Genetic diversity in the lactose operons of Lactobacillus helveticus strains and its relationship to the role of these strains as commercial starter cultures

被引：16

作者：

Callanan, MJ ^{[1
]}

Beresford, TP ^{[1
]}

Ross, RP ^{[1
]}

机构：

[1] TEAGASC, Dairy Prod Res Ctr, Cork, Ireland

来源：

APPLIED AND ENVIRONMENTAL MICROBIOLOGY | 2005年 / 71卷 / 03期

关键词：

D O I：

10.1128/AEM.71.3.1655-1658.2005

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Two novel insertion sequence elements, ISLhe1 and ISLhe15, were located upstream of the genes encoding the P-galactosidase enzyme in Lactobacillas helveticus commercial starter strains. Strains with the IS982 family element, ISLhe1, demonstrated reduced beta-galactosidase activity compared to the L. helveticus type strain, whereas strains with the ISLhe15 element expressed beta-galactosidase in the absence of lactose.

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页码：1655 / 1658

页数：4

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