Abstract
A Bacillus subtilis strain with a base substitution in the ribosome-binding site of spoVAC was temperature sensitive (ts) in sporulation and spores prepared at the permissive temperature were ts in l-alanine-triggered germination, but not in germination with Ca 2+-dipicolinic acid (DPA) or dodecylamine. Spores of a ts spo mutant with a missense mutation in the spoVAC coding region were not ts for germination with l-alanine, dodecylamine or Ca 2+-DPA. These findings are discussed in light of the proposal that SpoVA proteins are involved not only in DPA uptake during sporulation, but also in DPA release during nutrient-mediated spore germination.
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