Unknown

Dataset Information

0

CD4-induced activation in a soluble HIV-1 Env trimer.


ABSTRACT: The HIV envelope glycoprotein (Env) trimer undergoes receptor-induced conformational changes that drive fusion of the viral and cellular membranes. Env conformational changes have been observed using low-resolution electron microscopy, but only large-scale rearrangements have been visible. Here, we use hydrogen-deuterium exchange and oxidative labeling to gain a more precise understanding of the unliganded and CD4-bound forms of soluble Env trimers (SOSIP.664), including their glycan composition. CD4 activation induces the reorganization of bridging sheet elements, V1/V2 and V3, much of the gp120 inner domain, and the gp41 fusion subunit. Two CD4 binding site-targeted inhibitors have substantially different effects: NBD-556 partially mimics CD4-induced destabilization of the V1/V2 and V3 crown, whereas BMS-806 only affects regions around the gp120/gp41 interface. The structural information presented here increases our knowledge of CD4- and small molecule-induced conformational changes in Env and the allosteric pathways that lead to membrane fusion.

SUBMITTER: Guttman M 

PROVIDER: S-EPMC4231881 | biostudies-literature | 2014 Jul

REPOSITORIES: biostudies-literature

altmetric image

Publications

CD4-induced activation in a soluble HIV-1 Env trimer.

Guttman Miklos M   Garcia Natalie K NK   Cupo Albert A   Matsui Tsutomu T   Julien Jean-Philippe JP   Sanders Rogier W RW   Wilson Ian A IA   Moore John P JP   Lee Kelly K KK  

Structure (London, England : 1993) 20140612 7


The HIV envelope glycoprotein (Env) trimer undergoes receptor-induced conformational changes that drive fusion of the viral and cellular membranes. Env conformational changes have been observed using low-resolution electron microscopy, but only large-scale rearrangements have been visible. Here, we use hydrogen-deuterium exchange and oxidative labeling to gain a more precise understanding of the unliganded and CD4-bound forms of soluble Env trimers (SOSIP.664), including their glycan composition  ...[more]

Similar Datasets

| S-EPMC5411596 | biostudies-literature
| S-EPMC5389922 | biostudies-literature
| S-EPMC5222517 | biostudies-literature
| S-EPMC9769388 | biostudies-literature
| S-EPMC5612115 | biostudies-literature
| S-EPMC4744550 | biostudies-literature
| S-EPMC4020869 | biostudies-literature
| S-EPMC4505645 | biostudies-literature
| S-EPMC3777863 | biostudies-literature
| S-EPMC10686819 | biostudies-literature