2a6o
From Proteopedia
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|PDB= 2a6o |SIZE=350|CAPTION= <scene name='initialview01'>2a6o</scene>, resolution 2.60Å | |PDB= 2a6o |SIZE=350|CAPTION= <scene name='initialview01'>2a6o</scene>, resolution 2.60Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=DA:2'-DEOXYADENOSINE-5'-MONOPHOSPHATE'>DA</scene>, <scene name='pdbligand=DC:2'-DEOXYCYTIDINE-5'-MONOPHOSPHATE'>DC</scene>, <scene name='pdbligand=DG:2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE'>DG</scene>, <scene name='pdbligand=DT:THYMIDINE-5'-MONOPHOSPHATE'>DT</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[2a6m|2A6M]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2a6o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a6o OCA], [http://www.ebi.ac.uk/pdbsum/2a6o PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2a6o RCSB]</span> | ||
}} | }} | ||
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[[Category: rna recognition motif]] | [[Category: rna recognition motif]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 01:48:33 2008'' |
Revision as of 22:48, 30 March 2008
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| , resolution 2.60Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , , | ||||||
| Related: | 2A6M
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure of the ISHp608 Transposase in Complex with Stem-loop DNA
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
2A6O 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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