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Deletion of a putative NlpC/P60 endopeptidase BAS1812 affects germination, long-term survival and endospore formation in Bacillus anthracis

Title
Deletion of a putative NlpC/P60 endopeptidase BAS1812 affects germination, long-term survival and endospore formation in Bacillus anthracis
Author
채영규
Keywords
Bacillus anthracis; NlpC/P60; germination; sporulation; stationary-phase survival
Issue Date
2017-02
Publisher
MICROBIOLOGY SOC
Citation
MICROBIOLOGY-SGM, v. 163, no. 2, page. 144-152
Abstract
Bacillus anthracis, an aetiologic agent of the zoonotic disease anthrax, encodes a putative NlpC/P60 endopeptidase BAS1812. It harbours a signal peptide, three bacterial SH3 domains and an NlpC/P60 family domain. Previous studies showed that BAS1812 is immunogenic in infected hosts and is a potential biomarker for anthrax treatment. To date, however, little information is known about its function and involvement in anthrax pathogenesis. Here we describe the phenotypic effect of BAS1812 deletion in B. anthracis Sterne strain. Transcriptional analysis showed that BAS1812 expression in a host-like environment was enhanced at the end of log phase, started to diminish after entry to stationary phase and increased again late in stationary phase. The constructed BAS1812 mutant showed impaired long-term survival in the stationary growth phase, less resilience to detergent, lesser endospore formation and delayed germination. The mutant also showed diminished ability to degrade peptidoglycan, but its ability to produce anthrax exotoxins was not affected. We hypothesize that BAS1812 is a cell wall hydrolase involved in biological activities related to maintaining cell wall integrity, sporulation and spore germination.
URI
https://mic.microbiologyresearch.org/content/journal/micro/10.1099/mic.0.000416http://repository.hanyang.ac.kr/handle/20.500.11754/112854
ISSN
1350-0872; 1465-2080
DOI
10.1099/mic.0.000416
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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