Chakrabarty A M, Gunsalus I C
Proc Natl Acad Sci U S A. 1969 Dec;64(4):1217-23. doi: 10.1073/pnas.64.4.1217.
The transfer of transducing phage DNA in association with the mandelate genetic region of Pseudomonas putida strain PRS1 (termed pfdm) has been achieved by growing together mandelate-positive PpG2 cells harboring pfdm as an extrachromosomal element and mandelate-deleted PpG1 strains. This transfer is analogous to sexual conjugation in the enterobacteria. The transfer of pfdm elements is always associated with chromosome mobilization and some rare recombinants acquire genetic donor ability. We have therefore concluded that the pfdm elements are responsible for initiation of chromosome mobilization in a manner not yet fully understood.
通过将携带作为染色体外元件的pfdm的扁桃酸盐阳性PpG2细胞与缺失扁桃酸盐的PpG1菌株共同培养,实现了转导噬菌体DNA与恶臭假单胞菌PRS1菌株(称为pfdm)的扁桃酸盐遗传区域相关的转移。这种转移类似于肠杆菌中的有性接合。pfdm元件的转移总是与染色体动员相关,一些罕见的重组体获得遗传供体能力。因此,我们得出结论,pfdm元件以一种尚未完全理解的方式负责启动染色体动员。