Iordănescu S
J Bacteriol. 1977 Jan;129(1):71-5. doi: 10.1128/jb.129.1.71-75.1977.
Cotransduction of two or even three plasmids was observed when a Staphylococcus aureus strain, carrying five distinct, compatible plasmids, was used as donor. An active host recombination system did not seem to be indispensable for plasmid cotransduction, since RecA+ and RecA- donors gave similar cotransduction frequencies. Analysis of plasmids carried by cotransductant clones demonstrated that a genetic interaction can take place between cotransduced plasmids, leading to new plasmids. Some of the properties of these new plasmids are discussed. Another set of experiments tested the ability of a cotransducible plasmid to allow a significant degree of multiplication of a temperature-sensitive plasmid at restrictive temperature. In an attempt to explain the results obtained, a working hypothesis suggesting a transient and reversible association of cotransducible plasmids is presented.
当使用携带五种不同的相容性质粒的金黄色葡萄球菌菌株作为供体时,观察到了两种甚至三种质粒的共转导现象。由于RecA +和RecA -供体的共转导频率相似,因此活跃的宿主重组系统似乎并非质粒共转导所必需的。对共转导克隆所携带的质粒进行分析表明,共转导的质粒之间可以发生遗传相互作用,从而产生新的质粒。文中讨论了这些新质粒的一些特性。另一组实验测试了共转导质粒在限制温度下使温度敏感型质粒大量增殖的能力。为了解释所获得的结果,本文提出了一个工作假说,该假说认为共转导质粒之间存在瞬时且可逆的关联。