Annotations: 8SVA

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth F], C [auth G], D [auth T]	PF00440	Bacterial regulatory proteins, tetR family (TetR_N)	Bacterial regulatory proteins, tetR family		Domain
A, B [auth F], C [auth G], D [auth T]	PF17932	Tetracyclin repressor-like, C-terminal domain (TetR_C_24)	Tetracyclin repressor-like, C-terminal domain	TetR family regulators are involved in the transcriptional control of multidrug efflux pumps, pathways for the biosynthesis of antibiotics, response to osmotic stress and toxic chemicals, control of catabolic pathways, differentiation processes, and ...	TetR family regulators are involved in the transcriptional control of multidrug efflux pumps, pathways for the biosynthesis of antibiotics, response to osmotic stress and toxic chemicals, control of catabolic pathways, differentiation processes, and pathogenicity [1]. The TetR proteins identified in overm ultiple genera of bacteria and archaea share a common helix-turn-helix (HTH) structure in their DNA-binding domain. However, TetR proteins can work in different ways: they can bind a target operator directly to exert their effect (e.g. TetR binds Tet(A) gene to repress it in the absence of tetracycline), or they can be involved in complex regulatory cascades in which the TetR protein can either be modulated by another regulator or TetR can trigger the cellular response [1]. TetR regulates the expression of the membrane-associated tetracycline resistance protein, TetA, which exports the tetracycline antibiotic out of the cell before it can attach to the ribosomes and inhibit protein synthesis [2]. TetR blocks transcription from the genes encoding both TetA and TetR in the absence of antibiotic. The C-terminal domain is multi-helical and is interlocked in the homodimer with the helix-turn-helix (HTH) DNA-binding domain [2]. This entry represents the C-terminal domain present in family members such as HTH-type transcriptional repressor KstR2 as well as fatty acid metabolism regulator proteins. In Mycobacterium smegmatis, KstR2 is involved in involved in cholesterol catabolism [3], while YsiA in Bacillus subtilis is involved in fatty acid degradation [4].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E [auth B], F [auth D]	DNA (5'-D(TPAPGPAPTPAPCPTPCPCPGPGPAPGPTPAPTPCPTPA)-3')	-	-	-
A, B [auth F], C [auth G], D [auth T]	TetR/AcrR family transcriptional regulator	DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding binding double-stranded DNA binding nucleic acid binding transcription regulatory region nucleic acid binding transcription regulator activity DNA-binding transcription factor activity	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth F], C [auth G], D [auth T]	IPR023772	DNA-binding HTH domain, TetR-type, conserved site	Conserved Site
A, B [auth F], C [auth G], D [auth T]	IPR009057	Homedomain-like superfamily	Homologous Superfamily
A, B [auth F], C [auth G], D [auth T]	IPR050109	HTH-type, TetR-like transcriptional regulator	Family
A, B [auth F], C [auth G], D [auth T]	IPR001647	DNA-binding HTH domain, TetR-type	Domain
A, B [auth F], C [auth G], D [auth T]	IPR036271	Tetracyclin repressor-like, C-terminal domain superfamily	Homologous Superfamily
A, B [auth F], C [auth G], D [auth T]	IPR041490	HTH-type transcriptional repressor KstR2, C-terminal	Domain

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.