Complement Factor H Related 2

Complement factor H-related protein 2 (CFHR2) belongs to the FHR family encoded at the chromosome 1q32 cluster and comprises six short consensus repeat domains. It circulates both as a homodimer and as a CFHR2-CFHR1 heterodimer held together through the C-terminal domains of each protein. CFHR2 binds C3b and competes with factor H for surface binding, generally exerting weak deregulatory rather than protective activity; genetic deletion of CFHR2 has been linked to meningococcal disease susceptibility in population studies. Recombinant CFHR2 serves research on FHR dimerization, C3b competition, and the genetics of complement-driven disease.