1JU1

Dimer Initiation Sequence of HIV-1Lai Genomic RNA: NMR Solution Structure of the Extended Duplex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 15 
  • Conformers Submitted: 15 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum, structures with acceptable covalent geometry, structures with the least restraint violations, structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Dimer initiation sequence of HIV-1Lai genomic RNA: NMR solution structure of the extended duplex.

Girard, F.Barbault, F.Gouyette, C.Huynh-Dinh, T.Paoletti, J.Lancelot, G.

(1999) J.Biomol.Struct.Dyn. 16: 1145-1157

  • DOI: 10.1080/07391102.1999.10508323

  • PubMed Abstract: 
  • The genome of all retrovirus consists of two copies of genomic RNA which are noncovalently linked near their 5' end. A sequence localized immediately upstream from the splice donor site inside the HIV-1 psi-RNA region was identified as the domain res ...

    The genome of all retrovirus consists of two copies of genomic RNA which are noncovalently linked near their 5' end. A sequence localized immediately upstream from the splice donor site inside the HIV-1 psi-RNA region was identified as the domain responsible for the dimerization initiation. It was shown that a kissing complex and a stable dimer are both involved in the HIV-1Lai RNA dimerization process in vitro. The NCp7 protein activates the dimerization by converting a transient loop-loop complex into a more stable dimer. The structure of this transitory loop-loop complex was recently elucidated by Mujeeb et al. In work presented here, we use NMR spectroscopy to determine the stable extended dimer structure formed from a 23 nucleotides RNA fragment, part of the 35 nucleotides SL1 sequence. By heating to 90 degrees C, then slowly cooling this sequence, we were able to show that an extended dimer is formed. We present evidence for the three dimensional structure of this dimer. NMR data yields evidence for a zipper like motif A8A9.A16 existence. This motif enables the surrounding bases to be positioned more closely and permit the G7 and C17 bases to be paired. This is different to other related sequences where only the kissing complex is observed, we suggest that the zipper like motif AA.A could be an important stabilization factor of the extended duplex.


    Organizational Affiliation

    Centre de Biophysique Moléculaire, CNRS, Orléans, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
HIV-1Lai SL1A,B23N/A
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 15 
  • Conformers Submitted: 15 
  • Selection Criteria: back calculated data agree with experimental NOESY spectrum, structures with acceptable covalent geometry, structures with the least restraint violations, structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-08-23
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance