海洋噬藻体P60的基因组序列与进化：对裂解性和溶源性噬菌体的新见解
Genomic sequence and evolution of marine cyanophage P60: a new insight on lytic and lysogenic phages.
作者信息
Chen Feng, Lu Jingrang
机构信息
Center of Marine Biotechnology, University of Maryland Biotechnology Institute, Baltimore, Maryland 21202, USA.
出版信息
Appl Environ Microbiol. 2002 May;68(5):2589-94. doi: 10.1128/AEM.68.5.2589-2594.2002.
Abstract
The genome of cyanophage P60, a lytic virus which infects marine Synechococcus WH7803, was completely sequenced. The P60 genome contained 47,872 bp with 80 potential open reading frames that were mostly similar to the genes found in lytic phages like T7, phi-YeO3-12, and SIO1. The DNA replication system, consisting of primase-helicase and DNA polymerase, appeared to be more conserved in podoviruses than in siphoviruses and myoviruses, suggesting that DNA replication genes could be the critical elements for lytic phages. Strikingly high sequence similarities in the regions coding for nucleotide metabolism were found between cyanophage P60 and marine unicellular cyanobacteria.
摘要
噬菌体P60是一种可感染海洋聚球藻WH7803的裂解性病毒，其基因组已被完全测序。P60基因组含有47,872个碱基对，有80个潜在的开放阅读框，这些阅读框大多与T7、phi-YeO3-12和SIO1等裂解性噬菌体中的基因相似。由引发酶-解旋酶和DNA聚合酶组成的DNA复制系统在短尾噬菌体中似乎比在长尾噬菌体和肌尾噬菌体中更保守，这表明DNA复制基因可能是裂解性噬菌体的关键元件。在噬菌体P60和海洋单细胞蓝细菌之间，发现核苷酸代谢编码区域存在惊人的高序列相似性。
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