Annotations: 3FRQ

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Homeodomain-like	8090200	3000001	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	TetR C-terminal domain-like	8090201	3000086	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Homeodomain-like	8090200	3000001	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	TetR C-terminal domain-like	8090201	3000086	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	TetR_N	e3frqB1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N	ECOD (1.6)
B	UNK_F_TYPE	e3frqB2	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: UNK_F_TYPE	ECOD (1.6)
A	TetR_N	e3frqA1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N	ECOD (1.6)
A	UNK_F_TYPE	e3frqA2	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: UNK_F_TYPE	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)
A	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, B	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
A, B	Repressor protein MphR(A)	DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding binding double-stranded DNA binding organic cyclic compound binding nucleic acid binding transcription regulatory region nucleic acid binding transcription regulator activity DNA-binding transcription factor activity transferase activity catalytic activity	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR009057	Homedomain-like superfamily	Homologous Superfamily
A, B	IPR050109	HTH-type, TetR-like transcriptional regulator	Family
A, B	IPR001647	DNA-binding HTH domain, TetR-type	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.