枯草芽孢杆菌168连锁图谱的修订：染色体呈环状的证据
Revision of the linkage map of Bacillus subtilis 168: indications for circularity of the chromosome.
作者信息
Lepesant-Kejzlarová J, Lepesant J A, Walle J, Billault A, Dedonder R
出版信息
J Bacteriol. 1975 Mar;121(3):823-34. doi: 10.1128/jb.121.3.823-834.1975.
Abstract
A revision of the linkage map of the Bacillus subtilis 168 chromosome has been undertaken with the use of the generalized transducing phage PBS1. The mapping of four new markers (narB1, mtlB1, aroI906, and tre-12) has allowed a determination of the relative orientation of the purB-dal segment and its linkage with the lin markers. The chromosomal segment comprised between the sacQ36 and gtaA12 markers has been linked with the narA1, ctrA1, and sacA321 markers. The recA1 marker has been mapped relative to the thyA and citB17 markers. Indications of linkage have been found between the tre-12 and catA markers and the aroG932 and sacQ36 markers. According to these results, a circular genetic map of the chromosome of B. subtilis 168 is presented. Taken together, the transduction data and the order of marker replication determined by Harford in the accompanying paper support strongly the hypothesis of a symmetrical and fully bidirectional mode of replication for the B. subtilis 168 chromosome.
摘要
利用广义转导噬菌体PBS1对枯草芽孢杆菌168染色体的连锁图谱进行了修订。四个新标记（narB1、mtlB1、aroI906和tre-12）的定位使得能够确定purB-dal区段的相对方向及其与lin标记的连锁关系。位于sacQ36和gtaA12标记之间的染色体区段已与narA1、ctrA1和sacA321标记连锁。recA1标记已相对于thyA和citB17标记进行了定位。已发现tre-12与catA标记以及aroG932与sacQ36标记之间存在连锁迹象。根据这些结果，给出了枯草芽孢杆菌168染色体的环状遗传图谱。综合来看，转导数据以及哈福德在随附论文中确定的标记复制顺序有力地支持了枯草芽孢杆菌168染色体对称且完全双向复制模式的假设。
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