PMID- 11427719 OWN - NLM STAT- MEDLINE DCOM- 20010809 LR - 20201222 IS - 0027-8424 (Print) IS - 1091-6490 (Electronic) IS - 0027-8424 (Linking) VI - 98 IP - 14 DP - 2001 Jul 3 TI - A cytomegalovirus-encoded inhibitor of apoptosis that suppresses caspase-8 activation. PG - 7829-34 AB - We have identified a human cytomegalovirus cell-death suppressor, denoted vICA, encoded by the viral UL36 gene. vICA inhibits Fas-mediated apoptosis by binding to the pro-domain of caspase-8 and preventing its activation. vICA does not share significant sequence homology with FLIPs or other known suppressors of apoptosis, suggesting that this protein represents a new class of cell-death suppressors. Notably, resistance to Fas-mediated apoptosis is delayed in fibroblasts infected with viruses that encode mutant vICA, suggesting that vICA suppresses death-receptor-induced cell death in the context of viral infection. Although vICA is dispensable for viral replication in vitro, the common targeting of caspase-8 activation by diverse herpesviruses argues for an important role for this antiapoptotic mechanism in the pathogenesis of viral infection in the host, most likely in avoiding immune clearance by cytotoxic lymphocytes and natural killer cells. FAU - Skaletskaya, A AU - Skaletskaya A AD - ImmunoGen, 128 Sidney Street, Cambridge, MA 02139, USA. FAU - Bartle, L M AU - Bartle LM FAU - Chittenden, T AU - Chittenden T FAU - McCormick, A L AU - McCormick AL FAU - Mocarski, E S AU - Mocarski ES FAU - Goldmacher, V S AU - Goldmacher VS LA - eng PT - Journal Article DEP - 20010626 PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (UL36 protein, Human herpesvirus 1) RN - 0 (Viral Proteins) RN - EC 3.4.22.- (CASP8 protein, human) RN - EC 3.4.22.- (CASP9 protein, human) RN - EC 3.4.22.- (Caspase 8) RN - EC 3.4.22.- (Caspase 9) RN - EC 3.4.22.- (Caspases) SB - IM MH - Amino Acid Sequence MH - Apoptosis/*genetics MH - Caspase 8 MH - Caspase 9 MH - Caspases/*genetics MH - Cell Line MH - Cytomegalovirus/*genetics MH - Cytomegalovirus Infections/*genetics/*pathology MH - Enzyme Activation/genetics MH - Gene Expression Regulation, Viral MH - Humans MH - Molecular Sequence Data MH - Signal Transduction/genetics MH - Viral Proteins/*genetics PMC - PMC35427 EDAT- 2001/06/28 10:00 MHDA- 2001/08/10 10:01 PMCR- 2002/01/03 CRDT- 2001/06/28 10:00 PHST- 2001/06/28 10:00 [pubmed] PHST- 2001/08/10 10:01 [medline] PHST- 2001/06/28 10:00 [entrez] PHST- 2002/01/03 00:00 [pmc-release] AID - 141108798 [pii] AID - 1087 [pii] AID - 10.1073/pnas.141108798 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 2001 Jul 3;98(14):7829-34. doi: 10.1073/pnas.141108798. Epub 2001 Jun 26.