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TitleCryo-electron tomographic structure of an immunodeficiency virus envelope complex in situ.
Journal, issue, pagesPLoS Pathog, Vol. 2, Issue 8, Page e83, Year 2006
Publish dateNov 30, 2006
AuthorsGiulia Zanetti / John A G Briggs / Kay Grünewald / Quentin J Sattentau / Stephen D Fuller /
PubMed AbstractThe envelope glycoprotein (Env) complexes of the human and simian immunodeficiency viruses (HIV and SIV, respectively) mediate viral entry and are a target for neutralizing antibodies. The receptor ...The envelope glycoprotein (Env) complexes of the human and simian immunodeficiency viruses (HIV and SIV, respectively) mediate viral entry and are a target for neutralizing antibodies. The receptor binding surfaces of Env are in large part sterically occluded or conformationally masked prior to receptor binding. Knowledge of the unliganded, trimeric Env structure is key for an understanding of viral entry and immune escape, and for the design of vaccines to elicit neutralizing antibodies. We have used cryo-electron tomography and averaging to obtain the structure of the SIV Env complex prior to fusion. Our result reveals novel details of Env organisation, including tight interaction between monomers in the gp41 trimer, associated with a three-lobed, membrane-distal gp120 trimer. A cavity exists at the gp41-gp120 trimer interface. Our model for the spike structure agrees with previously predicted interactions between gp41 monomers, and furthers our understanding of gp120 interactions within an intact spike.
External linksPLoS Pathog / PubMed:16933990 / PubMed Central
MethodsEM (subtomogram averaging)
Resolution28.0 Å
Structure data

EMDB-1216:
Cryo-electron tomographic structure of an immunodeficiency virus envelope complex in situ.
Method: EM (subtomogram averaging) / Resolution: 28.0 Å

Source
  • Simian immunodeficiency virus

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