Annotations: 5UA1

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth A]	TetR_N	e5ua1A2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N	ECOD (1.6)
B [auth A]	EUF08050	e5ua1A1	A: alpha bundles	X: Tetracyclin repressor-like, C-terminal domain (From Topology)	H: Tetracyclin repressor-like, C-terminal domain (From Topology)	T: Tetracyclin repressor-like, C-terminal domain	F: EUF08050	ECOD (1.6)
A [auth B]	TetR_N	e5ua1B1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N	ECOD (1.6)
A [auth B]	EUF08050	e5ua1B2	A: alpha bundles	X: Tetracyclin repressor-like, C-terminal domain (From Topology)	H: Tetracyclin repressor-like, C-terminal domain (From Topology)	T: Tetracyclin repressor-like, C-terminal domain	F: EUF08050	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth A]	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)
A [auth B]	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A]	PF17925	Tetracyclin repressor-like, C-terminal domain (TetR_C_20)	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 the transcriptional regulator KstR that regulates a large set of genes responsible for cholesterol catabolism. This is important for Mycobacterium tuberculosis during infection, both at an early stage in the macrophage phagosome and later within the necrotic granuloma [3].	Domain
A [auth B], B [auth A]	PF00440	Bacterial regulatory proteins, tetR family (TetR_N)	Bacterial regulatory proteins, tetR family	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D, F	DNA (5'-D(APTPTPAPGPAPAPCPAPCPGPTPTPCPTPAPGPT)-3')	-	-	-
A [auth B], B [auth A]	HTH-type transcriptional repressor KstR	DNA binding binding organic cyclic compound binding nucleic acid binding identical protein binding protein binding protein homodimerization activity protein dimerization activity sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding double-stranded DNA binding transcription regulatory region nucleic acid binding transcription regulator activity DNA binding binding organic cyclic compound binding nucleic acid binding identical protein binding protein binding protein homodimerization activity protein dimerization activity sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding double-stranded DNA binding transcription regulatory region nucleic acid binding transcription regulator activity DNA-binding transcription factor activity	regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process cellular process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process	-
C, E	DNA (5'-D(APCPTPAPGPAPAPCPGPTPGPTPTPCPTPAPAPT)-3')	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A]	IPR001647	DNA-binding HTH domain, TetR-type	Domain
A [auth B], B [auth A]	IPR041642	HTH-type transcriptional repressor KstR, C-terminal	Domain
A [auth B], B [auth A]	IPR009057	Homeobox-like domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.