This domain is found in the stage II sporulation protein SpoIID. SpoIID is necessary for membrane migration as well as for some of the earlier steps in engulfment during bacterial endospore formation [2]. The domain is also found in amidase enhancer proteins. Amidases, like SpoIID, are cell wall hydrolases [1].

1: Biological roles of two new murein hydrolases of Streptococcus pneumoniae representing examples of module shuffling. Lopez R, Gonzalez MP, Garcia E, Garcia JL, Garcia P; Res Microbiol 2000;151:437-443. PMID:10961456

2: A cytoskeleton-like role for the bacterial cell wall during engulfment of the Bacillus subtilis forespore. Abanes-De Mello A, Sun YL, Aung S, Pogliano K; Genes Dev 2002;16:3253-3264. PMID:12502745