کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8456715 | 1548750 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Error-free DNA-damage tolerance in Saccharomyces cerevisiae
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
تحقیقات سرطان
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چکیده انگلیسی
DNA-damage tolerance (DDT) is an important mechanism for living cells to bypass replication blocks on the template strand. In Saccharomyces cerevisiae, DDT is mediated by the RAD6 epistasis group of genes, consisting of two parallel pathways: error-prone translesion DNA synthesis (TLS), and error-free lesion bypass. The two pathways are activated by sequential ubiquitination of PCNA on the Lys164 residue. When a replication fork is stalled at a lesion, PCNA is first monoubiquitinated by Rad6-Rad18, which leads to the TLS pathway. The subsequent ubiquitination by the Mms2-Ubc13-Rad5 complex on the monoubiquitinated PCNA is to form a Lys63-linked polyubiquitin chain that promotes error-free lesion bypass. While the TLS pathway has been extensively characterized, the molecular events leading to error-free lesion bypass by polyubiquitinated PCNA are largely obscure. Furthermore, PCNA can also be sumoylated at the same Lys164 residue, which helps to recruit Srs2, a helicase and anti-recombinase. This review summarizes recent advances in our understanding of error-free DDT and its interplay with Srs2 and homologous recombination.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mutation Research/Reviews in Mutation Research - Volume 764, AprilâJune 2015, Pages 43-50
Journal: Mutation Research/Reviews in Mutation Research - Volume 764, AprilâJune 2015, Pages 43-50
نویسندگان
Xin Xu, Susan Blackwell, Aiyang Lin, Fangfang Li, Zhoushuai Qin, Wei Xiao,