Annotations: 3ISP

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Peptidase_C1	e3ispA1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: HTH	T: winged helix domain	F: Peptidase_C1	ECOD (v294.1)
A	EryCIII-like_N	e3ispA2	A: a/b three-layered sandwiches	X: Rubredoxin-like	H: Ferritin/Heme oxygenase	T: Heme oxygenase/Ribonucleotide reductase	F: EryCIII-like_N	ECOD (v294.1)
B	HTH_1	e3ispB1	A: a/b three-layered sandwiches	X: TBP-like	H: Bet v1-like	T: Bet v1-like	F: HTH_1	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
A	3.40.190.290	Alpha Beta	3-Layer(aba) Sandwich	D-Maltodextrin-Binding Protein	domain 2	CATH (4.3.0)
B	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
B	3.40.190.290	Alpha Beta	3-Layer(aba) Sandwich	D-Maltodextrin-Binding Protein	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF03466	LysR substrate binding domain (LysR_substrate)	LysR substrate binding domain	-	Family
A, B	PF00126	Bacterial regulatory helix-turn-helix protein, lysR family (HTH_1)	Bacterial regulatory helix-turn-helix protein, lysR family		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	HTH-type transcriptional regulator Rv1985c/MT2039	DNA binding binding nucleic acid binding sequence-specific DNA binding sequence-specific double-stranded DNA binding double-stranded DNA binding DNA replication origin binding transcription regulator activity DNA-binding transcription factor activity	regulation of cellular 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 regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process biological regulation primary metabolic process regulation of cellular 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 regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological 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 cellular process metabolic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process negative regulation of biological process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process negative regulation of macromolecule metabolic process negative regulation of DNA replication negative regulation of metabolic process DNA metabolic process DNA replication negative regulation of DNA metabolic process regulation of DNA metabolic process regulation of DNA replication	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR017685	HTH-type transcriptional regulator ArgP	Family
A, B	IPR005119	LysR, substrate-binding	Domain
A, B	IPR050176	LysR-type transcriptional regulator	Family
A, B	IPR000847	LysR, HTH, N-terminal domain	Domain
A, B	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR036390	Winged helix DNA-binding 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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.