2VIH

CRYSTAL STRUCTURE OF THE IS608 TRANSPOSASE IN COMPLEX WITH Left END 26-MER DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Mechanism of is200/is605 Family DNA Transposases: Activation and Transposon-Directed Target Site Selection.

Barabas, O.Ronning, D.R.Guynet, C.Hickman, A.B.Ton-Hoang, B.Chandler, M.Dyda, F.

(2008) Cell 132: 208

  • DOI: 10.1016/j.cell.2007.12.029
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The smallest known DNA transposases are those from the IS200/IS605 family. Here we show how the interplay of protein and DNA activates TnpA, the Helicobacter pylori IS608 transposase, for catalysis. First, transposon end binding causes a conformation ...

    The smallest known DNA transposases are those from the IS200/IS605 family. Here we show how the interplay of protein and DNA activates TnpA, the Helicobacter pylori IS608 transposase, for catalysis. First, transposon end binding causes a conformational change that aligns catalytically important protein residues within the active site. Subsequent precise cleavage at the left and right ends, the steps that liberate the transposon from its donor site, does not involve a site-specific DNA-binding domain. Rather, cleavage site recognition occurs by complementary base pairing with a TnpA-bound subterminal transposon DNA segment. Thus, the enzyme active site is constructed from elements of both protein and DNA, reminiscent of the interdependence of protein and RNA in the ribosome. Our structural results explain why the transposon ends are asymmetric and how the transposon selects a target site for integration, and they allow us to propose a molecular model for the entire transposition reaction.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSPOSASE ORFA
A, B
159Helicobacter pyloriMutation(s): 0 
N/A
Find proteins for Q933Z0 (Helicobacter pylori)
Go to UniProtKB:  Q933Z0
Entity ID: 2
MoleculeChainsLengthOrganism
5'-D(*AP*AP*AP*GP*CP*CP*CP*CP*TP*AP *GP*CP*TP*TP*TP*TP*AP*GP*CP*TP*AP*TP*GP*GP*GP*G)-3'C,D26Helicobacter pylori
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.225 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 73.482α = 90.00
b = 50.287β = 105.74
c = 115.554γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
AMoREphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-02-19
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance