Yonesaki T
Department of Biology, College of General Education, Osaka University, Japan.
Genetics. 1994 Oct;138(2):247-52. doi: 10.1093/genetics/138.2.247.
Bacteriophage T4 gene 41 encodes a replicative DNA helicase that is a subunit of the primosome which is essential for lagging-strand DNA synthesis. A mutation, rrh, was generated and selected in the helicase gene on the basis of limited DNA replication that ceases early. The survival of ultraviolet-irradiated phage and the frequency of genetic recombination are reduced by rrh. In addition, rrh diminishes the production of concatemeric DNA. These results strongly suggest that the gene 41 replicative helicase participates in DNA recombination.
噬菌体T4基因41编码一种复制性DNA解旋酶,它是引发体的一个亚基,对滞后链DNA合成至关重要。在解旋酶基因中产生并筛选出了一个名为rrh的突变,该突变基于早期停止的有限DNA复制。rrh降低了紫外线照射噬菌体的存活率和基因重组频率。此外,rrh减少了串联DNA的产生。这些结果强烈表明基因41复制性解旋酶参与了DNA重组。