1TNS

A NOVEL CLASS OF WINGED HELIX-TURN-HELIX PROTEIN: THE DNA-BINDING DOMAIN OF MU TRANSPOSASE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

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This is version 1.4 of the entry. See complete history


Literature

A novel class of winged helix-turn-helix protein: the DNA-binding domain of Mu transposase.

Clubb, R.T.Omichinski, J.G.Savilahti, H.Mizuuchi, K.Gronenborn, A.M.Clore, G.M.

(1994) Structure 2: 1041-1048

  • DOI: https://doi.org/10.1016/s0969-2126(94)00107-3
  • Primary Citation of Related Structures:  
    1TNS, 1TNT

  • PubMed Abstract: 

    Mu transposase (MuA) is a multidomain protein encoded by the bacteriophage Mu genome. It is responsible for translocation of the Mu genome, which is the largest and most efficient transposon known. While the various domains of MuA have been delineated by means of biochemical methods, no data have been obtained to date relating to its tertiary structure. We have solved the three-dimensional solution structure of the DNA-binding domain (residues 1-76; MuA76) of MuA by multidimensional heteronuclear NMR spectroscopy. The structure consists of a three-membered alpha-helical bundle buttressed by a three-stranded antiparallel beta-sheet. Helices H1 and H2 and the seven-residue turn connecting them comprise a helix-turn-helix (HTH) motif. In addition, there is a long nine-residue flexible loop or wing connecting strands B2 and B3 of the sheet. NMR studies of MuA76 complexed with a consensus DNA site from the internal activation region of the Mu genome indicate that the wing and the second helix of the HTH motif are significantly perturbed upon DNA binding. While the general appearance of the DNA-binding domain of MuA76 is similar to that of other winged HTH proteins, the connectivity of the secondary structure elements is permuted. Hence, the fold of MuA76 represents a novel class of winged HTH DNA-binding domain.


  • Organizational Affiliation

    Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MU-TRANSPOSASE76Muvirus muMutation(s): 0 
EC: 6.5.1 (UniProt), 3.1.22 (UniProt)
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
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-02-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-02
    Changes: Database references, Derived calculations, Other, Structure summary
  • Version 1.4: 2024-05-22
    Changes: Data collection