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Title: Mechanism of DNA Lesion Homing and Recognition by the Uvr Nucleotide Excision Repair System

Journal Article · · Research
ORCiD logo [1];  [2];  [3]
  1. Harvard Univ., Cambridge, MA (United States). Dept. of Stem Cell and Regenerative Biology
  2. Harvard Univ., Cambridge, MA (United States). Dept. of Molecular and Cellular Biology
  3. Harvard Univ., Cambridge, MA (United States). Dept. of Stem Cell and Regenerative Biology. Dept. of Molecular and Cellular Biology. Dept. of Chemistry and Chemical Biology

Nucleotide excision repair (NER) is an essential DNA repair system distinguished from other such systems by its extraordinary versatility. NER removes a wide variety of structurally dissimilar lesions having only their bulkiness in common. NER can also repair several less bulky nucleobase lesions, such as 8-oxoguanine. Thus, how a single DNA repair system distinguishes such a diverse array of structurally divergent lesions from undamaged DNA has been one of the great unsolved mysteries in the field of genome maintenance. Here we employ a synthetic crystallography approach to obtain crystal structures of the pivotal NER enzyme UvrB in complex with duplex DNA, trapped at the stage of lesion-recognition. These structures coupled with biochemical studies suggest that UvrB integrates the ATPase-dependent helicase/translocase and lesion-recognition activities. Our work also conclusively establishes the identity of the lesion-containing strand and provides a compelling insight to how UvrB recognizes a diverse array of DNA lesions.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC)
OSTI ID:
1837249
Journal Information:
Research, Journal Name: Research Vol. 2019; ISSN 2639-5274
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

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