Autolysins during sporulation of Bacillus subtilis 168

The role of autolysins during vegetative growth of Bacillus subtilis 168.

A set of isogenic mutants of Bacillus subtilis 168, insertionally inactivated in the genes encoding a number of lytic enzymes and a sigma factor (sigma D, which controls the expression of a number of autolysins) was constructed. Phenotypic analysis of the mutants determined the individual and combined roles of the autolysins in vegetative growth. The major vegetative autolysins of B. subtilis, ...

Profiles of soluble protein during sporulation of Bacillus subtilis.

Evolution of the transcription complex during sporulation of Bacillus subtilis.

Ribonucleic acid polymerase activity in partially purified extract of cells of Bacillus subtilis harvested at different times (t-1, to, t1, and t2) was studied by zone centrifugation. During the course of sporulation, vegetative sigma-factor activity decreased and the transcription complex lost some of its affinity for active sigma factor. The complex underwent a two-stage change in sedimentati...

Structural analysis of Bacillus subtilis spore peptidoglycan during sporulation.

A major structural element of bacterial endospores is a peptidoglycan (PG) wall. This wall is produced between the two opposed membranes surrounding the developing forespore and is composed of two layers. The inner layer is the germ cell wall, which appears to have a structure similar to that of the vegetative cell wall and which serves as the initial cell wall following spore germination. The ...

Protease activities during the course of sporulation on Bacillus subtilis.

Three proteolytic enzymes have been isolated from sporulating cultures of Bacillus subtilis. These activities were, respectively, a protease inhibited by ethylenediaminetetraacetic acid (EDTA) but not phenylmethylsulfonyl fluoride (PMSF), a protease active on both protein and ester substrates, and an ester-active enzyme with low activity on proteins. The latter two enzymes were inhibited by PMS...