from Kürşad Turgay writing in Bacillus: Cellular and Molecular Biology (Second edition):
Proteolysis is an important part of many fundamental cellular processes. The intricate involvement of proteases and peptidases in protein quality control, general stress response, control of regulatory networks and development in Bacillus subtilis are introduced in this review. Especially the more recent developments on the role of AAA+ proteins and their adaptor proteins in regulated and general proteolysis and the role of regulated intra-membrane proteolysis and membrane proteases in signal transduction are discussed.
Further reading: Bacillus: Cellular and Molecular Biology (Second edition)