1im4: Difference between revisions

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[[Image:1im4.jpg|left|200px]]
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[[Image:1im4.png|left|200px]]


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{{STRUCTURE_1im4|  PDB=1im4  |  SCENE=  }}  
{{STRUCTURE_1im4|  PDB=1im4  |  SCENE=  }}  


'''Crystal Structure of a DinB Homolog (DBH) Lesion Bypass DNA Polymerase Catalytic Fragment from Sulfolobus solfataricus'''
===Crystal Structure of a DinB Homolog (DBH) Lesion Bypass DNA Polymerase Catalytic Fragment from Sulfolobus solfataricus===




==Overview==
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The UmuC/DinB family of bypass polymerases is responsible for translesion DNA synthesis and includes the human polymerases eta, iota, and kappa. We determined the 2.3 A resolution crystal structure of a catalytic fragment of the DinB homolog (Dbh) polymerase from Sulfolobus solfataricus and show that it is nonprocessive and can bypass an abasic site. The structure of the catalytic domain is nearly identical to those of most other polymerase families. Homology modeling suggests that there is minimal contact between protein and DNA, that the nascent base pair binding pocket is quite accessible, and that the enzyme is already in a closed conformation characteristic of ternary polymerase complexes. These observations afford insights into the sources of low fidelity and low processivity of the UmuC/DinB polymerases.
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==About this Structure==
==About this Structure==
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[[Category: Processivity]]
[[Category: Processivity]]
[[Category: Thumb]]
[[Category: Thumb]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 13:30:45 2008''

Revision as of 10:30, 1 July 2008

File:1im4.png

Template:STRUCTURE 1im4

Crystal Structure of a DinB Homolog (DBH) Lesion Bypass DNA Polymerase Catalytic Fragment from Sulfolobus solfataricus

Template:ABSTRACT PUBMED 11545744

About this Structure

1IM4 is a Single protein structure of sequence from Sulfolobus solfataricus. Full crystallographic information is available from OCA.

Reference

Crystal structure of a DinB lesion bypass DNA polymerase catalytic fragment reveals a classic polymerase catalytic domain., Zhou BL, Pata JD, Steitz TA, Mol Cell. 2001 Aug;8(2):427-37. PMID:11545744

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