This entry represents the C-terminal domain of Galactarate dehydratase (GarD). GarD catalyses the dehydration of galactarate to 5-dehydro-4-deoxy-D-galactarate. In the crystal structure, GarD forms dimers and each monomer consists of three domains: the N-terminal SAF domain (Pfam:PF08666) connected to the second domain (Pfam:PF04295) through a long linker and the C-terminal domain which represents the core of the protein. This domain adopts a variant of a Rossmann fold with an unusual crossover, consisting of seven-stranded parallel beta-sheets surrounded by nine alpha-helices [1]. This domain may contain a catalytic metal binding site [1].

1: Structure of galactarate dehydratase, a new fold in an enolase involved in bacterial fitness after antibiotic treatment. Rosas-Lemus M, Minasov G, Shuvalova L, Wawrzak Z, Kiryukhina O, Mih N, Jaroszewski L, Palsson B, Godzik A, Satchell KJF; Protein Sci. 2020;29:711-722. PMID:31811683