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用于分离大肠杆菌6-磷酸葡萄糖酸脱氢酶(gnd)的特异性转导噬菌体。

Isolation of specialized transducing bacteriophages for gluconate 6-phosphate dehydrogenase (gnd) of Escherichia coli.

作者信息

Wolf R E, Fraenkel D G

出版信息

J Bacteriol. 1974 Feb;117(2):468-76. doi: 10.1128/jb.117.2.468-476.1974.

Abstract

Specialized transducing phages for gluconate 6-phosphate dehydrogenase (gnd), a constitutive enzyme in Escherichia coli, have been isolated using a method previously described for other genes. The gnd-his region, carried on an F' episome, was first transposed to tonB. Rare phages carrying gnd were selected, by transduction, from phi80 lysogens of these strains; one phage also carried his (phi80gndhis). From the transductants, high-frequency transducing lysates were obtained; low multiplicity of infection then yielded defective lysogens. tonB deletion analysis of the phi80dgndhis lysogen shows the order of genes in the prophage to be imm80...hisOGD...gnd; according to a marker rescue experiment most phage late genes have been replaced by bacterial deoxyribonucleic acid. A heat-inducible, lysis-defective lambda-phi80 hybrid derivative of phi80dgndhis has been prepared.

摘要

已使用先前针对其他基因描述的方法,分离出了用于葡萄糖酸6 - 磷酸脱氢酶(gnd,大肠杆菌中的一种组成型酶)的特异性转导噬菌体。携带在F'附加体上的gnd - his区域首先被转座到tonB。通过转导从这些菌株的φ80溶原菌中筛选出携带gnd的稀有噬菌体;其中一个噬菌体还携带his(φ80gndhis)。从转导子中获得了高频转导裂解物;低感染复数随后产生了缺陷溶原菌。对φ80dgndhis溶原菌的tonB缺失分析表明原噬菌体中基因的顺序为imm80...hisOGD...gnd;根据标记拯救实验,大多数噬菌体晚期基因已被细菌脱氧核糖核酸取代。已制备了φ80dgndhis的热诱导、裂解缺陷型λ - φ80杂交衍生物。

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