2vhg

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{{STRUCTURE_2vhg| PDB=2vhg | SCENE= }}
{{STRUCTURE_2vhg| PDB=2vhg | SCENE= }}
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'''CRYSTAL STRUCTURE OF THE ISHP608 TRANSPOSASE IN COMPLEX WITH RIGHT END 31-MER DNA'''
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===CRYSTAL STRUCTURE OF THE ISHP608 TRANSPOSASE IN COMPLEX WITH RIGHT END 31-MER DNA===
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==Overview==
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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.
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{{ABSTRACT_PUBMED_18243097}}
==About this Structure==
==About this Structure==
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[[Category: Protein-dna comlpex]]
[[Category: Protein-dna comlpex]]
[[Category: Transposition]]
[[Category: Transposition]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 18:49:05 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 14:23:04 2008''

Revision as of 11:23, 28 July 2008

Image:2vhg.png

Template:STRUCTURE 2vhg

CRYSTAL STRUCTURE OF THE ISHP608 TRANSPOSASE IN COMPLEX WITH RIGHT END 31-MER DNA

Template:ABSTRACT PUBMED 18243097

About this Structure

2VHG is a Single protein structure of sequence from Helicobacter pylori. Full crystallographic information is available from OCA.

Reference

Mechanism of IS200/IS605 Family DNA Transposases: Activation and Transposon-Directed Target Site Selection., Barabas O, Ronning DR, Guynet C, Hickman AB, Ton-Hoang B, Chandler M, Dyda F, Cell. 2008 Jan 25;132(2):208-20. PMID:18243097

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