期刊
RESEARCH IN MICROBIOLOGY
卷 151, 期 6, 页码 437-443出版社
EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/S0923-2508(00)00172-8
关键词
Streptococcus pneumoniae; murein hydrolase; module shuffling
类别
We have found two murein hydrolases (LytB and LytC) tightly bound to the cell envelope that have completely changed the domain building plan previously reported for the murein hydrolases of Streptococcus pneumoniae. The active center of LytB and LytC is located at the C-terminal, whereas the binding domain is at the N-terminal. LytC has been characterized as the first lysozyme of S. pneumoniae and behaves as an autolysin at 30 degrees C. LytB appears as the main hydrolase responsible for cell separation since inactivation of lytB leads to the formation of long chains of more than 100 cells. These findings indicate that genetic adaptation of mobile domains is extremely efficient in pneumococcus. (C) 2000 Editions scientifiques et medicales Elsevier SAS.
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