Alternative titles; symbols
HGNC Approved Gene Symbol: CR1L
Cytogenetic location: 1q32.2 Genomic coordinates (GRCh38) : 1:207,645,133-207,723,703 (from NCBI)
The C3b/C4b receptor (CR1; 120620) is important in immune complex processing. On phagocytic cells it promotes the adherence and sometimes the endocytosis of C3b- and C4b-coated particles. CR1 is composed largely of a tandemly repeated motif of approximately 60 amino acids, the short consensus repeat (SCR). In the course of cloning genomic CR1 sequences, Hourcade et al. (1990) identified a related gene, CR1L. Analysis of subclones identified 10 exons encoding a signal peptide and SCR1 through SCR6 and SCR9, which are 91% homologous to the corresponding N-terminal regions of the CR1 protein. Hourcade et al. (1990) concluded that CR1L arose by a gene duplication event and has undergone mutation at the beginning of SCR1.
By genomic sequence analysis, Hourcade et al. (1990) mapped the CR1L gene to chromosome 1q32.
Hourcade, D., Miesner, D. R., Bee, C., Zeldes, W., Atkinson, J. P. Duplication and divergence of the amino-terminal coding region of the complement receptor 1 (CR1) gene: an example of concerted (horizontal) evolution within a gene. J. Biol. Chem. 265: 974-980, 1990. [PubMed: 2295627]