Ribosomal proteins of Bacillus subtilis vegetative and sporulating cells
- PMID: 807795
- DOI: 10.1007/BF00264799
Ribosomal proteins of Bacillus subtilis vegetative and sporulating cells
Abstract
The ribosomal subunit proteins(30S and 50 S) from vegetative and sporulating cells of Bacillus subtilis 168M were analyzed by two dimensional acrylamide gel electrophoresis. Twenty two proteins were identified in the 30S subunits and 28 proteins are detectable in the 50S subunits. The number of proteins and their electrophoretic mobility seem to remain unaltered during the sporualtion process. The ribosomal proteins of a thermosensitive sporulation mutant (ts-4), isolated from stationary phase cultures, under permissive (for sporulation) and non-permissive conditions, did not show any qualitative difference in either of the subunits. The 21S precursor particles derived from log phase cell ribosomes show two different proteins, in addition to those present in the 30 S subunit. It is suggested that these two proteins either disappear or are modified during the maturation process.
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