2ido: Difference between revisions

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{{STRUCTURE_2ido|  PDB=2ido  |  SCENE=  }}  
{{STRUCTURE_2ido|  PDB=2ido  |  SCENE=  }}  


'''Structure of the E. coli Pol III epsilon-Hot proofreading complex'''
===Structure of the E. coli Pol III epsilon-Hot proofreading complex===




==Overview==
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The epsilon subunit of Escherichia coli DNA polymerase III possesses 3'-exonucleolytic proofreading activity. Within the Pol III core, epsilon is tightly bound between the alpha subunit (DNA polymerase) and subunit. Here, we present the crystal structure of epsilon in complex with HOT, the bacteriophage P1-encoded homolog of , at 2.1 A resolution. The epsilon-HOT interface is defined by two areas of contact: an interaction of the previously unstructured N terminus of HOT with an edge of the epsilon central beta-sheet as well as interactions between HOT and the catalytically important helix alpha1-loop-helix alpha2 motif of epsilon. This structure provides insight into how HOT and, by implication, may stabilize the epsilon subunit, thus promoting efficient proofreading during chromosomal replication.
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{{ABSTRACT_PUBMED_16973612}}


==About this Structure==
==About this Structure==
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[[Category: Pol iii]]
[[Category: Pol iii]]
[[Category: Polymerase]]
[[Category: Polymerase]]
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