Inhibition of host complement factors by virus (kw:KW-1087)
The complement system is a major non-specific mechanism of humoral immunity. The activation of complement involves the sequential proteolyis of proteins to generate enzymes with catalytic activities. The biological functions of the complement include opsonization, inflammation, lysis of immune complexes, or enhancement of the humoral immune response.

Members of the herpesvirus, orthopoxvirus and retrovirus families mimic or interact with complement regulatory proteins to block complement activation and neutralization of virus particles. For example, vaccinia and variola viruses encode secreted proteins that block C3 convertase assembly. Influenza A virus instead blocks the complement pathway via M1 protein interacting with and inhibiting host C1qA protein.
Matching UniProtKB/Swiss-Prot entries
(all links/actions below point to uniprot.org website)18 entries grouped by strain
1 entry
Equine herpesvirus 1 (strain Ab4p) (EHV-1) (Equine abortion virus) reference strain
1 entry
Human herpesvirus 1 (strain 17) (HHV-1) (Human herpes simplex virus 1) reference strain
1 entry
Human herpesvirus 2 (strain HG52) (HHV-2) (Human herpes simplex virus 2) reference strain
1 entry
Human herpesvirus 8 type P (isolate GK18) (HHV-8) (Kaposi's sarcoma-associated herpesvirus) reference strain
1 entry
Turkey astrovirus 1 (TAstV-1) reference strain
1 entry
Vaccinia virus (strain Copenhagen) (VACV) reference strain
1 entry
Vaccinia virus (strain Western Reserve) (VACV) (Vaccinia virus (strain WR)) reference strain
1 entry
Varicella-zoster virus (strain Dumas) (HHV-3) (Human herpesvirus 3) reference strain
1 entry
Avian nephritis virus 1 (ANV-1)
1 entry
Bovine herpesvirus 1.1 (strain Cooper) (BoHV-1) (Infectious bovine rhinotracheitis virus)
1 entry
Equine herpesvirus 1 (strain Kentucky D) (EHV-1) (Equine abortion virus)
1 entry
Equine herpesvirus 4 (strain 1942) (EHV-4) (Equine rhinopneumonitis virus)
1 entry
Human herpesvirus 1 (strain KOS) (HHV-1) (Human herpes simplex virus 1)
1 entry
Human herpesvirus 2 (strain 333) (HHV-2) (Human herpes simplex virus 2)
1 entry
Human herpesvirus 2 (strain G) (HHV-2) (Human herpes simplex virus 2)
1 entry
Mosquito cell fusing agent (CFA flavivirus)
1 entry
Suid herpesvirus 1 (strain Indiana-Funkhauser / Becker) (SuHV-1) (Pseudorabies virus (strain Indiana-Funkhauser / Becker))
1 entry