3ktq

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{{STRUCTURE_3ktq| PDB=3ktq | SCENE= }}
{{STRUCTURE_3ktq| PDB=3ktq | SCENE= }}
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'''CRYSTAL STRUCTURE OF AN ACTIVE TERNARY COMPLEX OF THE LARGE FRAGMENT OF DNA POLYMERASE I FROM THERMUS AQUATICUS'''
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===CRYSTAL STRUCTURE OF AN ACTIVE TERNARY COMPLEX OF THE LARGE FRAGMENT OF DNA POLYMERASE I FROM THERMUS AQUATICUS===
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==Overview==
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The crystal structures of two ternary complexes of the large fragment of Thermus aquaticus DNA polymerase I (Klentaq1) with a primer/template DNA and dideoxycytidine triphosphate, and that of a binary complex of the same enzyme with a primer/template DNA, were determined to a resolution of 2.3, 2.3 and 2.5 A, respectively. One ternary complex structure differs markedly from the two other structures by a large reorientation of the tip of the fingers domain. This structure, designated 'closed', represents the ternary polymerase complex caught in the act of incorporating a nucleotide. In the two other structures, the tip of the fingers domain is rotated outward by 46 degrees ('open') in an orientation similar to that of the apo form of Klentaq1. These structures provide the first direct evidence in DNA polymerase I enzymes of a large conformational change responsible for assembling an active ternary complex.
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{{ABSTRACT_PUBMED_9857206}}
==About this Structure==
==About this Structure==
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[[Category: Large fragement of taq dna polymerase i]]
[[Category: Large fragement of taq dna polymerase i]]
[[Category: Protein/dna]]
[[Category: Protein/dna]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Jul 3 12:52:13 2008''

Revision as of 09:52, 3 July 2008

Image:3ktq.png

Template:STRUCTURE 3ktq

CRYSTAL STRUCTURE OF AN ACTIVE TERNARY COMPLEX OF THE LARGE FRAGMENT OF DNA POLYMERASE I FROM THERMUS AQUATICUS

Template:ABSTRACT PUBMED 9857206

About this Structure

3KTQ is a Single protein structure of sequence from Thermus aquaticus. Full crystallographic information is available from OCA.

Reference

Crystal structures of open and closed forms of binary and ternary complexes of the large fragment of Thermus aquaticus DNA polymerase I: structural basis for nucleotide incorporation., Li Y, Korolev S, Waksman G, EMBO J. 1998 Dec 15;17(24):7514-25. PMID:9857206

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