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Complement C1q subcomponent subunit A

ID 3815
Name Complement C1q subcomponent subunit A
Synonyms
  • Complement C1q subcomponent subunit A precursor
Gene Name C1QA
Protein Sequence
>Complement C1q subcomponent subunit A
MEGPRGWLVLCVLAISLASMVTEDLCRAPDGKKGEAGRPGRRGRPGLKGEQGEPGAPGIR
TGIQGLKGDQGEPGPSGNPGKVGYPGPSGPLGARGIPGIKGTKGSPGNIKDQPRPAFSAI
RRNPPMGGNVVIFDTVITNQEEPYQNHSGRFVCTVPGYYYFTFQVLSQWEICLSIVSSSR
GQVRRSLGFCDTTNKGLFQVVSGGMVLQLQQGDQVWVEKDPKKGHIYQGSEADSVFSGFL
IFPSA
Number of Residues 245
Molecular Weight 26017
Theoretical pI 9.45
GO Classification
Component
cell
intracellular
cytoplasm
Process
physiological process
cellular physiological process
transport
ion transport
anion transport
inorganic anion transport
phosphate transport
General Function Not Available
Specific Function 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 Ca(2+)-dependent C1r(2)C1s(2) 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
Pathways Not Available
Reactions Not Available
Pfam Domain Function
Signals 1-22
Transmembrane Regions None
Essentiality Non-Essential
GenBank Protein ID 4894854 Link_out
UniProtKB ID P02745 Link_out
UniProtKB Entry Name C1QA_HUMAN Link_out
PDB ID 1PK6 Link_out
PDB File show
3D Structure View 3D Structure
Cellular Location Secreted protein
Gene Sequence
>738 bp
ATGGAGGGTCCCCGGGGATGGCTGGTGCTCTGTGTGCTGGCCATATCGCTGGCCTCTATG
GTGACCGAGGACTTGTGCCGAGCACCAGACGGGAAGAAAGGGGAGGCAGGAAGACCTGGC
AGACGGGGGCGGCCAGGCCTCAAGGGGGAGCAAGGGGAGCCGGGGGCCCCTGGCATCCGG
ACAGGCATCCAAGGCCTTAAAGGAGACCAGGGGGAACCTGGGCCCTCTGGAAACCCCGGC
AAGGTGGGCTACCCAGGGCCCAGCGGCCCCCTCGGGGCCCGTGGCATCCCGGGAATTAAA
GGCACCAAGGGCAGCCCAGGAAACATCAAGGACCAGCCGAGGCCAGCCTTCTCCGCCATT
CGGCGGAACCCCCCAATGGGGGGCAACGTGGTCATCTTCGACACGGTCATCACCAACCAG
GAAGAACCGTACCAGAACCACTCCGGCCGATTCGTCTGCACTGTACCCGGCTACTACTAC
TTCACCTTCCAGGTGCTGTCCCAGTGGGAAATCTGCCTGTCCATCGTCTCCTCCTCAAGG
GGCCAGGTCCGACGCTCCCTGGGCTTCTGTGACACCACCAACAAGGGGCTCTTCCAGGTG
GTGTCAGGGGGCATGGTGCTTCAGCTGCAGCAGGGTGACCAGGTCTGGGTTGAAAAAGAC
CCCAAAAAGGGTCACATTTACCAGGGCTCTGAGGCCGACAGCGTCTTCAGCGGCTTCCTC
ATCTTCCCATCTGCCTGA
GenBank Gene ID AF135157 Link_out
GeneCard ID C1QA Link_out
GenAtlas ID C1QA Link_out
HGNC ID HGNC:1241 Link_out
HPRD ID Not Available
IUPHAR ID Not Available
Guide to Pharmacology ID Not Available
Chromosome Location Not Available
Locus 1p36.12
SNPs C1QA Link_out
General References
  1. Sellar GC, Blake DJ, Reid KB: Characterization and organization of the genes encoding the A-, B- and C-chains of human complement subcomponent C1q. The complete derived amino acid sequence of human C1q. Biochem J. 1991 Mar 1;274 ( Pt 2):481-90. Pubmed
  2. Reid KB: Complete amino acid sequences of the three collagen-like regions present in subcomponent C1q of the first component of human complement. Biochem J. 1979 May 1;179(2):367-71. Pubmed
  3. Reid KB, Gagnon J, Frampton J: Completion of the amino acid sequences of the A and B chains of subcomponent C1q of the first component of human complement. Biochem J. 1982 Jun 1;203(3):559-69. Pubmed
  4. Gaboriaud C, Juanhuix J, Gruez A, Lacroix M, Darnault C, Pignol D, Verger D, Fontecilla-Camps JC, Arlaud GJ: The crystal structure of the globular head of complement protein C1q provides a basis for its versatile recognition properties. J Biol Chem. 2003 Nov 21;278(47):46974-82. Epub 2003 Sep 5. Pubmed
  5. Petry F: Molecular basis of hereditary C1q deficiency. Immunobiology. 1998 Aug;199(2):286-94. Pubmed
Drugs
# DrugBank ID Drug Name Drug Type Drug Groups
1 DB00054 Abciximab biotech approved
2 DB00051 Adalimumab biotech approved
3 DB00092 Alefacept biotech approved, investigational
4 DB00087 Alemtuzumab biotech approved, investigational
5 DB00074 Basiliximab biotech approved, investigational
6 DB00112 Bevacizumab biotech approved, investigational
7 DB00002 Cetuximab biotech approved
8 DB00111 Daclizumab biotech approved, investigational
9 DB00095 Efalizumab biotech approved, investigational
10 DB00005 Etanercept biotech approved, investigational
11 DB00056 Gemtuzumab ozogamicin biotech approved, investigational
12 DB00078 Ibritumomab biotech approved
13 DB00075 Muromonab biotech approved
14 DB00108 Natalizumab biotech approved, investigational
15 DB00110 Palivizumab biotech approved, investigational
16 DB00073 Rituximab biotech approved
17 DB00081 Tositumomab biotech approved
18 DB00072 Trastuzumab biotech approved, investigational