1vcc
From Proteopedia
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|SITE= | |SITE= | ||
|LIGAND= | |LIGAND= | ||
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/DNA_topoisomerase DNA topoisomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.99.1.2 5.99.1.2] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA_topoisomerase DNA topoisomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.99.1.2 5.99.1.2] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1vcc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1vcc OCA], [http://www.ebi.ac.uk/pdbsum/1vcc PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1vcc RCSB]</span> | ||
}} | }} | ||
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[[Category: dna binding]] | [[Category: dna binding]] | ||
| - | ''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 00:22:23 2008'' |
Revision as of 21:22, 30 March 2008
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| , resolution 1.6Å | |||||||
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| Activity: | DNA topoisomerase, with EC number 5.99.1.2 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
AMINO TERMINAL 9KDA DOMAIN OF VACCINIA VIRUS DNA TOPOISOMERASE I RESIDUES 1-77, EXPERIMENTAL ELECTRON DENSITY FOR RESIDUES 1-77
Overview
BACKGROUND: Vaccinia virus, a cytoplasmically-replicating poxvirus, encodes a type I DNA topoisomerase that is biochemically similar to eukaryotic-like DNA topoisomerases I, and which has been widely studied as a model topoisomerase. It is the smallest topoisomerase known and is unusual in that it is resistant to the potent chemotherapeutic agent camptothecin. RESULTS: The crystal structure of a 9 kDa amino-terminal fragment of vaccinia virus DNA topoisomerase I has been determined at 1.6 A resolution. The fragment forms a five-stranded, antiparallel beta-sheet with two short alpha-helices and connecting loops. Residues that are conserved between all eukaryotic-like type I topoisomerases are not clustered in particular regions of the structure. CONCLUSIONS: This is the first atomic structure of any region of a eukaryotic-like DNA topoisomerase I. It has provided insights into the structural bases of the phenotypes of some single-site mutants of the intact topoisomerase. The structure has enabled us to study the interactions within a well-folded protein fragment and the camptothecin resistance of the viral topoisomerase.
About this Structure
1VCC is a Single protein structure of sequence from Vaccinia virus. Full crystallographic information is available from OCA.
Reference
Crystal structure of the amino-terminal fragment of vaccinia virus DNA topoisomerase I at 1.6 A resolution., Sharma A, Hanai R, Mondragon A, Structure. 1994 Aug 15;2(8):767-77. PMID:7994576
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