Identification of a Tyrosine Decarboxylase Gene (tdcA) in Streptococcus thermophilus 1TT45 and Analysis of Its Expression and Tyramine Production in Milk

被引:50
|
作者
La Gioia, Federica [1 ]
Rizzotti, Lucia [1 ]
Rossi, Franca [1 ]
Gardini, Fausto [2 ]
Tabanelli, Giulia [2 ]
Torriani, Sandra [1 ]
机构
[1] Univ Verona, Dipartimento Biotecnol, I-37134 Verona, Italy
[2] Univ Bologna, Dipartimento Sci Alimenti, Cesena, Italy
关键词
BIOGENIC-AMINE PRODUCTION; LACTOBACILLUS; QUANTIFICATION; LACTOCOCCUS; HISTAMINE; CHEESE; STRAIN; GROWTH; MODEL;
D O I
10.1128/AEM.01928-10
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
In this study, a tyrosine decarboxylase gene (tdcA) was identified in 1 among 83 Streptococcus thermophilus strains tested. Its sequence, nearly identical to that of a tdcA of Lactobacillus curvatus, indicated a horizontal gene transfer event. Transcription in milk and the formation of critical levels of tyramine were observed in the presence of tyrosine.
引用
收藏
页码:1140 / 1144
页数:5
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