1U6P

NMR Structure of the MLV encapsidation signal bound to the Nucleocapsid protein


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for packaging the dimeric genome of Moloney murine leukaemia virus

D'Souza, V.Summers, M.F.

(2004) Nature 431: 586-590

  • DOI: 10.1038/nature02944
  • Also Cited By: 1WWG

  • PubMed Abstract: 
  • All retroviruses specifically package two copies of their genomes during virus assembly, a requirement for strand-transfer-mediated recombination during reverse transcription. Genomic RNA exists in virions as dimers, and the overlap of RNA elements t ...

    All retroviruses specifically package two copies of their genomes during virus assembly, a requirement for strand-transfer-mediated recombination during reverse transcription. Genomic RNA exists in virions as dimers, and the overlap of RNA elements that promote dimerization and encapsidation suggests that these processes may be coupled. Both processes are mediated by the nucleocapsid domain (NC) of the retroviral Gag polyprotein. Here we show that dimerization-induced register shifts in base pairing within the Psi-RNA packaging signal of Moloney murine leukaemia virus (MoMuLV) expose conserved UCUG elements that bind NC with high affinity (dissociation constant = 75 +/- 12 nM). These elements are base-paired and do not bind NC in the monomeric RNA. The structure of the NC complex with a 101-nucleotide 'core encapsidation' segment of the MoMuLV Psi site reveals a network of interactions that promote sequence- and structure-specific binding by NC's single CCHC zinc knuckle. Our findings support a structural RNA switch mechanism for genome encapsidation, in which protein binding sites are sequestered by base pairing in the monomeric RNA and become exposed upon dimerization to promote packaging of a diploid genome.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Gag polyprotein
A
56Moloney murine leukemia virusGene Names: gag
Find proteins for P03332 (Moloney murine leukemia virus)
Go to UniProtKB:  P03332
Entity ID: 1
MoleculeChainsLengthOrganism
101-MERB101N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
AP7
Query on AP7
B
RNA LINKINGC10 H15 N5 O7 PA
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 
  • Olderado: 1U6P Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-11-02
    Type: Initial release
  • Version 1.1: 2008-01-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance