This family consists of several bacterial thiazole biosynthesis protein G sequences. ThiG , together with ThiF and ThiH, is proposed to be involved in the synthesis of 4-methyl-5-(b-hydroxyethyl)thiazole (THZ) which is an intermediate in the thiazole production pathway [1]. This family also includes triosephosphate isomerase and pyridoxal 5'-phosphate synthase subunit PdxS.

1: Expression of thiamin biosynthetic genes (thiCOGE) and production of symbiotic terminal oxidase cbb3 in Rhizobium etli. Miranda-Rios J, Morera C, Taboada H, Davalos A, Encarnacion S, Mora J, Soberon M; J Bacteriol 1997;179:6887-6893. PMID:9371431