Gene Information
Gene NameC4B
OrganismHomo sapiens (Human)
Gene Length1744
Protein NamesComplement C4-B (Basic complement C4) (C3 and PZP-like alpha-2-macroglobulin domain-containing protein 3) [Cleaved into: Complement C4 beta chain; Complement C4-B alpha chain; C4a anaphylatoxin; C4b-B; C4d-B; Complement C4 gamma chain]
Target Namecomplement c4-b
Target TypeNA
Gene Age680 ( ENSG00000224389 )
3 ( ENSG00000228267 )
3 ( ENSG00000228454 )
3 ( ENSG00000236625 )
Evolutionary StageEumetazoa
AlphaFoldDBP0C0L5
Gene CardC4B;C4B_2
Uniprot IDP0C0L5
PfamPF00207; PF07703; PF07677; PF01821; PF01835; PF17791; PF17789; PF01759; PF07678
In ASDno
Allosteric Predictionyes (0.278546977)
Ortholog in AnimalsMouse_ C4b ( ortholog_one2many )
Rat_ C4a ( ortholog_many2many )
Rat_ C4b ( ortholog_many2many )
OhnologsNA
ParalogsCPAMD8, A2M, C3, A2ML1, CD109, PZP, C5, C4A
Tissueliver, adrenal.gland
Tissue SpecificityComplement component C4 is expressed at highest levels in the liver, at moderate levels in the adrenal cortex, adrenal medulla, thyroid gland, and the kidney, and at lowest levels in the heart, ovary, small intestine, thymus, pancreas and spleen. The extra-hepatic sites of expression may be important for the local protection and inflammatory response. {ECO:0000269|PubMed:11367523}.
Pharmacological Animal ModelsNA
Gene Ontology
(biological process)
Gene Ontology
(cellular component)
Gene Ontology
(molecular function)
PDB 4XAM  6YSQ  (X-ray  3.30A 
DBSNP rs139889867  rs796750528  rs2258218  rs2746414  rs2229403  rs2229409  rs2023616 
Subcellular location [CC]Secreted. Synapse {ECO:0000269|PubMed:26814963}. Cell projection, axon {ECO:0000269|PubMed:26814963}. Cell projection, dendrite {ECO:0000269|PubMed:26814963}.
Mouse PG classificationNA
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