A Structural Study of the CA Dinucleotide Step in the Integrase Processing Site of Moloney Murine Leukemia Virus

Experimental Data Snapshot

  • Resolution: 2.25 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.288 

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Crystal structures of oligonucleotides including the integrase processing site of the Moloney murine leukemia virus.

Montano, S.P.Cote, M.L.Roth, M.J.Georgiadis, M.M.

(2006) Nucleic Acids Res 34: 5353-5360

  • DOI: https://doi.org/10.1093/nar/gkl693
  • Primary Citation of Related Structures:  
    2FVP, 2FVQ, 2FVR, 2FVS

  • PubMed Abstract: 

    In the first step of retroviral integration, integrase cleaves the linear viral DNA within its long terminal repeat (LTR) immediately 3' to the CA dinucleotide step, resulting in a reactive 3' OH on one strand and a 5' two base overhang on the complementary strand. In order to investigate the structural properties of the 3' end processing site within the Moloney murine leukemia virus (MMLV) LTR d(TCTTTCATT), a host-guest crystallographic method was employed to determine the structures of four self-complementary 16 bp oligonucleotides including LTR sequences (underlined), d(TTTCATTGCAATGAAA), d(CTTTCATTAATGAAAG), d(TCTTTCATATGAAAGA) and d(CACAATGATCATTGTG), the guests, complexed with the N-terminal fragment of MMLV reverse transcriptase, the host. The structures of the LTR-containing oligonucleotides were compared to those of non-LTR oligonucleotides crystallized in the same lattice. Properties unique to the CA dinucleotide step within the LTR sequence, independent of its position from the end of the duplex, include a positive roll angle and negative slide value. This propensity for the CA dinucleotide step within the MMLV LTR sequence to adopt only positive roll angles is likely influenced by the more rigid, invariable 3' and 5' flanking TT dinucleotide steps and may be important for specific recognition and/or cleavage by the MMLV integrase.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, 635 Barnhill Dr., Indianapolis, IN 46202, USA.


Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Reverse transcriptaseB [auth A]255Moloney murine leukemia virusMutation(s): 0 
Gene Names: POL
Find proteins for P03355 (Moloney murine leukemia virus (isolate Shinnick))
Explore P03355 
Go to UniProtKB:  P03355
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03355
Sequence Annotations
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains LengthOrganismImage
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.25 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.288 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.72α = 90
b = 146.126β = 90
c = 46.863γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-12-12
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Refinement description