1BMX

HIV-1 CAPSID PROTEIN MAJOR HOMOLOGY REGION PEPTIDE ANALOG, NMR, 8 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 
  • Selection Criteria: LEAST RESTRAINT VIOLOATION 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structures of human immunodeficiency virus type 1 (HIV-1) and moloney murine leukemia virus (MoMLV) capsid protein major-homology-region peptide analogs by NMR spectroscopy.

Clish, C.B.Peyton, D.H.Barklis, E.

(1998) Eur.J.Biochem. 257: 69-77

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The capsid domain of retroviral Gag proteins possesses a single highly conserved subdomain termed the major homology region (MHR). While the mutagenesis of residues in the MHR will impair virus infectivity, the precise solution structure and function ...

    The capsid domain of retroviral Gag proteins possesses a single highly conserved subdomain termed the major homology region (MHR). While the mutagenesis of residues in the MHR will impair virus infectivity, the precise solution structure and function of the MHR is not known. To aid the structure/function characterization of the MHR, the structures of synthetic peptides encompassing the MHR of the human immunodeficiency virus type I (HIV-1) and Moloney murine leukemia virus (MoMLV) capsid proteins were investigated by several techniques. Homology-based secondary-structure prediction suggested that the HIV-1 and MoMLV peptides could form 50% and 38% alpha-helix, respectively. CD studies indicated that, in the presence of 50% trifluoroethanol, the HIV-1 peptide adopts an alpha-helical structure over half of its length, while the MoMLV peptide is over one third alpha-helix. Further analysis by 1H-NMR suggested that the C-terminal portion of the MHR of each virus forms a helix in aqueous solution. Distance-geometry structures of each peptide were calculated from NOE distance restraints and were refined by restrained molecular dynamics. The C-terminal halves of both peptides were observed to be in an alpha-helical conformation, while the N-terminal halves were disordered. Furthermore, both helices were amphipathic with high conservation of amino acid side-chain character, suggesting that a conserved helical MHR C-terminus is essential to retroviral capsid protein function.


    Organizational Affiliation

    Department of Chemistry, Portland State University, Oregon 97207-0751, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HUMAN IMMUNODEFICIENCY VIRUS TYPE 1 CAPSID
A
31Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: gag
Find proteins for Q76258 (Human immunodeficiency virus 1)
Go to UniProtKB:  Q76258
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 
  • Selection Criteria: LEAST RESTRAINT VIOLOATION 
  • Olderado: 1BMX Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-01-06
    Type: Initial release
  • Version 1.1: 2008-03-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance