...
MalaCardsi
C1QC
MIMi613652, phenotype

Open Targets

More...
OpenTargetsi
ENSG00000159189

Orphanet; a database dedicated to information on rare diseases and orphan drugs

More...
Orphaneti
169147, Immunodeficiency due to a classical component pathway complement deficiency

The Pharmacogenetics and Pharmacogenomics Knowledge Base

More...
PharmGKBi
PA25626

Miscellaneous databases

Pharos NIH Druggable Genome Knowledgebase

More...
Pharosi
P02747, Tbio

Chemistry databases

Drug and drug target database

More...
DrugBanki
DB00112, Bevacizumab
DB00002, Cetuximab
DB09130, Copper
DB00111, Daclizumab
DB00005, Etanercept
DB00110, Palivizumab
DB01593, Zinc
DB14487, Zinc acetate
DB14533, Zinc chloride
DB14548, Zinc sulfate, unspecified form

Genetic variation databases

BioMuta curated single-nucleotide variation and disease association database

More...
BioMutai
C1QC

Domain mapping of disease mutations (DMDM)

More...
DMDMi
20178281

<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 – 281 PublicationAdd BLAST28
<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_000000352429 – 245Complement C1q subcomponent subunit CAdd BLAST217

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 bondi32Interchain
<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 residuei364-hydroxyproline1 Publication1
Modified residuei394-hydroxyproline1 Publication1
Modified residuei424-hydroxyproline1 Publication1
Modified residuei454-hydroxyproline1 Publication1
Modified residuei544-hydroxyproline1 Publication1
Modified residuei634-hydroxyproline1 Publication1
Modified residuei755-hydroxylysine1 Publication1
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi75O-linked (Gal...) hydroxylysine1
Modified residuei814-hydroxyproline1 Publication1
Modified residuei934-hydroxyproline1 Publication1
Modified residuei964-hydroxyproline1 Publication1
Modified residuei994-hydroxyproline1 Publication1
Modified residuei1054-hydroxyproline1 Publication1

<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

O-linked glycans consist of Glc-Gal disaccharides bound to the oxygen atom of post-translationally added hydroxyl groups.

Keywords - PTMi

Disulfide bond, Glycoprotein, Hydroxylation

Proteomic databases

The CPTAC Assay portal

More...
CPTACi
non-CPTAC-2652

jPOST - Japan Proteome Standard Repository/Database

More...
jPOSTi
P02747

MassIVE - Mass Spectrometry Interactive Virtual Environment

More...
MassIVEi
P02747

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

More...
PaxDbi
P02747

PeptideAtlas

More...
PeptideAtlasi
P02747

PRoteomics IDEntifications database

More...
PRIDEi
P02747

ProteomicsDB: a multi-organism proteome resource

More...
ProteomicsDBi
51563

PTM databases

GlyGen: Computational and Informatics Resources for Glycoscience

More...
GlyGeni
P02747, 1 site

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

More...
PhosphoSitePlusi
P02747

<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

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSG00000159189, Expressed in layer of synovial tissue and 207 other tissues

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
P02747, baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
P02747, HS

Organism-specific databases

Human Protein Atlas

More...
HPAi
ENSG00000159189, Tissue enhanced (lymphoid)

<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

C1 is a calcium-dependent trimolecular complex of C1q, R and S in the molar ration of 1:2:2. C1q subcomponent is composed of nine subunits, six of which are disulfide-linked dimers of the A and B chains, and three of which are disulfide-linked dimers of the C chain.

<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

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...
BioGRIDi
107175, 4 interactors

ComplexPortal: manually curated resource of macromolecular complexes

More...
ComplexPortali
CPX-1919, Complement component C1q complex

CORUM comprehensive resource of mammalian protein complexes

More...
CORUMi
P02747

Protein interaction database and analysis system

More...
IntActi
P02747, 11 interactors

Molecular INTeraction database

More...
MINTi
P02747

STRING: functional protein association networks

More...
STRINGi
9606.ENSP00000363770

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

More...
RNActi
P02747, 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

Secondary structure

1245
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

Small Angle Scattering Biological Data Bank

More...
SASBDBi
P02747

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

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SMRi
P02747

Database of comparative protein structure models

More...
ModBasei
Search...

Protein Data Bank in Europe - Knowledge Base

More...
PDBe-KBi
Search...

Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence

More...
EvolutionaryTracei
P02747

<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>Domaini31 – 112Collagen-likeAdd BLAST82
Domaini115 – 245C1qPROSITE-ProRule annotationAdd BLAST131

Keywords - Domaini

Collagen, Repeat, Signal

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

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eggNOGi
ENOG502RZM2, Eukaryota

Ensembl GeneTree

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GeneTreei
ENSGT00940000161227

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_001074_0_2_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P02747

Identification of Orthologs from Complete Genome Data

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OMAi
YNGMVGI

Database of Orthologous Groups

More...
OrthoDBi
1258047at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P02747

TreeFam database of animal gene trees

More...
TreeFami
TF329591

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
2.60.120.40, 1 hit

Integrated resource of protein families, domains and functional sites

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InterProi
View protein in InterPro
IPR001073, C1q_dom
IPR008160, Collagen
IPR008983, Tumour_necrosis_fac-like_dom

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00386, C1q, 1 hit
PF01391, Collagen, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00007, COMPLEMNTC1Q

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00110, C1Q, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF49842, SSF49842, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS50871, C1Q, 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.

P02747-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MDVGPSSLPH LGLKLLLLLL LLPLRGQANT GCYGIPGMPG LPGAPGKDGY
60 70 80 90 100
DGLPGPKGEP GIPAIPGIRG PKGQKGEPGL PGHPGKNGPM GPPGMPGVPG
110 120 130 140 150
PMGIPGEPGE EGRYKQKFQS VFTVTRQTHQ PPAPNSLIRF NAVLTNPQGD
160 170 180 190 200
YDTSTGKFTC KVPGLYYFVY HASHTANLCV LLYRSGVKVV TFCGHTSKTN
210 220 230 240
QVNSGGVLLR LQVGEEVWLA VNDYYDMVGI QGSDSVFSGF LLFPD
Length:245
Mass (Da):25,774
Last modified:April 16, 2002 - 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:iFA17117EB7ABFC12
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 conflicti14K → R in BAB71575 (PubMed:14702039).Curated1
Sequence conflicti23P → A no nucleotide entry (PubMed:1706597).Curated1
Sequence conflicti26 – 27GQ → AK in AAP97191 (Ref. 2) Curated2
Sequence conflicti57K → P AA sequence (PubMed:486087).Curated1
Sequence conflicti66P → K AA sequence (PubMed:486087).Curated1
Sequence conflicti72K → P AA sequence (PubMed:486087).Curated1
Sequence conflicti84P → K AA sequence (PubMed:486087).Curated1
Sequence conflicti87N → D AA sequence (PubMed:486087).Curated1
Sequence conflicti90M → N AA sequence (PubMed:486087).Curated1
Sequence conflicti104I → F in AAP97191 (Ref. 2) Curated1
Sequence conflicti149G → E in AAP97191 (Ref. 2) Curated1
Sequence conflicti215E → G in BAB71575 (PubMed:14702039).Curated1

Natural variant

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Natural variantiVAR_00854234G → R in C1QD. 1 PublicationCorresponds to variant dbSNP:rs200206736EnsemblClinVar.1

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
AF087892 mRNA Translation: AAP97191.1
AK057792 mRNA Translation: BAB71575.1
AL158086 Genomic DNA No translation available.
BC009016 mRNA Translation: AAH09016.1

The Consensus CDS (CCDS) project

More...
CCDSi
CCDS227.1

Protein sequence database of the Protein Information Resource

More...
PIRi
S14351, C1HUQC

NCBI Reference Sequences

More...
RefSeqi
NP_001107573.1, NM_001114101.2
NP_001334548.1, NM_001347619.1
NP_758957.2, NM_172369.4

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENST00000374637; ENSP00000363768; ENSG00000159189
ENST00000374639; ENSP00000363770; ENSG00000159189
ENST00000374640; ENSP00000363771; ENSG00000159189

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
714

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
hsa:714

UCSC genome browser

More...
UCSCi
uc001bga.5, human

<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
AF087892 mRNA Translation: AAP97191.1
AK057792 mRNA Translation: BAB71575.1
AL158086 Genomic DNA No translation available.
BC009016 mRNA Translation: AAH09016.1
CCDSiCCDS227.1
PIRiS14351, C1HUQC
RefSeqiNP_001107573.1, NM_001114101.2
NP_001334548.1, NM_001347619.1
NP_758957.2, NM_172369.4

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
1PK6X-ray1.85C117-245[»]
2JG8X-ray2.05C/F115-245[»]
2JG9X-ray1.90C/F115-245[»]
2WNUX-ray2.30C/F115-245[»]
2WNVX-ray1.25C/F115-245[»]
5HKJX-ray1.35A115-245[»]
5HZFX-ray1.55A115-245[»]
6FCZelectron microscopy10.00C117-245[»]
6Z6VX-ray2.19C/F115-245[»]
SASBDBiP02747
SMRiP02747
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

BioGRIDi107175, 4 interactors
ComplexPortaliCPX-1919, Complement component C1q complex
CORUMiP02747
IntActiP02747, 11 interactors
MINTiP02747
STRINGi9606.ENSP00000363770

Chemistry databases

DrugBankiDB00112, Bevacizumab
DB00002, Cetuximab
DB09130, Copper
DB00111, Daclizumab
DB00005, Etanercept
DB00110, Palivizumab
DB01593, Zinc
DB14487, Zinc acetate
DB14533, Zinc chloride
DB14548, Zinc sulfate, unspecified form

PTM databases

GlyGeniP02747, 1 site
PhosphoSitePlusiP02747

Genetic variation databases

BioMutaiC1QC
DMDMi20178281

Proteomic databases

CPTACinon-CPTAC-2652
jPOSTiP02747
MassIVEiP02747
PaxDbiP02747
PeptideAtlasiP02747
PRIDEiP02747
ProteomicsDBi51563

Protocols and materials databases

Antibodypedia a portal for validated antibodies

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Antibodypediai
691, 282 antibodies

The DNASU plasmid repository

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DNASUi
714

Genome annotation databases

EnsembliENST00000374637; ENSP00000363768; ENSG00000159189
ENST00000374639; ENSP00000363770; ENSG00000159189
ENST00000374640; ENSP00000363771; ENSG00000159189
GeneIDi714
KEGGihsa:714
UCSCiuc001bga.5, human

Organism-specific databases

Comparative Toxicogenomics Database

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CTDi
714
DisGeNETi714

GeneCards: human genes, protein and diseases

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GeneCardsi
C1QC
HGNCiHGNC:1245, C1QC
HPAiENSG00000159189, Tissue enhanced (lymphoid)
MalaCardsiC1QC
MIMi120575, gene
613652, phenotype
neXtProtiNX_P02747
OpenTargetsiENSG00000159189
Orphaneti169147, Immunodeficiency due to a classical component pathway complement deficiency
PharmGKBiPA25626
VEuPathDBiHostDB:ENSG00000159189.11

GenAtlas: human gene database

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GenAtlasi
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Phylogenomic databases

eggNOGiENOG502RZM2, Eukaryota
GeneTreeiENSGT00940000161227
HOGENOMiCLU_001074_0_2_1
InParanoidiP02747
OMAiYNGMVGI
OrthoDBi1258047at2759
PhylomeDBiP02747
TreeFamiTF329591

Enzyme and pathway databases

PathwayCommonsiP02747
ReactomeiR-HSA-166663, Initial triggering of complement
R-HSA-173623, Classical antibody-mediated complement activation
R-HSA-977606, Regulation of Complement cascade

Miscellaneous databases

BioGRID ORCS database of CRISPR phenotype screens

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BioGRID-ORCSi
714, 3 hits in 984 CRISPR screens

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

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ChiTaRSi
C1QC, human
EvolutionaryTraceiP02747

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

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GenomeRNAii
714
PharosiP02747, Tbio

Protein Ontology

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PROi
PR:P02747
RNActiP02747, protein

The Stanford Online Universal Resource for Clones and ESTs

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SOURCEi
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Gene expression databases

BgeeiENSG00000159189, Expressed in layer of synovial tissue and 207 other tissues
ExpressionAtlasiP02747, baseline and differential
GenevisibleiP02747, HS

Family and domain databases

Gene3Di2.60.120.40, 1 hit
InterProiView protein in InterPro
IPR001073, C1q_dom
IPR008160, Collagen
IPR008983, Tumour_necrosis_fac-like_dom
PfamiView protein in Pfam
PF00386, C1q, 1 hit
PF01391, Collagen, 1 hit
PRINTSiPR00007, COMPLEMNTC1Q
SMARTiView protein in SMART
SM00110, C1Q, 1 hit
SUPFAMiSSF49842, SSF49842, 1 hit
PROSITEiView protein in PROSITE
PS50871, C1Q, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

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ProtoNeti
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MobiDB: a database of protein disorder and mobility annotations

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MobiDBi
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<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 nameiC1QC_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: P02747
Secondary accession number(s): Q7Z502, Q96DL2, Q96H05
<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 21, 1986
Last sequence update: April 16, 2002
Last modified: April 7, 2021
This is version 210 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)
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, Direct protein sequencing, Reference proteome

Documents

  1. Human chromosome 1
    Human chromosome 1: 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
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

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