Complete nucleotide sequence of mini-Rts1 and its copy mutant

Author:

Kamio Y,Tabuchi A,Itoh Y,Katagiri H,Terawaki Y

Abstract

The nucleotide sequence of the whole mini-Rts1 genome consisting of 1,855 base pairs was determined. In addition to the cluster of five 24-base-pair direct repeats previously detected (Y. Kamio and Y. Terawaki, J. Bacteriol. 155:1185-1191, 1983), another cluster of three 21-base-pair direct repeats was found. All eight repeats were located in one direction and contained a consensus sequence TTCCCCPyPyPuPuCACACACC. Between the two clusters, a large open reading frame that could encode a 32,980-dalton polypeptide consisting of 288 amino acids was assigned. The molecular size predicted from the amino acid composition was close to the value of a unique mini-Rts1 product, the RepA protein, newly determined in minicells. A copy mutant of mini-Rts1 obtained in vitro by hydroxylamine treatment contained two-base-pair substitutions, one of which was located in the RepA protein coding region, and the other was close to the region where the oriC homologous sequences exist.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

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