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-Structure paper
タイトル | A combined structural and biochemical approach reveals translocation and stalling of UvrB on the DNA lesion as a mechanism of damage verification in bacterial nucleotide excision repair. |
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ジャーナル・号・ページ | DNA Repair (Amst), Vol. 85, Page 102746, Year 2020 |
掲載日 | 2019年11月6日 |
著者 | Marcin Jaciuk / Paolo Swuec / Vineet Gaur / Joanna M Kasprzak / Ludovic Renault / Mateusz Dobrychłop / Shivlee Nirwal / Janusz M Bujnicki / Alessandro Costa / Marcin Nowotny / |
PubMed 要旨 | Nucleotide excision repair (NER) is a DNA repair pathway present in all domains of life. In bacteria, UvrA protein localizes the DNA lesion, followed by verification by UvrB helicase and excision by ...Nucleotide excision repair (NER) is a DNA repair pathway present in all domains of life. In bacteria, UvrA protein localizes the DNA lesion, followed by verification by UvrB helicase and excision by UvrC double nuclease. UvrA senses deformations and flexibility of the DNA duplex without precisely localizing the lesion in the damaged strand, an element essential for proper NER. Using a combination of techniques, we elucidate the mechanism of the damage verification step in bacterial NER. UvrA dimer recruits two UvrB molecules to its two sides. Each of the two UvrB molecules clamps a different DNA strand using its β-hairpin element. Both UvrB molecules then translocate to the lesion, and UvrA dissociates. The UvrB molecule that clamps the damaged strand gets stalled at the lesion to recruit UvrC. This mechanism allows UvrB to verify the DNA damage and identify its precise location triggering subsequent steps in the NER pathway. |
リンク | DNA Repair (Amst) / PubMed:31739207 |
手法 | EM (単粒子) |
解像度 | 25.0 Å |
構造データ | EMDB-4958: |
由来 |
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