LytTr DNA-binding domain
SMART accession number:SM00850
Description: This domain is found in a variety of bacterial transcriptional regulators. The domain binds to a specific DNA sequence pattern.
Interpro abstract (IPR007492):

The LytTR domain is a DNA-binding, potential winged helix-turn-helix (wHTH) domain of about 100 amino acids, present in bacterial transcriptional regulators of the algR/agrA/lytR family. It is named after Bacillus subtilis LytT and Staphylococcus aureus lytR response regulators, involved in the regulation of cell autolysis [ (PUBMED:12034833) ].

The LytTR domain is found in several bacterial cytoplasmic proteins that regulate the production of important virulence factors, like extracellular polysaccharides, toxins and bacteriocins. These response regulators of the microbial two-component signal transduction systems contain N-terminal cheY-like domains and the LytTR domain in the C-terminal part is expected to bind to specific DNA sequences in the upstream regions of target genes [ (PUBMED:12367524) ]. Other domains found N-terminally of LytTR are an ATP-binding domain of ABC-type transporter family and a PAS domain. Besides these cytoplasmic proteins, LytTR also occurs in membrane-bound bacterial proteins. The N-terminal parts of these proteins contain three to eight predicted transmembrane segments or the transmembrane MHYT domain.

According to secondary structure predictions the LytTR domain consists of four beta-strands and three alpha-helices. The structure is predicted to form a novel type of DNA-binding domain, showing similarity to the 'winged HTH' or 'winged helix' proteins [ (PUBMED:12034833) (PUBMED:12367524) ].

GO function:DNA binding (GO:0003677)
Family alignment:
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There are 46828 LytTR domains in 46828 proteins in SMART's nrdb database.

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