Physical and genetic map of Streptococcus mutans GS-5 and localization of five rRNA operons

被引：5

作者：

Cappiello, MG ^{[1
]}

Hantman, MJ ^{[1
]}

Zuccon, FM ^{[1
]}

Peruzzi, F ^{[1
]}

Amjad, M ^{[1
]}

Piggot, PJ ^{[1
]}

Daneo-Moore, L ^{[1
]}

机构：

[1] Temple Univ, Sch Med, Dept Microbiol & Immunol, Philadelphia, PA 19140 USA

来源：

ORAL MICROBIOLOGY AND IMMUNOLOGY | 1999年 / 14卷 / 04期

关键词：

Streptococcus mutans; physical map; genetic map; rrn operons;

D O I：

10.1034/j.1399-302X.1999.140405.x

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

The physical map of the 2.1 megabase chromosome of Streptococcus mutans GS-5 has been refined by including all ApaI and SmaI fragments of 5 kbp or greater, and by positioning the fragments generated by the endonuclease I-CeuI. Sixty-three new genetic loci have been added to the map, so that it now contains 90 loci. The new loci include those for 35 cloned streptococcal genes of established function and for 23 S. mutans genes of putative function. In addition, five rm operons were identified and placed on the map of the chromosome. The presence of a SmaI site in each of the rrn operons allowed the direction of transcription of each operon to be deduced. The orientation of the rrn loci indicates that their transcription is directed away from a small region of the chromosome, identifying a possible region for the initiation of chromosome replication.

引用

页码：225 / 232

页数：8

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