1fzr: Difference between revisions

Revision as of 16:56, 2 May 2008

CRYSTAL STRUCTURE OF BACTERIOPHAGE T7 ENDONUCLEASE I

OverviewOverview

We have solved the crystal structure of the Holliday junction resolving enzyme T7 endonuclease I at 2.1 A resolution using the multiwavelength anomalous dispersion (MAD) technique. Endonuclease I exhibits strong structural specificity for four-way DNA junctions. The structure shows that it forms a symmetric homodimer arranged in two well-separated domains. Each domain, however, is composed of elements from both subunits, and amino acid side chains from both protomers contribute to the active site. While no significant structural similarity could be detected with any other junction resolving enzyme, the active site is similar to that found in several restriction endonucleases. T7 endonuclease I therefore represents the first crystal structure of a junction resolving enzyme that is a member of the nuclease superfamily of enzymes.

About this StructureAbout this Structure

1FZR is a Single protein structure of sequence from Enterobacteria phage t7. Full crystallographic information is available from OCA.

ReferenceReference

Crystal structure of the Holliday junction resolving enzyme T7 endonuclease I., Hadden JM, Convery MA, Declais AC, Lilley DM, Phillips SE, Nat Struct Biol. 2001 Jan;8(1):62-7. PMID:11135673 Page seeded by OCA on Fri May 2 16:56:58 2008

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OCA

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 [[Image:1fzr.gif|left|200px]]
- {{Structure
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-|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Deoxyribonuclease_IV_(phage-T(4)-induced) Deoxyribonuclease IV (phage-T(4)-induced)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.21.2 3.1.21.2] </span>
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-|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1fzr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fzr OCA], [http://www.ebi.ac.uk/pdbsum/1fzr PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1fzr RCSB]</span>
-}}
 '''CRYSTAL STRUCTURE OF BACTERIOPHAGE T7 ENDONUCLEASE I'''
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 ==Reference==
 Crystal structure of the Holliday junction resolving enzyme T7 endonuclease I., Hadden JM, Convery MA, Declais AC, Lilley DM, Phillips SE, Nat Struct Biol. 2001 Jan;8(1):62-7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11135673 11135673]
-[[Category: Deoxyribonuclease IV (phage-T(4)-induced)]]
 [[Category: Enterobacteria phage t7]]
 [[Category: Single protein]]
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 [[Category: Lilley, D M.J.]]
 [[Category: Phillips, S E.V.]]
-[[Category: composite active site]]
+[[Category: Composite active site]]
-[[Category: domain swapped]]
+[[Category: Domain swapped]]
-[[Category: holliday junction resolvase]]
+[[Category: Holliday junction resolvase]]
-[[Category: homodimer]]
+[[Category: Homodimer]]
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 16:56:58 2008''
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:33:31 2008''