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GPR endopeptidase This model describes a tetrameric protease that makes the rate-limiting first cut in the small, acid-soluble spore proteins (SASP) of Bacillus subtilis and related species. The enzyme lacks clear homology to other known proteases. It processes its own amino end before becoming active to cleave SASPs. [Protein fate, Degradation of proteins, peptides, and glycopeptides, Cellular processes, Sporulation and germination]
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