CD55 molecule (Cromer blood group)
The information on this page was automatically extracted from online scientific databases.
From NCBI Gene:
This gene encodes a glycoprotein involved in the regulation of the complement cascade. Binding of the encoded protein to complement proteins accelerates their decay, thereby disrupting the cascade and preventing damage to host cells. Antigens present on this protein constitute the Cromer blood group system (CROM). Alternative splicing results in multiple transcript variants. The predominant transcript variant encodes a membrane-bound protein, but alternatively spliced transcripts may produce soluble proteins. [provided by RefSeq, Jul 2014]
(Microbial infection) Acts as a receptor for coxsackievirus A21, coxsackieviruses B1, B3 and B5 (PubMed:9151867). Acts as a receptor for human enterovirus 70 and D68 (Probable) (PubMed:8764022). Acts as a receptor for human echoviruses 6, 7, 11, 12, 20 and 21 (PubMed:7525274).
This protein recognizes C4b and C3b fragments that condense with cell-surface hydroxyl or amino groups when nascent C4b and C3b are locally generated during C4 and c3 activation. Interaction of daf with cell-associated C4b and C3b polypeptides interferes with their ability to catalyze the conversion of C2 and factor B to enzymatically active C2a and Bb and thereby prevents the formation of C4b2a and C3bBb, the amplification convertases of the complement cascade (PubMed:7525274). Inhibits complement activation by destabilizing and preventing the formation of C3 and C5 convertases, which prevents complement damage (PubMed:28657829).
From NCBI Gene:
- Enteropathy, protein-losing
- Cromer blood group system
Complement hyperactivation, angiopathic thrombosis, and protein-losing enteropathy (CHAPLE): An autosomal recessive disease characterized by abdominal pain and diarrhea, primary intestinal lymphangiectasia, edema due to hypoproteinemia, malabsorption, and less frequently, bowel inflammation, recurrent infections, and angiopathic thromboembolic disease. Patients' T lymphocytes show increased complement activation causing surface deposition of complement and the generation of soluble C5a. [MIM:226300]