Annotations: 3FK6

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d3fk6b1	All alpha proteins	DNA/RNA-binding 3-helical bundle	Homeodomain-like	Tetracyclin repressor-like, N-terminal domain	Tetracyclin repressor (Tet-repressor, TetR)	(Escherichia coli ) [TaxId: 562 ], (Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d3fk6b2	All alpha proteins	Tetracyclin repressor-like, C-terminal domain	Tetracyclin repressor-like, C-terminal domain	Tetracyclin repressor-like, C-terminal domain	Tetracyclin repressor (Tet-repressor, TetR)	(Escherichia coli ) [TaxId: 562 ], (Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d3fk6a1	All alpha proteins	DNA/RNA-binding 3-helical bundle	Homeodomain-like	Tetracyclin repressor-like, N-terminal domain	Tetracyclin repressor (Tet-repressor, TetR)	(Escherichia coli ) [TaxId: 562 ], (Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d3fk6a2	All alpha proteins	Tetracyclin repressor-like, C-terminal domain	Tetracyclin repressor-like, C-terminal domain	Tetracyclin repressor-like, C-terminal domain	Tetracyclin repressor (Tet-repressor, TetR)	(Escherichia coli ) [TaxId: 562 ], (Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	PDEase_I	e3fk6B1	A: alpha bundles	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: PDEase_I	ECOD (develop294)
A	PDEase_I	e3fk6A1	A: alpha bundles	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: PDEase_I	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.10.10.60	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Homeodomain-like	CATH (4.3.0)
B	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)
A	1.10.10.60	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Homeodomain-like	CATH (4.3.0)
A	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Tetracycline repressor protein class B from transposon Tn10, Tetracycline repressor protein class D	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 cation binding ion binding metal ion binding small molecule binding	regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process negative regulation of DNA-templated transcription regulation of biological process negative regulation of metabolic process biological regulation primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process metabolic process cellular process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process response to stimulus response to chemical response to antibiotic	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR023772	DNA-binding HTH domain, TetR-type, conserved site	Conserved Site
A, B	IPR009057	Homedomain-like superfamily	Homologous Superfamily
A, B	IPR003012	Tetracycline transcriptional regulator, TetR	Family
A, B	IPR050109	HTH-type, TetR-like transcriptional regulator	Family
A, B	IPR001647	DNA-binding HTH domain, TetR-type	Domain
A, B	IPR036271	Tetracyclin repressor-like, C-terminal domain superfamily	Homologous Superfamily
A, B	IPR004111	Tetracycline repressor TetR, 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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.