Unknown

Dataset Information

0

The use of inhibitors to identify early events during Bacillus megaterium KM spore germination.


ABSTRACT: The germination response of spores of Bacillus megaterium KM, as measured by loss of A600, is more than 95% inhibited by 1 mM-HgCl2. Two Hg2+-sensitive sites (referred to as 'sites I and II') have been identified during germination. Site I represents a pre-commitment event and can be protected from HgCl2 by 50 mM-D-alanine, whereas site II represents a post-commitment event and is not D-alanine-protectable. At 1 mM-HgCl2, 25% of the spore population becomes committed to germinate, but an A600 loss of less than 5% occurs. In this system, loss of heat resistance was associated with commitment, whereas selective cortex hydrolysis, release of pyridine-2,6-dicarboxylic acid, Zn2+ and soluble peptidoglycan, as well as loss of refractility, were identified as post-commitment events. The commitment event was reversibly inhibited by several proteinase inhibitors and a membrane bulking agent. A model of spore germination based on these results is presented.

SUBMITTER: Foster SJ 

PROVIDER: S-EPMC1147068 | biostudies-other | 1986 Aug

REPOSITORIES: biostudies-other

Similar Datasets

| S-EPMC1153977 | biostudies-other
| S-EPMC3957701 | biostudies-literature
| S-EPMC1158096 | biostudies-other
| S-EPMC1154239 | biostudies-other
| S-EPMC1147743 | biostudies-other
| S-EPMC6182894 | biostudies-literature
| S-EPMC127533 | biostudies-literature
| S-EPMC1186221 | biostudies-other
| S-EPMC2937387 | biostudies-literature
| S-EPMC4661057 | biostudies-literature