Kiss G B, Dobo K, Dusha I, Breznovits A, Orosz L, Vincze E, Kondorosi A
J Bacteriol. 1980 Jan;141(1):121-8. doi: 10.1128/jb.141.1.121-128.1980.
Using a simple enrichment procedure, we isolated an R-prime derivative of plasmid R68.45 carrying a 17.8-megadalton segment of the Rhizobium meliloti 41 chromosome. The chromosomal segment carried on this plasmid (pGY1) includes the markers cys-24+, cys-46+, and att16-3. Plasmid pGY1 mobilized the chromosome in a polarized way starting from the region of homology, but cannot promote chromosome transfer from other sites. The att16-3 site on pGY1 allowed the integration of phage 16-3 into pGY1, and a composite plasmid of 91.8 megadaltons was formed. This vector (pGY2) is suitable for the introduction of Rhizobium bacteriophage 16-3 into other gram-negative bacteria.
通过一种简单的富集程序,我们分离出了质粒R68.45的一个R-prime衍生物,它携带了苜蓿根瘤菌41染色体的一个17.8兆道尔顿片段。此质粒(pGY1)上携带的染色体片段包括标记cys-24+、cys-46+和att16-3。质粒pGY1从同源区域开始以极化方式动员染色体,但不能促进从其他位点进行染色体转移。pGY1上的att16-3位点允许噬菌体16-3整合到pGY1中,从而形成了一个91.8兆道尔顿的复合质粒。该载体(pGY2)适用于将苜蓿根瘤菌噬菌体16-3导入其他革兰氏阴性细菌。