This family includes a range of proteins from antibiotic production pathways. The family includes gra-ORF27 Swiss:Q9ZA32 product that probably functions at an early step, most likely as a dTDP-4-keto-6- deoxyglucose-2,3-dehydratase [1]. Its homologues include dnmT from the daunorubicin biosynthetic gene cluster in S. peucetius [2], a similar gene from the daunomycin biosynthetic cluster in Streptomyces sp. strain C5 Swiss:Q53880 [3] , eryBVI from the erythromycin cluster in S. erythraea and snoH from the nogalamycin cluster in S. nogalater. The proteins in this family are composed of two copies of a 200 amino acid long unit that may be a structural domain.

1: The granaticin biosynthetic gene cluster of Streptomyces violaceoruber Tu22: sequence analysis and expression in a heterologous host. Ichinose K, Bedford DJ, Tornus D, Bechthold A, Bibb MJ, Revill WP, Floss HG, Hopwood DA; Chem Biol 1998;5:647-659. PMID:9831526

2: Enhanced antibiotic production by manipulation of the Streptomyces peucetius dnrH and dnmT genes involved in doxorubicin (adriamycin) biosynthesis. Scotti C, Hutchinson CR; J Bacteriol 1996;178:7316-7321. PMID:8955419

3: Cloning, sequencing, and analysis of aklaviketone reductase from Streptomyces sp. strain C5. Dickens ML, Ye J, Strohl WR; J Bacteriol 1996;178:3384-3388. PMID:8655529