This small family includes, GlmL/MutL from Clostridium tetanomorphum and Clostridium cochlearium. GlmL is located between the genes for the two subunits, epsilon (GlmE) and sigma (GlmS), of the coenzyme-B12-dependent glutamate mutase (methylaspartate mutase), the first enzyme in a pathway of glutamate fermentation. Members shows significant sequence similarity to the hydantoinase branch of the hydantoinase/oxoprolinase family [2].

1: Cloning and sequencing of glutamate mutase component E from Clostridium tetanomorphum. Organization of the mut genes. Holloway DE, Marsh EN; FEBS Lett. 1993;317:44-48. PMID:8428631

2: Characterization of the coenzyme-B12-dependent glutamate mutase from Clostridium cochlearium produced in Escherichia coli. Zelder O, Beatrix B, Leutbecher U, Buckel W; Eur J Biochem. 1994;226:577-585. PMID:7880251