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CR1 / CD35

complement component (3b/4b) receptor 1 (Knops blood group)

CR1 / CD35 is a member of the receptors of complement activation (RCA) family and is located in the 'cluster RCA' region of chromosome 1. The gene encodes a monomeric single-pass type I membrane glycoprotein found on erythrocytes, leukocytes, glomerular podocytes, and splenic follicular dendritic cells. The Knops blood group system is a system of antigens located on this protein. The protein mediates cellular binding to particles and immune complexes that have activated complement. Decreases in expression of this protein and/or mutations in its gene have been associated with gallbladder carcinomas, mesangiocapillary glomerulonephritis, systemic lupus erythematosus and sarcoidosis. Mutations in this gene have also been associated with a reduction in Plasmodium falciparum rosetting, conferring protection against severe malaria. Alternate allele-specific splice variants, encoding different isoforms, have been characterized. Additional allele specific isoforms, including a secreted form, have been described but have not been fully characterized.

Gene Name: complement component (3b/4b) receptor 1 (Knops blood group)
Family/Subfamily: Protease , Serine S1
Synonyms: CR1, C3b/C4b receptor, C3-binding protein, CD35, C3BR, Knops blood group antigen, C4BR, CD35 antigen, Complement receptor type 1, KN
Target Sequences: NM_000651 NP_000642.3 P17927

Publications (2)

1
Contribution of plasma cells and B cells to hidradenitis suppurativa pathogenesis. Johann E Gudjonsson, Lam C Tsoi, Feiyang Ma, Allison C Billi, K R van Straalen, A R J V Vossen, H H van der Zee, Paul W Harms, Rachael Wasikowski, Christine M Yee, Syed M Rizvi, Xianying Xing, Enze Xing, Olesya Plazyo, Chang Zeng, Matthew T Patrick, Margaret M Lowe, Richard E Burney, Jeffrey H Kozlow, Jill R Cherry-Bukowiec, Yanyun Jiang, Joseph Kirma, Stephan Weidinger, Kelly C Cushing, Michael D Rosenblum, Celine Berthier, Amanda S MacLeod, John J Voorhees, Fei Wen, J Michelle Kahlenberg, Eman. JCI insight. 2020 October;5: [Full Text Article] [PubMed:32853177] [PMC:PMC7566715] Related Antibodies: LS-C675585.
2
Promotion of the inflammatory response in mid colon of complement component 3 knockout mice. Yun Ju Choi, Ji Eun Kim, Su Jin Lee, Jeong Eun Gong, You Jeong Jin, Ho Lee, Dae Youn Hwang. Scientific reports. 2022 February;12:1700. [Full Text Article] [PubMed:35105928] [PMC:PMC8807838] Related Antibodies: LS-C777464.

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For RESEARCH USE ONLY. Intended for use by laboratory professionals. Not intended for human diagnostic or therapeutic purposes.

The data on this page has been compiled from LifeSpan internal sources, the National Center for Biotechnology Information (NCBI), and The Universal Protein Resource (UniProt).