MOSAIC STRUCTURE OF LARGE REGIONS OF THE LACTOCOCCUS-LACTIS SUBSP CREMORIS CHROMOSOME

被引：25

作者：

DELORME, C ^{[1
]}

GODON, JJ ^{[1
]}

EHRLICH, SD ^{[1
]}

RENAULT, P ^{[1
]}

机构：

[1] INRA, GENET MICROBIENNE LAB, F-78352 JOUY EN JOSAS, FRANCE

来源：

MICROBIOLOGY-SGM | 1994年 / 140卷

关键词：

LACTOCOCCUS LACTIS SUBSP LACTIS; LACTOCOCCUS LACTIS SUBSP CREMORIS; HORIZONTAL GENE TRANSFER; CHROMOSOME STRUCTURE;

D O I：

10.1099/13500872-140-11-3053

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Lactococcus lactis subsp. lactis and Lactococcus lactis subsp. cremoris are closely related phenotypically and genetically. Here we report that certain regions of their chromosomes diverge considerably more than others. Conserved regions differ by less than 20%, whilst variable regions differ by more than 60%. This mosaic structure may have arisen by horizontal gene transfer from distantly related bacteria since in a particular region of the L. lactis subsp. cremoris chromosome the G+C content and the codon bias are not typical for lactococci. Such an exchange, which conserves the function of the gene and cannot be achieved under selective pressure, may be of considerable importance in the evolution of bacteria.

引用

页码：3053 / 3060

页数：8

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