5FGL

Co-crystal Structure of NicR2_Hsp

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Tetracyclin repressor-like	8088784	4000333	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	TetR C-terminal domain-like	8090152	3000086	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Homeodomain-like	8090151	3000001	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Homeodomain-like	8090151	3000001	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	TetR C-terminal domain-like	8090152	3000086	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	TetR C-terminal domain-like	8090152	3000086	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Homeodomain-like	8090151	3000001	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Homeodomain-like	8090151	3000001	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	TetR C-terminal domain-like	8090152	3000086	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Homeodomain-like	8090151	3000001	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	TetR C-terminal domain-like	8090152	3000086	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	TetR C-terminal domain-like	8090152	3000086	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Homeodomain-like	8090151	3000001	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)
A	TetR_N_1	e5fglA1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N_1	ECOD (1.6)
A	PsrA_C	e5fglA2	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: PsrA_C	ECOD (1.6)
B	TetR_N_1	e5fglB2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N_1	ECOD (1.6)
B	PsrA_C	e5fglB1	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: PsrA_C	ECOD (1.6)
C	TetR_N_1	e5fglC2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N_1	ECOD (1.6)
C	PsrA_C	e5fglC1	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: PsrA_C	ECOD (1.6)
D	TetR_N_1	e5fglD2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N_1	ECOD (1.6)
D	PsrA_C	e5fglD1	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: PsrA_C	ECOD (1.6)
E	TetR_N_1	e5fglE1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N_1	ECOD (1.6)
E	PsrA_C	e5fglE2	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: PsrA_C	ECOD (1.6)
F	TetR_N_1	e5fglF2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: TetR_N_1	ECOD (1.6)
F	PsrA_C	e5fglF1	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: PsrA_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)
B	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)
C	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)
D	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)
E	1.10.357.10	Mainly Alpha	Orthogonal Bundle	Tetracycline Repressor	domain 2	CATH (4.3.0)
F	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, C, D, E A, B, C, D, E, F	PF17939	Tetracyclin repressor-like, C-terminal domain (TetR_C_30)	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 the Pseudomonas aeruginosa PsrA which regulates the fadBA5 beta-oxidation operon. Functional analysis of PsrA indicated its importance in regulating b-oxidative enzymes [3]. It has also been suggested that PsrA, a member of the TetR family of repressors, could affect global gene expression including activation of rpoS [4].	Domain
A, B, C, D, E A, B, C, D, E, F	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, C, D, E A, B, C, D, E, F	NicR	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, C, D, E A, B, C, D, E, F	IPR009057	Homedomain-like superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR041586	PsrA, tetracyclin repressor-like, C-terminal domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR050109	HTH-type, TetR-like transcriptional regulator	Family
A, B, C, D, E A, B, C, D, E, F	IPR001647	DNA-binding HTH domain, TetR-type	Domain
A, B, C, D, E A, B, C, D, E, F	IPR036271	Tetracyclin repressor-like, C-terminal domain superfamily	Homologous Superfamily

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.