期刊
ANTIVIRAL RESEARCH
卷 101, 期 -, 页码 30-36出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.antiviral.2013.10.015
关键词
Pestivirus; Classical swine fever virus; Viroporin; Viroporin inhibition; Channel blocker; Pore-forming protein
资金
- Spanish MINECO
- Basque Government [BIO2011-29792, IT838-13]
Viroporins are small integral membrane proteins functional in viral assembly and egress by promoting permeabilization. Blocking of viroporin function therefore constitutes a target for antiviral development. Classical swine fever virus (CSFV) protein p7 has been recently regarded as a class II viroporin. Here, we sought to establish the determinants of the CSFV p7 permeabilizing activity in a minimal model system. Assessment of an overlapping peptide library mapped the porating domain to the C-terminal hydrophobic stretch (residues 39-67). Pore-opening dependence on pH or sensitivity to channel blockers observed for the full protein required the inclusion of a preceding polar sequence (residues 33-38). Effects of lipid composition and structural data further support that the resulting peptide (residues 33-67), may comprise a bona fide surrogate to assay p7 activity in model membranes. Our observations imply that CSFV p7 relies on genus-specific structures-mechanisms to perform its viroporin function. (C) 2013 Elsevier B.V. All rights reserved.
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