Critical mechanistic features of HIV-1 viral capsid assembly.
Critical mechanistic features of HIV-1 viral capsid assembly.
复制标题
DOI:
10.1126/sciadv.add7434
复制
发表时间:
2023-01-06
期刊:
影响因子:
13.6
通讯作者:
中科院分区:
文献类型:
--
作者:
The maturation of HIV-1 capsid protein (CA) into a cone-shaped lattice capsid is critical for viral infectivity. CA can self-assemble into a range of capsid morphologies made of ~175 to 250 hexamers and 12 pentamers. The cellular polyanion inositol hexakisphosphate (IP6) has recently been demonstrated to facilitate conical capsid formation by coordinating a ring of arginine residues within the central cavity of capsid hexamers and pentamers. However, the kinetic interplay of events during IP6 and CA coassembly is unclear. In this work, we use coarse-grained molecular dynamics simulations to elucidate the molecular mechanism of capsid formation, including the role played by IP6. We show that IP6, in small quantities at first, promotes curvature generation by trapping pentameric defects in the growing lattice and shifts assembly behavior toward kinetically favored outcomes. Our analysis also suggests that IP6 can stabilize metastable capsid intermediates and can induce structural pleomorphism in mature capsids. Computer simulations reveal that IP6 promotes fullerene-like capsid formation by stabilizing high curvature regions of the capsid.
登录
查看更多内容
影响因子:
5.4
作者:
Keller, Paul W.;Huang, Rick K.;Steven, Alasdair C.
通讯作者:
Steven, Alasdair C.
影响因子:
64.8
作者:
Bharat, Tanmay A. M.;Davey, Norman E.;Briggs, John A. G.
通讯作者:
Briggs, John A. G.
影响因子:
3.4
作者:
Chen, Bo;Tycko, Robert
通讯作者:
Tycko, Robert
影响因子:
--
作者:
Ganser-Pornillos BK;Yeager M;Pornillos O
通讯作者:
Pornillos O
影响因子:
64.8
作者:
Jacques DA;McEwan WA;Hilditch L;Price AJ;Towers GJ;James LC
通讯作者:
James LC