1T0F

Crystal Structure of the TnsA/TnsC(504-555) complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

The carboxy-terminal portion of TnsC activates the Tn7 transposase through a specific interaction with TnsA.

Ronning, D.R.Li, Y.Perez, Z.N.Ross, P.D.Hickman, A.B.Craig, N.L.Dyda, F.

(2004) EMBO J 23: 2972-2981

  • DOI: 10.1038/sj.emboj.7600311
  • Primary Citation of Related Structures:  
    1T0F

  • PubMed Abstract: 
  • Tn7 transposition requires the assembly of a nucleoprotein complex containing four self-encoded proteins, transposon ends, and target DNA. Within this complex, TnsC, the molecular switch that regulates transposition, and TnsA, one part of the transposase, interact directly ...

    Tn7 transposition requires the assembly of a nucleoprotein complex containing four self-encoded proteins, transposon ends, and target DNA. Within this complex, TnsC, the molecular switch that regulates transposition, and TnsA, one part of the transposase, interact directly. Here, we demonstrate that residues 504-555 of TnsC are responsible for TnsA/TnsC interaction. The crystal structure of the TnsA/TnsC(504-555) complex, resolved to 1.85 A, illustrates the burial of a large hydrophobic patch on the surface of TnsA. One consequence of sequestering this patch is a marked increase in the thermal stability of TnsA as shown by differential scanning calorimetry. A model based on the complex structure suggested that TnsA and a slightly longer version of the cocrystallized TnsC fragment (residues 495-555) might cooperate to bind DNA, a prediction confirmed using gel mobility shift assays. Donor DNA binding by the TnsA/TnsC(495-555) complex is correlated with the activation of the TnsAB transposase, as measured by double-stranded DNA cleavage assays, demonstrating the importance of the TnsA/TnsC interaction in affecting Tn7 transposition.


    Related Citations: 
    • Unexpected structural diversity in DNA recombination: the restriction endonuclease connection.
      Hickman, A.B., Li, Y., Mathew, S.V., May, E.W., Craig, N.L., Dyda, F.
      (2000) Mol Cell 5: 1025

    Organizational Affiliation

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transposon Tn7 transposition protein tnsAA, B276Escherichia coliMutation(s): 0 
Gene Names: tnsA
Find proteins for P13988 (Escherichia coli)
Explore P13988 
Go to UniProtKB:  P13988
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Transposon Tn7 transposition protein tnsCC, D54Escherichia coliMutation(s): 0 
Gene Names: tnsC
Find proteins for P05846 (Escherichia coli)
Explore P05846 
Go to UniProtKB:  P05846
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 156.032α = 90
b = 70.112β = 123.61
c = 89.681γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-11-09
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2014-09-10
    Changes: Database references
  • Version 1.4: 2015-04-29
    Changes: Non-polymer description
  • Version 1.5: 2017-12-20
    Changes: Database references