One member of this family, TrmB, has been shown to be a sugar-specific transcriptional regulator of the trehalose/maltose ABC transporter [2] in Thermococcus litoralis.

1: Genetics of a novel starch utilisation pathway present in Klebsiella oxytoca. Fiedler G, Pajatsch M, Bock A; J Mol Biol 1996;256:279-291. PMID:8594196

2: TrmB, a sugar-specific transcriptional regulator of the trehalose/maltose ABC transporter from the hyperthermophilic archaeon Thermococcus litoralis. Lee SJ, Engelmann A, Horlacher R, Qu Q, Vierke G, Hebbeln C, Thomm M, Boos W; J Biol Chem 2003;278:983-990. PMID:12426307