Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 

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This is version 1.2 of the entry. See complete history


Structure of the bacteriophage Mu transposase core: a common structural motif for DNA transposition and retroviral integration.

Rice, P.Mizuuchi, K.

(1995) Cell 82: 209-220

  • DOI: https://doi.org/10.1016/0092-8674(95)90308-9
  • Primary Citation of Related Structures:  
    1BCM, 1BCO

  • PubMed Abstract: 

    The crystal structure of the core domain of bacteriophage Mu transposase, MuA, has been determined at 2.4 A resolution. The first of two subdomains contains the active site and, despite very limited sequence homology, exhibits a striking similarity to the core domain of HIV-1 integrase, which carries out a similar set of biochemical reactions. It also exhibits more limited similarity to other nucleases, RNase H and RuvC. The second, a beta barrel, connects to the first subdomain through several contacts. Three independent determinations of the monomer structure from two crystal forms all show the active site held in a similar, apparently inactive configuration. The enzymatic activity of MuA is known to be activated by formation of a DNA-bound tetramer of the protein. We propose that the connections between the two subdomains may be involved in the cross-talk between the active site and the other domains of the transposase that controls the activity of the protein.

  • Organizational Affiliation

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0540, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
BACTERIOPHAGE MU TRANSPOSASE327Muvirus muMutation(s): 0 
Gene Names: MUA (AMINO ACIDS 248-574)AMup03
EC: 3.1.22 (UniProt), 6.5.1 (UniProt)
Find proteins for P07636 (Escherichia phage Mu)
Explore P07636 
Go to UniProtKB:  P07636
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07636
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.75α = 90
b = 81.08β = 90
c = 161.28γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-10-15
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance