TY - JOUR A2 - Iwai, Shigenori AU - Takezawa, Jun AU - Ishimi, Yukio AU - Aiba, Naomi AU - Yamada, Kouichi PY - 2010 DA - 2010/12/01 TI - Rev1, Rev3, or Rev7 siRNA Abolishes Ultraviolet Light-Induced Translesion Replication in HeLa Cells: A Comprehensive Study Using Alkaline Sucrose Density Gradient Sedimentation SP - 750296 VL - 2010 AB - When a replicative DNA polymerase stalls upon encountering a lesion on the template strand, it is relieved by other low-processivity polymerase(s), which insert nucleotide(s) opposite the lesion, extend by a few nucleotides, and dissociate from the 3′-OH. The replicative polymerase then resumes DNA synthesis. This process, termed translesion replication (TLS) or replicative bypass, may involve at least five different polymerases in mammals, although the participating polymerases and their roles have not been entirely characterized. Using siRNAs originally designed and an alkaline sucrose density gradient sedimentation technique, we verified the involvement of several polymerases in ultraviolet (UV) light-induced TLS in HeLa cells. First, siRNAs to Rev3 or Rev7 largely abolished UV-TLS, suggesting that these 2 gene products, which comprise Pol ζ,麦n role in mutagenic TLS. Second, Rev1-targeted siRNA also abrogated UV-TLS, indicating that Rev1 is also indispensable to mutagenic TLS. Third, Pol η-targeted siRNA also prevented TLS to a greater extent than our expectations. Forth, although siRNA to Pol ι没有可检测的影响,波尔吗 κdelayed UV-TLS. To our knowledge, this is the first study reporting apparent evidence for the participation of Pol κin UV-TLS. SN - 2090-0201 UR - https://doi.org/10.4061/2010/750296 DO - 10.4061/2010/750296 JF - Journal of Nucleic Acids PB - SAGE-Hindawi Access to Research KW - ER -