InterPro : IPR002577

Name  Helix-turn-helix, HxlR type Short Name  HTH_HxlR
Type  Domain Description  The hxlR-type HTH domain is a domain of ~90-100 amino acids present in putative transcription regulators with a winged helix-turn-helix (wHTH) structure. The domain is named after Bacillus subtilishxlR, a transcription activator of the hxlAB operon involved in the detoxification of formaldehyde []. The hxlR-type domain forms the core of putative transcription regulators and of hypothetical proteins occurring in eubacteria as well as in archaea. The sequence and structure of hxlR-type proteins show similarities with the marR-type wHTH []. The crystal structure of ytfH resembles the DNA-binding domains of winged helix proteins, containing a three helix (H) bundle and a three-stranded antiparallel beta-sheet (B) in the topology: H1-H2-B1-H3-H4-B2-B3-H5-H6. This topology corresponds with that of the marR-type DNA-binding domain, wherein helices 3 and 4 comprise the helix-turn-helix motif and the beta-sheet is called the wing.

Sequence Features

GO Displayer


InterPro protein domain ID --> Contigs



0 Child Features

0 Contains

0 Found In

1 Parent Features

Id Name Short Name Type
IPR011991 Winged helix-turn-helix DNA-binding domain WHTH_DNA-bd_dom Domain

2 Publications

First Author Title Year Journal Volume Pages
Yasueda H Bacillus subtilis yckG and yckF encode two key enzymes of the ribulose monophosphate pathway used by methylotrophs, and yckH is required for their expression. 1999 J Bacteriol 181 7154-60
Huffman JL Prokaryotic transcription regulators: more than just the helix-turn-helix motif. 2002 Curr Opin Struct Biol 12 98-106

To cite PlanMine, please refer to the following publication:

Rozanski, A., Moon, H., Brandl, H., Martín-Durán, J. M., Grohme, M., Hüttner, K., Bartscherer, K., Henry, I., & Rink, J. C.
PlanMine 3.0—improvements to a mineable resource of flatworm biology and biodiversity
Nucleic Acids Research, gky1070. doi:10.1093/nar/gky1070 (2018)