转化棒状噬菌体β的原噬菌体图谱。
Prophage map of converting corynebacteriophage beta.
作者信息
Laird W, Groman N
出版信息
J Virol. 1976 Jul;19(1):208-19. doi: 10.1128/JVI.19.1.208-219.1976.
Abstract
A prophage map for corynebacteriophage beta consisting of seven markers has been constructed and compared with the vegetative map. The mapping system utilizes heteroimmune double lysogens and capitalizes on the fact that these double lysogens are very unstable and throw off monolysogenic segregants. The prophage map, produced by characterizing the recombinant phage in these monolysogenic segregants, appears to be a cyclic permutation of the vegetative map with the gene for toxin at one end of the prophage map and the gene for phage immunity at the other. This permutation is in accord with the Campbell model for insertion of lambda phage if a site between the toxin and immunity genes in the vegetative map is designated as the phage attachment site. The position of the gene for toxin in the prophage map suggests that converting phages may have originated as specialized transducing phages for this gene.
摘要
已构建了包含七个标记的棒状杆菌噬菌体β原噬菌体图谱，并与营养期图谱进行了比较。该图谱绘制系统利用异源免疫双溶原菌，并利用这些双溶原菌非常不稳定且会产生单溶原菌分离株这一事实。通过对这些单溶原菌分离株中的重组噬菌体进行表征而产生的原噬菌体图谱，似乎是营养期图谱的环状排列，原噬菌体图谱一端是毒素基因，另一端是噬菌体免疫基因。如果将营养期图谱中毒素基因和免疫基因之间的位点指定为噬菌体附着位点，那么这种排列符合λ噬菌体插入的坎贝尔模型。原噬菌体图谱中毒素基因的位置表明，转化噬菌体可能起源于该基因的特异性转导噬菌体。
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