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 

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

  • 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 transpo ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transposon Tn7 transposition protein tnsA
A, B
276Escherichia coliMutation(s): 0 
Gene Names: tnsA
Find proteins for P13988 (Escherichia coli)
Go to UniProtKB:  P13988
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Transposon Tn7 transposition protein tnsC
C, D
54Escherichia coliMutation(s): 0 
Gene Names: tnsC
Find proteins for P05846 (Escherichia coli)
Go to UniProtKB:  P05846
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
MLA
Query on MLA

Download SDF File 
Download CCD File 
A, B, D
MALONIC ACID
DICARBOXYLIC ACID C3; PROPANEDIOLIC ACID; METHANEDICARBOXYLIC ACID
C3 H4 O4
OFOBLEOULBTSOW-UHFFFAOYSA-N
 Ligand Interaction
MPD
Query on MPD

Download SDF File 
Download CCD File 
A, B
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.211 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 156.032α = 90.00
b = 70.112β = 123.61
c = 89.681γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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