Annotations: 2GQQ

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	e2gqqA1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: HTH_AsnC-type	ECOD (1.6)
A	AsnC_trans_reg	e2gqqA2	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	e2gqqB1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: HTH_AsnC-type	ECOD (1.6)
B	AsnC_trans_reg	e2gqqB2	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)
C	HTH_AsnC-type	e2gqqC1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: HTH_AsnC-type	ECOD (1.6)
C	AsnC_trans_reg	e2gqqC2	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)
D	HTH_AsnC-type	e2gqqD1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: HTH_AsnC-type	ECOD (1.6)
D	AsnC_trans_reg	e2gqqD2	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)
C	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)
C	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)
D	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)
D	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, C, D	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 t ...	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, C, D	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, C, D	Leucine-responsive regulatory protein	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 DNA-binding transcription activator activity identical protein binding protein binding DNA-binding transcription repressor activity	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 catabolic process oxoacid metabolic process alanine catabolic process carboxylic acid metabolic process amino acid metabolic process organic acid catabolic process organic acid metabolic process alpha-amino acid metabolic process alpha-amino acid catabolic process carboxylic acid catabolic process small molecule metabolic process small molecule catabolic process amino acid catabolic process alanine metabolic process response to acid chemical response to stimulus response to chemical response to oxygen-containing compound response to nitrogen compound response to amino acid response to L-leucine	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol protein-containing complex protein-DNA complex

InterPro: Protein Family Classification InterPro Database Homepage

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