Tags: Protein.
In molecular biology the 3H domain is a protein domain named after its three highly conserved histidine residues. The 3H domain appears to be a small molecule-binding domain based on its occurrence with other domains. Several proteins carrying this domain are transcriptional regulators from the biotin repressor family. The transcription regulator TM1602 from Thermotoga maritima is a DNA-binding protein thought to belong to a family of de novo NAD synthesis pathway regulators.
