大肠杆菌中复制起点附近的脱氧核糖核酸与膜的相互作用及脱氧核糖核酸合成的起始
Deoxyribonucleic acid-membrane interactions near the origin of replication and initiation of deoxyribonucleic acid synthesis in Escherichia coli.
作者信息
Craine B L, Rupert C S
出版信息
J Bacteriol. 1979 Feb;137(2):740-5. doi: 10.1128/jb.137.2.740-745.1979.
Abstract
A previously reported salt-sensitive binding of deoxyribonucleic acid (DNA) to the cell envelope in Escherichia coli, involving approximately one site per chromosome near the origin of DNA replication, is rapidly disrupted in vivo by rifampin or chloramphenicol treatment and by amino acid starvation. DNA replication still initiates with this origin-specific binding disrupted, even when the disruption extends over the period of obligatory protein and ribonucleic acid synthesis that must precede initiation after release of cells from amino acid starvation. Thus the origin-associated membrane-DNA interaction is not necessary either for the initiation event itself or for the maturation of a putative initiation apparatus in E. coli.
摘要
先前报道的大肠杆菌中脱氧核糖核酸（DNA）与细胞膜的盐敏感结合，涉及每个染色体在DNA复制起点附近约一个位点，在体内经利福平或氯霉素处理以及氨基酸饥饿后会迅速被破坏。即使这种破坏持续到从氨基酸饥饿中释放细胞后启动复制所必需的蛋白质和核糖核酸合成阶段，DNA复制仍会在这种起点特异性结合被破坏的情况下起始。因此，在大肠杆菌中，与起点相关的膜-DNA相互作用对于起始事件本身或假定起始装置的成熟都不是必需的。
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