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Protein

Complement C1q subcomponent subunit C

Gene

C1qc

Organism
Rattus norvegicus (Rat)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

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.

GO - Biological processi

Complete GO annotation...

Keywords - Biological processi

Complement pathway, Immunity, Innate immunity

Names & Taxonomyi

Protein namesi
Recommended name:
Complement C1q subcomponent subunit C
Gene namesi
Name:C1qc
Synonyms:C1qg
OrganismiRattus norvegicus (Rat)
Taxonomic identifieri10116 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaSciurognathiMuroideaMuridaeMurinaeRattus
Proteomesi
  • UP000002494 Componenti: Unplaced

Organism-specific databases

RGDi1306828. C1qc.

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Secreted

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Signal peptidei1 – 281 PublicationAdd BLAST28
ChainiPRO_000000352629 – 245Complement C1q subcomponent subunit CAdd BLAST217

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Disulfide bondi32InterchainBy similarity
Modified residuei364-hydroxyprolineBy similarity1
Modified residuei394-hydroxyprolineBy similarity1
Modified residuei424-hydroxyprolineBy similarity1
Modified residuei454-hydroxyprolineBy similarity1
Modified residuei634-hydroxyprolineBy similarity1
Modified residuei755-hydroxylysineBy similarity1
Modified residuei814-hydroxyprolineBy similarity1
Modified residuei964-hydroxyprolineBy similarity1
Modified residuei994-hydroxyprolineBy similarity1
Modified residuei1054-hydroxyprolineBy similarity1

Post-translational modificationi

Hydroxylation on proline residues within the sequence motif, GXPG, is most likely to be 4-hydroxy as this fits the requirement for 4-hydroxylation in vertebrates.By similarity

Keywords - PTMi

Disulfide bond, Hydroxylation

Proteomic databases

PaxDbiP31722.
PRIDEiP31722.

Expressioni

Gene expression databases

BgeeiENSRNOG00000012804.
GenevisibleiP31722. RN.

Interactioni

Subunit structurei

C1 is a calcium-dependent trimolecular complex of C1q, C1r and C1s 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. In addition to the major A:B and C:C dimer bands, rat, unlike human C1q, contained minor dimer species.

Protein-protein interaction databases

BioGridi263599. 1 interactor.
STRINGi10116.ENSRNOP00000017065.

Structurei

3D structure databases

ProteinModelPortaliP31722.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini31 – 112Collagen-likeAdd BLAST82
Domaini115 – 245C1qPROSITE-ProRule annotationAdd BLAST131

Sequence similaritiesi

Contains 1 C1q domain.PROSITE-ProRule annotation
Contains 1 collagen-like domain.Curated

Keywords - Domaini

Collagen, Repeat, Signal

Phylogenomic databases

eggNOGiENOG410IWVM. Eukaryota.
ENOG4111MQB. LUCA.
HOGENOMiHOG000085653.
HOVERGENiHBG108220.
InParanoidiP31722.
KOiK03988.
OrthoDBiEOG091G0L3Y.
PhylomeDBiP31722.
TreeFamiTF329591.

Family and domain databases

Gene3Di2.60.120.40. 1 hit.
InterProiIPR001073. C1q_dom.
IPR008160. Collagen.
IPR008983. Tumour_necrosis_fac-like_dom.
[Graphical view]
PfamiPF00386. C1q. 1 hit.
PF01391. Collagen. 2 hits.
[Graphical view]
PRINTSiPR00007. COMPLEMNTC1Q.
SMARTiSM00110. C1Q. 1 hit.
[Graphical view]
SUPFAMiSSF49842. SSF49842. 1 hit.
PROSITEiPS50871. C1Q. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P31722-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MVVGTSCQPQ HGLYLLLLLL ALPLRSQANA GCYGIPGMPG LPGTPGKDGH
60 70 80 90 100
DGLQGPKGEP GIPAIPGTQG PKGQKGEPGM PGHRGKNGPM GTSGSPGDPG
110 120 130 140 150
PRGPPGEPGE EGRYKQKHQS VFTVTRQTAQ YPAANGLVKF NSAITNPQGD
160 170 180 190 200
YNTNTGKFTC KVPGLYYFVH HTSQTANLCV QLLLNNAKVT SFCDHMSNSK
210 220 230 240
QVSSGGVLLR LQRGDEVWLA VNDYNGMVGT EGSDSVFSGF LLFPD
Length:245
Mass (Da):25,686
Last modified:April 26, 2005 - v2
Checksum:iD3CB28932537B4E3
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BC086409 mRNA. Translation: AAH86409.1.
RefSeqiNP_001008524.1. NM_001008524.1.
UniGeneiRn.2393.

Genome annotation databases

GeneIDi362634.
KEGGirno:362634.
UCSCiRGD:1306828. rat.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BC086409 mRNA. Translation: AAH86409.1.
RefSeqiNP_001008524.1. NM_001008524.1.
UniGeneiRn.2393.

3D structure databases

ProteinModelPortaliP31722.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi263599. 1 interactor.
STRINGi10116.ENSRNOP00000017065.

Proteomic databases

PaxDbiP31722.
PRIDEiP31722.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi362634.
KEGGirno:362634.
UCSCiRGD:1306828. rat.

Organism-specific databases

CTDi714.
RGDi1306828. C1qc.

Phylogenomic databases

eggNOGiENOG410IWVM. Eukaryota.
ENOG4111MQB. LUCA.
HOGENOMiHOG000085653.
HOVERGENiHBG108220.
InParanoidiP31722.
KOiK03988.
OrthoDBiEOG091G0L3Y.
PhylomeDBiP31722.
TreeFamiTF329591.

Miscellaneous databases

PROiP31722.

Gene expression databases

BgeeiENSRNOG00000012804.
GenevisibleiP31722. RN.

Family and domain databases

Gene3Di2.60.120.40. 1 hit.
InterProiIPR001073. C1q_dom.
IPR008160. Collagen.
IPR008983. Tumour_necrosis_fac-like_dom.
[Graphical view]
PfamiPF00386. C1q. 1 hit.
PF01391. Collagen. 2 hits.
[Graphical view]
PRINTSiPR00007. COMPLEMNTC1Q.
SMARTiSM00110. C1Q. 1 hit.
[Graphical view]
SUPFAMiSSF49842. SSF49842. 1 hit.
PROSITEiPS50871. C1Q. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiC1QC_RAT
AccessioniPrimary (citable) accession number: P31722
Secondary accession number(s): Q5RJZ8
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 1, 1993
Last sequence update: April 26, 2005
Last modified: October 5, 2016
This is version 121 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.