2a6m
From Proteopedia
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| - | [[Image:2a6m.gif|left|200px]] | + | [[Image:2a6m.gif|left|200px]] |
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| - | '''Crystal Structure of the ISHp608 Transposase''' | + | {{Structure |
| + | |PDB= 2a6m |SIZE=350|CAPTION= <scene name='initialview01'>2a6m</scene>, resolution 2.40Å | ||
| + | |SITE= | ||
| + | |LIGAND= | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
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| + | '''Crystal Structure of the ISHp608 Transposase''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 2A6M is a [ | + | 2A6M is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Helicobacter_pylori Helicobacter pylori]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A6M OCA]. |
==Reference== | ==Reference== | ||
| - | Active site sharing and subterminal hairpin recognition in a new class of DNA transposases., Ronning DR, Guynet C, Ton-Hoang B, Perez ZN, Ghirlando R, Chandler M, Dyda F, Mol Cell. 2005 Oct 7;20(1):143-54. PMID:[http:// | + | Active site sharing and subterminal hairpin recognition in a new class of DNA transposases., Ronning DR, Guynet C, Ton-Hoang B, Perez ZN, Ghirlando R, Chandler M, Dyda F, Mol Cell. 2005 Oct 7;20(1):143-54. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16209952 16209952] |
[[Category: Helicobacter pylori]] | [[Category: Helicobacter pylori]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: rna recognition motif]] | [[Category: rna recognition motif]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 15:46:01 2008'' |
Revision as of 13:46, 20 March 2008
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| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure of the ISHp608 Transposase
Overview
Many bacteria harbor simple transposable elements termed insertion sequences (IS). In Helicobacter pylori, the chimeric IS605 family elements are particularly interesting due to their proximity to genes encoding gastric epithelial invasion factors. Protein sequences of IS605 transposases do not bear the hallmarks of other well-characterized transposases. We have solved the crystal structure of full-length transposase (TnpA) of a representative member, ISHp608. Structurally, TnpA does not resemble any characterized transposase; rather, it is related to rolling circle replication (RCR) proteins. Consistent with RCR, Mg2+ and a conserved tyrosine, Tyr127, are essential for DNA nicking and the formation of a covalent intermediate between TnpA and DNA. TnpA is dimeric, contains two shared active sites, and binds two DNA stem loops representing the conserved inverted repeats near each end of ISHp608. The cocrystal structure with stem-loop DNA illustrates how this family of transposases specifically recognizes and pairs ends, necessary steps during transposition.
About this Structure
2A6M is a Single protein structure of sequence from Helicobacter pylori. Full crystallographic information is available from OCA.
Reference
Active site sharing and subterminal hairpin recognition in a new class of DNA transposases., Ronning DR, Guynet C, Ton-Hoang B, Perez ZN, Ghirlando R, Chandler M, Dyda F, Mol Cell. 2005 Oct 7;20(1):143-54. PMID:16209952
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