1GWP

STRUCTURE OF THE N-TERMINAL DOMAIN OF THE MATURE HIV-1 CAPSID PROTEIN


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST TARGET FUNCTION 

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This is version 1.2 of the entry. See complete history


Literature

Structure of the N-Terminal 283-Residue Fragment of the Immature HIV-1 Gag Polyprotein

Tang, C.Ndassa, Y.Summers, M.F.

(2002) Nat Struct Biol 9: 537

  • DOI: 10.1038/nsb806
  • Primary Citation of Related Structures:  
    1L6N, 1GWP

  • PubMed Abstract: 
  • 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 ...

    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.


    Related Citations: 
    • Structure of the Amino-Terminal Core Domain of the HIV-1 Capsid Protein.
      Gitti, R.K., Lee, B.M., Walker, J., Summers, M.F., Yoo, S., Sundquist, W.I.
      (1996) Science 273: 231

    Organizational Affiliation

    Howard Hughes Medical Institute and Department of Chemistry and Biochemistry, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GAG POLYPROTEIN A151Human immunodeficiency virus type 1 (NEW YORK-5 ISOLATE)Mutation(s): 0 
Gene Names: gag
Find proteins for P12493 (Human immunodeficiency virus type 1 group M subtype B (isolate NY5))
Explore P12493 
Go to UniProtKB:  P12493
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST TARGET FUNCTION 
  • OLDERADO: 1GWP Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-06-21
    Type: Initial release
  • Version 1.1: 2014-02-05
    Changes: Database references, Derived calculations, Other, Source and taxonomy, Structure summary, Version format compliance
  • Version 1.2: 2014-03-12
    Changes: Source and taxonomy