FEATURES

DESCRIPTION

Also known as CFAH_HUMAN, CFH, HF, HF1, HF2. Glycoprotein that plays an essential role in maintaining a well-balanced immune response by modulating complement activation. Acts as a soluble inhibitor of complement, where its binding to self markers such as glycan structures prevents complement activation and amplification on cell surfaces (PubMed:21285368, PubMed:25402769). Accelerates the decay of the complement alternative pathway (AP) C3 convertase C3bBb, thus preventing local formation of more C3b, the central player of the complement amplification loop (PubMed:19503104). As a cofactor of the serine protease factor I, CFH also regulates proteolytic degradation of already-deposited C3b (PubMed:18252712, PubMed:28671664). In addition, mediates several cellular responses through interaction with specific receptors. For example, interacts with CR3/ITGAM receptor and thereby mediates the adhesion of human neutrophils to different pathogens. In turn, these pathogens are phagocytosed and destroyed (PubMed:9558116, PubMed:20008295). Homodimer (PubMed:18005991, PubMed:19505476). Forms also homooligomers (PubMed:19505476). Interacts with complement protein C3b; this interaction inhibits complement activation (PubMed:16601698, PubMed:19503104, PubMed:20378178, PubMed:21285368, PubMed:28671664). Interacts with complement protein C3d (PubMed:20378178, PubMed:21285368, PubMed:29190743). Interacts with CR3/ITGAM; this interaction mediates adhesion of neutrophils to pathogens leading to pathogen clearance (PubMed:9558116, PubMed:20008295). Interacts with complement factor I (PubMed:28671664).

EXTERNAL LINKS

CFH

Complement factor H

CFH

Molecular Synopsis