A euryarchaeal histone modulates strand displacement synthesis by replicative DNA polymerases
A euryarchaeal histone modulates strand displacement synthesis by replicative DNA polymerases
复制标题
广古菌组蛋白通过复制 DNA 聚合酶调节链置换合成
DOI:
10.1007/s11427-016-5076-8
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发表时间:
2016-06
影响因子:
9.1
通讯作者:
Huang, Li
中科院分区:
文献类型:
--
作者:
Sun, Fei;Huang, Li
Euryarchaeota and Crenarchaeota, the two main lineages of the domain Archaea, encode different chromatin proteins and differ in the use of replicative DNA polymerases. Crenarchaea possess a single family B DNA polymerase (PolB), which is capable of strand displacement modulated by the chromatin proteins Cren7 and Sul7d. Euryarchaea have two distinct replicative DNA polymerases, PolB and PolD, a family D DNA polymerase. Here we characterized the strand displacement activities of PolB and PolD from the hyperthermophilic euryarchaeonPyrococcus furiosusand investigated the influence of HPfA1, a homolog of eukaryotic histones fromP. furiosus, on these activities. We showed that both PolB and PolD were efficient in strand displacement. HPfA1 inhibited DNA strand displacement by both DNA polymerases but exhibited little effect on the displacement of a RNA strand annealed to single-stranded template DNA. This is consistent with the finding that HPfA1 bound more tightly to double-stranded DNA than to a RNA:DNA hybrid. Our results suggest that, although crenarchaea and euryarchaea differ in chromosomal packaging, they share similar mechanisms in modulating strand displacement by DNA polymerases during lagging strand DNA synthesis.
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