1cy2: Difference between revisions

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[[Image:1cy2.gif|left|200px]]
{{Seed}}
[[Image:1cy2.png|left|200px]]


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{{STRUCTURE_1cy2|  PDB=1cy2  |  SCENE=  }}  
{{STRUCTURE_1cy2|  PDB=1cy2  |  SCENE=  }}  


'''COMPLEX OF E.COLI DNA TOPOISOMERASE I WITH TPTPTP3''''
===COMPLEX OF E.COLI DNA TOPOISOMERASE I WITH TPTPTP3'===




==Overview==
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DNA topoisomerases are the enzymes responsible for controlling and maintaining the topological states of DNA. Type IA enzymes work by transiently breaking the phosphodiester backbone of one strand to allow passage of another strand through the break. The protein has to perform complex rearrangements of the DNA, and hence it is likely that different regions of the enzyme bind DNA with different affinities. In order to identify some of the DNA binding sites in the protein, we have solved the structures of several complexes of the 67 kDa N-terminal fragment of Escherichia coli DNA topoisomerase I with mono- and trinucleotides. There are five different binding sites in the complexes, one of which is adjacent to the active site. Two other sites are in the central hole of the protein and may represent general DNA binding regions. The positions of these sites allow us to identify different DNA binding regions and to understand their possible roles in the catalytic cycle.
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{{ABSTRACT_PUBMED_10504732}}


==About this Structure==
==About this Structure==
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[[Category: Dna topoisomerase]]
[[Category: Dna topoisomerase]]
[[Category: Relaxing enzyme]]
[[Category: Relaxing enzyme]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 13:14:07 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 21:45:43 2008''

Revision as of 18:45, 30 June 2008

File:1cy2.png

Template:STRUCTURE 1cy2

COMPLEX OF E.COLI DNA TOPOISOMERASE I WITH TPTPTP3'

Template:ABSTRACT PUBMED 10504732

About this Structure

1CY2 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Protein-nucleotide interactions in E. coli DNA topoisomerase I., Feinberg H, Changela A, Mondragon A, Nat Struct Biol. 1999 Oct;6(10):961-8. PMID:10504732

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