1l6n

STRUCTURE OF THE N-TERMINAL 283-RESIDUE FRAGMENT OF THE HIV-1 GAG POLYPROTEIN

spinqualitylabelsall models 1l6n Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1l6n is a 1 chain structure with sequence from Human immunodeficiency virus 1. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q72497_9HIV1 Capsid protein p24 forms the conical core of the virus that encapsulates the genomic RNA-nucleocapsid complex (By similarity). Nucleocapsid protein p7 encapsulates and protects viral dimeric unspliced (genomic) RNA. Binds these RNAs through its zinc fingers (By similarity).[SAAS:SAAS012344_004_011858] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The capsid protein (CA) of the mature human immunodeficiency virus (HIV) contains an N-terminal beta-hairpin that is essential for formation of the capsid core particle. CA is generated by proteolytic cleavage of the Gag precursor polyprotein during viral maturation. We have determined the NMR structure of a 283-residue N-terminal fragment of immature HIV-1 Gag (Gag(283)), which includes the intact matrix (MA) and N-terminal capsid (CA(N)) domains. The beta-hairpin is unfolded in Gag(283), consistent with the proposal that hairpin formation occurs subsequent to proteolytic cleavage of Gag, triggering capsid assembly. Comparison of the immature and mature CA(N) structures reveals that beta-hairpin formation induces a approximately 2 A displacement of helix 6 and a concomitant displacement of the cyclophylin-A (CypA)-binding loop, suggesting a possible allosteric mechanism for CypA-mediated destabilization of the capsid particle during infectivity. Structure of the N-terminal 283-residue fragment of the immature HIV-1 Gag polyprotein.,Tang C, Ndassa Y, Summers MF Nat Struct Biol. 2002 Jul;9(7):537-43. PMID:12032547 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Gag polyprotein Gag polyprotein 3D structures Virus coat proteins 3D structures

Proteopedia Page Contributors and Editors (what is this?)

OCA