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TitleDistribution and three-dimensional structure of AIDS virus envelope spikes.
Journal, issue, pagesNature, Vol. 441, Issue 7095, Page 847-852, Year 2006
Publish dateJun 15, 2006
AuthorsPing Zhu / Jun Liu / Julian Bess / Elena Chertova / Jeffrey D Lifson / Henry Grisé / Gilad A Ofek / Kenneth A Taylor / Kenneth H Roux /
PubMed AbstractEnvelope glycoprotein (Env) spikes on AIDS retroviruses initiate infection of host cells and are therefore targets for vaccine development. Though crystal structures for partial Env subunits are ...Envelope glycoprotein (Env) spikes on AIDS retroviruses initiate infection of host cells and are therefore targets for vaccine development. Though crystal structures for partial Env subunits are known, the structure and distribution of native Env spikes on virions is obscure. We applied cryoelectron microscopy tomography to define ultrastructural details of spikes. Virions of wild-type human immunodeficiency virus 1 (HIV-1) and a mutant simian immunodeficiency virus (SIV) had approximately 14 and approximately 73 spikes per particle, respectively, with some clustering of HIV-1 spikes. Three-dimensional averaging showed that the surface glycoprotein (gp120) 'head' of each subunit of the trimeric SIV spike contains a primary mass, with two secondary lobes. The transmembrane glycoprotein 'stalk' of each trimer is composed of three independent legs that project obliquely from the trimer head, tripod-like. Reconciling available atomic structures with the three-dimensional whole spike density map yields insights into the orientation of Env spike structural elements and possible structural bases of their functions.
External linksNature / PubMed:16728975
MethodsEM (subtomogram averaging)
Resolution32.0 Å
Structure data

EMDB-1246:
Distribution and three-dimensional structure of AIDS virus envelope spikes.
Method: EM (subtomogram averaging) / Resolution: 32.0 Å

EMDB-1247:
Distribution and three-dimensional structure of AIDS virus envelope spikes.
Method: EM (subtomogram averaging) / Resolution: 32.0 Å

Source
  • Simian immunodeficiency virus

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