Members of the TrmB family act as global transcriptional
regulators for the activation or repression of sugar ABC
transporters and central sugar metabolic pathways, including
glycolytic, gluconeogenic, and other metabolic pathways,
and also as chromosomal stabilizers in archaea. As a
relatively newly classified transcriptional regulator family,
there is limited experimental evidence for their role in Thermococcales,
halophilic archaeon Halobacterium salinarum
NRC1, and crenarchaea Sulfolobus strains, despite being one
of the extending protein families in archaea. Recently, the
protein structures of Pyrococcus furiosus TrmB and TrmBL2
were solved, and the transcriptomic data uncovered by microarray
and ChIP-Seq were published. In the present review,
recent evidence of the functional roles of TrmB family
members in archaea is explained and extended to bacteria.
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