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5-Methyldeoxycytidine enhances the substrate activity of DNA polymerase

Tian Tian1, Shuang Peng, Heng Xiao

  • 1College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei 430072, P. R. China. xzhou@whu.edu.cn srwang@whu.edu.cn.

Chemical Communications (Cambridge, England)
|September 19, 2013
PubMed

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Translesion DNA Polymerases

Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
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Restarting Stalled Replication Forks

DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart, a...
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S-Cdk Initiates DNA Replication02:38

S-Cdk Initiates DNA Replication

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