Maturation of the matrix and viral membrane of HIV-1.
Maturation of the matrix and viral membrane of HIV-1.
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DOI:
10.1126/science.abe6821
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发表时间:
2021-08-06
期刊:
影响因子:
--
通讯作者:
Briggs JAG
中科院分区:
文献类型:
--
作者:
Qu K;Ke Z;Zila V;Anders-Össwein M;Glass B;Mücksch F;Müller R;Schultz C;Müller B;Kräusslich HG;Briggs JAG
Gag – the main structural protein of HIV-1 – is recruited to the plasma membrane for virus assembly by its matrix (MA) domain. Gag is subsequently cleaved into its component domains, causing structural maturation to repurpose the virion for cell entry. We determined the structure and arrangement of MA within immature and mature HIV-1 by cryo-electron tomography. We found that MA rearranges between two different hexameric lattices upon maturation. In mature HIV-1, a lipid extends out of the membrane to bind a pocket in MA. Our data suggest that proteolytic maturation of HIV-1 not only achieves assembly of the viral capsid surrounding the genome, but extends to repurpose the membrane-bound MA lattice for an entry or post-entry function, and causes partial removal of up to 2,500 lipids from the viral membrane.
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