NCIt synonyms : C3BR; Complement Component (3b/4b) Receptor 1 (Knops Blood Group) wt Allele; C4BR; KN; Complement Component (3b/4b) Receptor 1, Including Knops Blood Group System Gene; CD35;
NCIt definition : Human CR1 wild-type allele is located in the vicinity of 1q32 and is approximately
146 kb in length. This allele, which encodes complement receptor type 1 protein, plays
a role in complement-mediated immunity. Genetic polymorphisms are associated with
the extent of malarial rosetting, and can confer protection against severe malaria.
Genetic variation of the gene may contribute to Alzheimer's Disease.;
NCIt note : This gene is a member of the receptors of complement activation (RCA) family and is
located in the 'cluster RCA' region of chromosome 1.; CR1 polymorphisms comprise a system of antigens called the Knops blood group system.;