Annotations: 2CG4

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2cg4a1	All alpha proteins	DNA/RNA-binding 3-helical bundle	'Winged helix' DNA-binding domain	Lrp/AsnC-like transcriptional regulator N-terminal domain	Regulatory protein AsnC	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d2cg4a2	Alpha and beta proteins (a+b)	Ferredoxin-like	Dimeric alpha+beta barrel	Lrp/AsnC-like transcriptional regulator C-terminal domain	Regulatory protein AsnC	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d2cg4b1	All alpha proteins	DNA/RNA-binding 3-helical bundle	'Winged helix' DNA-binding domain	Lrp/AsnC-like transcriptional regulator N-terminal domain	Regulatory protein AsnC	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d2cg4b2	Alpha and beta proteins (a+b)	Ferredoxin-like	Dimeric alpha+beta barrel	Lrp/AsnC-like transcriptional regulator C-terminal domain	Regulatory protein AsnC	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Lrp/AsnC transcriptional regulator-like	8003304	4000279	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Winged helix DNA-binding domain	8003307	3000034	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Dimeric alpha+beta barrel	8003305	3000089	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Winged helix DNA-binding domain	8003307	3000034	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Dimeric alpha+beta barrel	8003305	3000089	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	HTH_AsnC-type	e2cg4A1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: HTH_AsnC-type	ECOD (1.6)
A	AsnC_trans_reg	e2cg4A2	A: a+b two layers	X: Alpha-beta plaits	H: Dimeric alpha+beta barrel (From Topology)	T: Dimeric alpha+beta barrel	F: AsnC_trans_reg	ECOD (1.6)
B	HTH_AsnC-type	e2cg4B1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: HTH_AsnC-type	ECOD (1.6)
B	AsnC_trans_reg	e2cg4B2	A: a+b two layers	X: Alpha-beta plaits	H: Dimeric alpha+beta barrel (From Topology)	T: Dimeric alpha+beta barrel	F: AsnC_trans_reg	ECOD (1.6)

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	3.30.70.920	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Lrp/AsnC effector binding domain/regulation of amino acid metabolism (RAM) domain	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	3.30.70.920	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Lrp/AsnC effector binding domain/regulation of amino acid metabolism (RAM) domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01037	Lrp/AsnC ligand binding domain (AsnC_trans_reg)	Lrp/AsnC ligand binding domain	The l-leucine-responsive regulatory protein (Lrp/AsnC) family is a family of similar bacterial transcription regulatory proteins. The family is named after two E. coli proteins involved in regulating amino acid metabolism. This entry corresponds to ...	The l-leucine-responsive regulatory protein (Lrp/AsnC) family is a family of similar bacterial transcription regulatory proteins. The family is named after two E. coli proteins involved in regulating amino acid metabolism. This entry corresponds to the usually C-terminal regulatory ligand binding domain. Structurally this domain has a dimeric alpha/beta barrel fold [2]. This domain binds almost exclusively amino acids but also 4-hydroxyphenylpyruvate and kynurenine (Matilla et. al., FEMS Microbiology Reviews, fuab043, 45, 2021, 1. https://doi.org/10.1093/femsre/fuab043).	Domain
A, B	PF13412	Winged helix-turn-helix DNA-binding (HTH_24)	Winged helix-turn-helix DNA-binding	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	REGULATORY PROTEIN ASNC	transcription regulator activity DNA-binding transcription factor activity sequence-specific DNA binding DNA binding binding organic cyclic compound binding nucleic acid binding identical protein binding protein binding	regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription regulation of biological process cellular metabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription regulation of biological process cellular metabolic process negative regulation of metabolic process primary metabolic process regulation of cellular metabolic process negative regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process cellular biosynthetic process RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process negative regulation of cellular process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process biological regulation regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process negative regulation of biosynthetic process cellular process response to acid chemical response to organic substance response to stimulus response to chemical response to amino acid positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of macromolecule metabolic process positive regulation of nucleobase-containing compound metabolic process positive regulation of RNA metabolic process positive regulation of DNA-templated transcription positive regulation of biological process positive regulation of cellular metabolic process positive regulation of biosynthetic process positive regulation of cellular process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR011991	ArsR-like helix-turn-helix domain	Domain
A, B	IPR019887	Transcription regulator AsnC/Lrp, ligand binding domain	Domain
A, B	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR019888	Transcription regulator AsnC-like	Family
A, B	IPR019885	Transcription regulator HTH, AsnC-type, conserved site	Conserved Site
A, B	IPR000485	AsnC-type HTH domain	Domain
A, B	IPR011008	Dimeric alpha-beta barrel	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.