Alkalophilic Bacillus sp. strain LG12 has a series of serine protease genes

The Bacillus sp. strain LG12 contains the sprA, sprB, sprC, and sprD subtilisin-like protease genes which contain propeptides and signal sequences suggestive of secreted proteins. The SprC and SprD proteases are not related to subtilisin BPN' and other subtilisins. The downstream sprC and sprD genes seem to be transcribed independently while the upstream sprA and sprB genes seem to be a part of the same transcript. The signal sequence of SprB and the mature sequence of SprC contain one cysteine each while SprA and SprD contain no cysteine.