This family consists of uncharacterized proteins around 500 residues in length and is mainly found in various Bacteria species, such as Thermotoga, Paenibacillus and Rhodothermus. A newly recognized enzyme from the galacturonate utilization pathway in T. maritima with tagaturonate epimerase activity [1].

1: Tagaturonate- fructuronate epimerase UxaE, a novel enzyme in the hexuronate catabolic network in Thermotoga maritima. Rodionova, I. A., D. A. Scott, N. V. Grishin, A. L. Osterman and D. A. Rodionov. Environmental microbiology 14:2920-34 (2012) PMID:22925190