| Autor: |
Goryshin IIu, Tamm SE, Lantsov VA |
| Jazyk: |
ruština |
| Zdroj: |
Molekuliarnaia genetika, mikrobiologiia i virusologiia [Mol Gen Mikrobiol Virusol] 1987 Jun (6), pp. 17-23. |
| Abstrakt: |
The number of exconjugants having the transposon Tn5 excised precisely during the crosses of the Escherichia coli proA::Tn5 donor with the recipients F- rec+ or F- recA441 (tif) was 20-30 times higher for the crosses involving the latter recipient. The high recombinogenic activity is characteristic of the tif recipient. Precise excision from a tandem duplication is more efficient than from nonduplicated region of the genome. It is four orders higher, if a transposon is localized in an arm of a duplication. The effect is recA-dependent. The presented data permit us to suggest the participation of RecA protein (its synaptic function) in the formation of the intermediate "stem-loop" structure. The latter is predicted by the three mechanisms of transposon excision: "slippage", "correctional" and "recombinational". The latter two mechanisms were formulated in the paper. The experimental proof of the postexcision transposition presented in the paper, is a good support to the version of "recombinational" excision. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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