1baj
From Proteopedia
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'''HIV-1 CAPSID PROTEIN C-TERMINAL FRAGMENT PLUS GAG P2 DOMAIN''' | '''HIV-1 CAPSID PROTEIN C-TERMINAL FRAGMENT PLUS GAG P2 DOMAIN''' | ||
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[[Category: Worthylake, D K.]] | [[Category: Worthylake, D K.]] | ||
[[Category: Yoo, S.]] | [[Category: Yoo, S.]] | ||
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- | [[Category: | + | [[Category: Hiv-1 assembly protein]] |
- | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 11:16:47 2008'' | |
- | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + |
Revision as of 08:16, 2 May 2008
HIV-1 CAPSID PROTEIN C-TERMINAL FRAGMENT PLUS GAG P2 DOMAIN
Overview
The human immunodeficiency virus type I (HIV-1) capsid protein is initially synthesized as the central domain of the Gag polyprotein, and is subsequently proteolytically processed into a discrete 231-amino-acid protein that forms the distinctive conical core of the mature virus. The crystal structures of two proteins that span the C-terminal domain of the capsid are reported here: one encompassing residues 146-231 (CA146-231) and the other extending to include the 14-residue p2 domain of Gag (CA146-p2). The isomorphous CA146-231 and CA146-p2 structures were determined by molecular replacement and have been refined at 2.6 A resolution to R factors of 22.3 and 20.7% (Rfree = 28.1 and 27.5%), respectively. The ordered domains comprise residues 148-219 for CA146-231 and 148-218 for CA146-p2, and their refined structures are essentially identical. The proteins are composed of a 310 helix followed by an extended strand and four alpha-helices. A crystallographic twofold generates a dimer that is stabilized by parallel packing of an alpha-helix 2 across the dimer interface and by packing of the 310 helix into a groove created by alpha-helices 2 and 3 of the partner molecule. CA146-231 and CA146-p2 dimerize with the full affinity of the intact capsid protein, and their structures therefore reveal the essential dimer interface of the HIV-1 capsid.
About this Structure
1BAJ is a Single protein structure of sequence from Human immunodeficiency virus 1. Full crystallographic information is available from OCA.
Reference
Structures of the HIV-1 capsid protein dimerization domain at 2.6 A resolution., Worthylake DK, Wang H, Yoo S, Sundquist WI, Hill CP, Acta Crystallogr D Biol Crystallogr. 1999 Jan;55(Pt 1):85-92. Epub 1999, Jan 1. PMID:10089398 Page seeded by OCA on Fri May 2 11:16:47 2008