1rh6: Difference between revisions
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[[Image:1rh6.gif|left|200px]] | [[Image:1rh6.gif|left|200px]] | ||
'''Bacteriophage Lambda Excisionase (Xis)-DNA Complex''' | {{Structure | ||
|PDB= 1rh6 |SIZE=350|CAPTION= <scene name='initialview01'>1rh6</scene>, resolution 1.70Å | |||
|SITE= | |||
|LIGAND= | |||
|ACTIVITY= | |||
|GENE= xis ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10710 Enterobacteria phage lambda]) | |||
}} | |||
'''Bacteriophage Lambda Excisionase (Xis)-DNA Complex''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1RH6 is a [ | 1RH6 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Enterobacteria_phage_lambda Enterobacteria phage lambda]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RH6 OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structure of the excisionase-DNA complex from bacteriophage lambda., Sam MD, Cascio D, Johnson RC, Clubb RT, J Mol Biol. 2004 Apr 23;338(2):229-40. PMID:[http:// | Crystal structure of the excisionase-DNA complex from bacteriophage lambda., Sam MD, Cascio D, Johnson RC, Clubb RT, J Mol Biol. 2004 Apr 23;338(2):229-40. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15066428 15066428] | ||
[[Category: Enterobacteria phage lambda]] | [[Category: Enterobacteria phage lambda]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: Johnson, R C.]] | [[Category: Johnson, R C.]] | ||
[[Category: Sam, M D.]] | [[Category: Sam, M D.]] | ||
[[Category: | [[Category: winged -helix protein]] | ||
[[Category: dna architectural protein]] | [[Category: dna architectural protein]] | ||
[[Category: phage excision]] | [[Category: phage excision]] | ||
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[[Category: site-specific dna recombination]] | [[Category: site-specific dna recombination]] | ||
''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 13:51:35 2008'' | ||
Revision as of 14:51, 20 March 2008
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| , resolution 1.70Å | |||||||
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| Gene: | xis (Enterobacteria phage lambda) | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Bacteriophage Lambda Excisionase (Xis)-DNA Complex
OverviewOverview
The excisionase (Xis) protein from bacteriophage lambda is the best characterized member of a large family of recombination directionality factors that control integrase-mediated DNA rearrangements. It triggers phage excision by cooperatively binding to sites X1 and X2 within the phage, bending DNA significantly and recruiting the phage-encoded integrase (Int) protein to site P2. We have determined the co-crystal structure of Xis with its X2 DNA-binding site at 1.7A resolution. Xis forms a unique winged-helix motif that interacts with the major and minor grooves of its binding site using an alpha-helix and an ordered beta-hairpin (wing), respectively. Recognition is achieved through an elaborate water-mediated hydrogen-bonding network at the major groove interface, while the preformed hairpin forms largely non-specific interactions with the minor groove. The structure of the complex provides insights into how Xis recruits Int cooperatively, and suggests a plausible mechanism by which it may distort longer DNA fragments significantly. It reveals a surface on the protein that is likely to mediate Xis-Xis interactions required for its cooperative binding to DNA.
About this StructureAbout this Structure
1RH6 is a Single protein structure of sequence from Enterobacteria phage lambda. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of the excisionase-DNA complex from bacteriophage lambda., Sam MD, Cascio D, Johnson RC, Clubb RT, J Mol Biol. 2004 Apr 23;338(2):229-40. PMID:15066428
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