Annotations: 1AM9

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
E [auth A]	d1am9a_	All alpha proteins	HLH-like	HLH, helix-loop-helix DNA-binding domain	HLH, helix-loop-helix DNA-binding domain	SREBP-1a	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F [auth B]	d1am9b_	All alpha proteins	HLH-like	HLH, helix-loop-helix DNA-binding domain	HLH, helix-loop-helix DNA-binding domain	SREBP-1a	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G [auth C]	d1am9c_	All alpha proteins	HLH-like	HLH, helix-loop-helix DNA-binding domain	HLH, helix-loop-helix DNA-binding domain	SREBP-1a	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
H [auth D]	d1am9d_	All alpha proteins	HLH-like	HLH, helix-loop-helix DNA-binding domain	HLH, helix-loop-helix DNA-binding domain	SREBP-1a	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
E [auth A]	SCOP2 Family	HLH helix-loop-helix DNA-binding domain	8024873	4000913	SCOP2 (2022-06-29)
E [auth A]	SCOP2 Superfamily	HLH helix-loop-helix DNA-binding domain	8037252	3001962	SCOP2 (2022-06-29)
F [auth B]	SCOP2B Superfamily	HLH helix-loop-helix DNA-binding domain	8037252	3001962	SCOP2B (2022-06-29)
G [auth C]	SCOP2B Superfamily	HLH helix-loop-helix DNA-binding domain	8037252	3001962	SCOP2B (2022-06-29)
H [auth D]	SCOP2B Superfamily	HLH helix-loop-helix DNA-binding domain	8037252	3001962	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)
E [auth A]	HLH	e1am9A1	A: alpha duplicates or obligate multimers	X: HLH-like	H: HLH, helix-loop-helix DNA-binding domain (From Topology)	T: HLH, helix-loop-helix DNA-binding domain	F: HLH	ECOD (1.6)
F [auth B]	HLH	e1am9B1	A: alpha duplicates or obligate multimers	X: HLH-like	H: HLH, helix-loop-helix DNA-binding domain (From Topology)	T: HLH, helix-loop-helix DNA-binding domain	F: HLH	ECOD (1.6)
G [auth C]	HLH	e1am9C1	A: alpha duplicates or obligate multimers	X: HLH-like	H: HLH, helix-loop-helix DNA-binding domain (From Topology)	T: HLH, helix-loop-helix DNA-binding domain	F: HLH	ECOD (1.6)
H [auth D]	HLH	e1am9D1	A: alpha duplicates or obligate multimers	X: HLH-like	H: HLH, helix-loop-helix DNA-binding domain (From Topology)	T: HLH, helix-loop-helix DNA-binding domain	F: HLH	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E [auth A]	4.10.280.10	Few Secondary Structures	Irregular	MYOD Basic-Helix-Loop-Helix Domain, subunit B	Helix-loop-helix DNA-binding domain	CATH (4.3.0)
F [auth B]	4.10.280.10	Few Secondary Structures	Irregular	MYOD Basic-Helix-Loop-Helix Domain, subunit B	Helix-loop-helix DNA-binding domain	CATH (4.3.0)
G [auth C]	4.10.280.10	Few Secondary Structures	Irregular	MYOD Basic-Helix-Loop-Helix Domain, subunit B	Helix-loop-helix DNA-binding domain	CATH (4.3.0)
H [auth D]	4.10.280.10	Few Secondary Structures	Irregular	MYOD Basic-Helix-Loop-Helix Domain, subunit B	Helix-loop-helix DNA-binding domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
E [auth A], F [auth B], G [auth C], H [auth D]	PF00010	Helix-loop-helix DNA-binding domain (HLH)	Helix-loop-helix DNA-binding domain	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth E], C [auth G]	DNA (5'-D(TPTPGPCPAPGPTPGPGPGPGPTPGPAPTPCP*T )-3')	-	-	-
B [auth F], D [auth H]	DNA (5'-D(CPAPTPGPAPGPAPTPCPAPCPCPCPCPAPCPT PGPCPAP*A)-3')	-	-	-
E [auth A], F [auth B], G [auth C], H [auth D]	PROTEIN (STEROL REGULATORY ELEMENT BINDING PROTEIN 1A)	transcription factor binding transcription coregulator binding protein binding binding DNA binding organic cyclic compound binding nucleic acid binding DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity nuclear receptor activity molecular transducer activity ligand-activated transcription factor activity signaling receptor activity transcription factor binding transcription coregulator binding protein binding binding DNA binding organic cyclic compound binding nucleic acid binding DNA-binding transcription factor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription factor activity nuclear receptor activity molecular transducer activity ligand-activated transcription factor activity signaling receptor activity protein dimerization activity sequence-specific DNA binding sequence-specific double-stranded DNA binding double-stranded DNA binding DNA-binding transcription activator activity, RNA polymerase II-specific DNA-binding transcription activator activity RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding transcription cis-regulatory region binding transcription regulatory region nucleic acid binding RNA polymerase II cis-regulatory region sequence-specific DNA binding protein-containing complex binding chromatin binding sterol response element binding kinase binding enzyme binding protein kinase binding	response to stimulus response to chemical response to xenobiotic stimulus cellular response to stimulus regulation of biological process regulation of cellular process cellular response to sterol depletion signaling biological regulation response to sterol depletion cell communication SREBP signaling pathway cellular response to stress response to stress response to stimulus response to chemical response to xenobiotic stimulus cellular response to stimulus regulation of biological process regulation of cellular process cellular response to sterol depletion signaling biological regulation response to sterol depletion cell communication SREBP signaling pathway cellular response to stress response to stress ER-nucleus signaling pathway cellular process signal transduction response to organic substance response to ketone response to lipid response to endogenous stimulus response to progesterone response to oxygen-containing compound response to hormone response to steroid hormone response to organic cyclic compound response to organonitrogen compound response to peptide hormone response to nitrogen compound response to glucagon response to hexose response to monosaccharide response to carbohydrate response to fructose positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process DNA-templated transcription positive regulation of metabolic process regulation of RNA metabolic process regulation of miRNA metabolic process organic substance biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process miRNA metabolic process positive regulation of nucleobase-containing compound metabolic process cellular metabolic process primary metabolic process regulation of cellular metabolic process positive regulation of RNA metabolic process organic cyclic compound metabolic process regulation of gene expression 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 cellular biosynthetic process positive regulation of DNA-templated transcription positive regulation of biological process RNA metabolic process positive regulation of miRNA transcription positive regulation of cellular metabolic process positive regulation of miRNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process miRNA transcription organic substance metabolic process positive regulation of biosynthetic process positive regulation of cellular process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process positive regulation of RNA biosynthetic process ncRNA metabolic process positive regulation of cellular biosynthetic process regulation of miRNA transcription protein localization regulation of localization establishment of protein localization cellular localization regulation of protein localization protein targeting regulation of protein targeting to mitochondrion localization cellular macromolecule localization regulation of establishment of protein localization establishment of localization regulation of establishment of protein localization to mitochondrion establishment of protein localization to organelle regulation of protein targeting regulation of cellular localization macromolecule localization protein localization to organelle protein localization to mitochondrion protein targeting to mitochondrion establishment of protein localization to mitochondrion cellular response to nutrient levels response to nutrient levels response to starvation cellular response to starvation regulation of protein stability regulation of biological quality catabolic process regulation of cellular component organization macroautophagy autophagy regulation of autophagy cellular catabolic process cellular component organization mitophagy organelle disassembly regulation of autophagy of mitochondrion cellular component organization or biogenesis process utilizing autophagic mechanism mitochondrion organization cellular component disassembly regulation of mitophagy regulation of catabolic process regulation of organelle organization organelle organization regulation of macroautophagy regulation of cellular catabolic process regulation of mitochondrion organization autophagy of mitochondrion developmental process fat cell differentiation cellular developmental process cell differentiation mRNA transcription by RNA polymerase II mRNA transcription transcription by RNA polymerase II mRNA metabolic process response to organophosphorus response to purine-containing compound response to cAMP regulation of lipid storage lipid storage lipid localization maintenance of location negative regulation of biological process negative regulation of cellular metabolic process negative regulation of RNA biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of transcription by RNA polymerase II negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II negative regulation of metabolic process negative regulation of cellular biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of RNA metabolic process negative regulation of cellular process negative regulation of macromolecule metabolic process negative regulation of biosynthetic process positive regulation of transcription by RNA polymerase II nitrogen compound transport transport hormone secretion protein localization to extracellular region peptide secretion secretion by cell amide transport signal release secretion regulation of hormone levels organic substance transport establishment of protein localization to extracellular region cell-cell signaling export from cell protein secretion peptide transport protein transport peptide hormone secretion hormone transport insulin secretion negative regulation of triglyceride metabolic process neutral lipid metabolic process regulation of triglyceride metabolic process regulation of lipid metabolic process triglyceride metabolic process cellular lipid metabolic process glycerolipid metabolic process acylglycerol metabolic process negative regulation of lipid metabolic process lipid metabolic process rhythmic process circadian rhythm oxoacid metabolic process organic acid metabolic process cellular ketone metabolic process regulation of small molecule metabolic process small molecule metabolic process fatty acid metabolic process regulation of cellular ketone metabolic process carboxylic acid metabolic process regulation of fatty acid metabolic process monocarboxylic acid metabolic process lipid biosynthetic process heart process multicellular organismal process regulation of heart rate by chemical signal system process regulation of heart contraction regulation of system process circulatory system process regulation of blood circulation regulation of multicellular organismal process heart contraction blood circulation regulation of heart rate regulation of cholesterol metabolic process sterol metabolic process positive regulation of lipid metabolic process regulation of alcohol biosynthetic process positive regulation of cholesterol biosynthetic process positive regulation of steroid biosynthetic process sterol biosynthetic process regulation of sterol biosynthetic process regulation of steroid biosynthetic process regulation of cholesterol biosynthetic process organic hydroxy compound metabolic process steroid metabolic process cholesterol metabolic process alcohol metabolic process steroid biosynthetic process secondary alcohol biosynthetic process small molecule biosynthetic process regulation of steroid metabolic process cholesterol biosynthetic process secondary alcohol metabolic process positive regulation of lipid biosynthetic process organic hydroxy compound biosynthetic process alcohol biosynthetic process positive regulation of cholesterol metabolic process positive regulation of steroid metabolic process regulation of lipid biosynthetic process positive regulation of small molecule metabolic process positive regulation of alcohol biosynthetic process positive regulation of sterol biosynthetic process multicellular organism development tube development anatomical structure development animal organ development respiratory tube development lung development respiratory system development system development response to retinoic acid response to glucose negative regulation of protein transport negative regulation of transport negative regulation of secretion negative regulation of hormone secretion negative regulation of secretion by cell regulation of peptide hormone secretion negative regulation of peptide hormone secretion negative regulation of establishment of protein localization regulation of protein secretion regulation of secretion negative regulation of protein secretion regulation of hormone secretion regulation of peptide secretion negative regulation of signaling negative regulation of cell communication negative regulation of peptide secretion regulation of secretion by cell negative regulation of protein localization regulation of signaling regulation of transport regulation of peptide transport regulation of protein transport negative regulation of insulin secretion regulation of insulin secretion regulation of cell communication neutral lipid biosynthetic process positive regulation of triglyceride metabolic process acylglycerol biosynthetic process triglyceride biosynthetic process regulation of triglyceride biosynthetic process positive regulation of triglyceride biosynthetic process glycerolipid biosynthetic process response to alcohol response to ethanol cellular response to nitrogen compound insulin receptor signaling pathway cell surface receptor protein tyrosine kinase signaling pathway cellular response to endogenous stimulus cellular response to organic substance enzyme-linked receptor protein signaling pathway cellular response to hormone stimulus cell surface receptor signaling pathway cellular response to peptide hormone stimulus cellular response to oxygen-containing compound cellular response to chemical stimulus cellular response to organonitrogen compound response to insulin cellular response to insulin stimulus response to fatty acid cellular response to fatty acid cellular response to lipid response to nutrient response to food	membrane-bounded organelle intracellular organelle organelle envelope intracellular anatomical structure organelle nuclear envelope nucleus cellular anatomical entity intracellular membrane-bounded organelle endomembrane system cytoplasm cytosol protein-containing complex protein-DNA complex membrane-bounded organelle intracellular organelle organelle envelope intracellular anatomical structure organelle nuclear envelope nucleus cellular anatomical entity intracellular membrane-bounded organelle endomembrane system cytoplasm cytosol protein-containing complex protein-DNA complex intracellular non-membrane-bounded organelle chromatin chromosome non-membrane-bounded organelle Golgi membrane Golgi apparatus membrane bounding membrane of organelle organelle membrane membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen organelle subcompartment endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum endoplasmic reticulum membrane transport vesicle intracellular vesicle transport vesicle membrane cytoplasmic vesicle membrane coated vesicle membrane COPII-coated ER to Golgi transport vesicle vesicle membrane cytoplasmic vesicle ER to Golgi transport vesicle membrane coated vesicle vesicle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
E [auth A], F [auth B], G [auth C], H [auth D]	IPR036638	Helix-loop-helix DNA-binding domain superfamily	Homologous Superfamily
E [auth A], F [auth B], G [auth C], H [auth D]	IPR011598	Myc-type, basic helix-loop-helix (bHLH) domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
E [auth A], F [auth B], G [auth C], H [auth D]	Pharos: P36956	obesity disorder non-alcoholic fatty liver disease Liver Cirrhosis, Experimental chronic kidney disease malignant mesothelioma pituitary cancer adrenal cortex carcinoma attention deficit hyperactivity disorder, inattentive type type 2 diabetes mellitus hepatocellular carcinoma inborn carbohydrate metabolic disorder liver disease myopathy psoriasis atypical teratoid rhabdoid tumor obesity disorder non-alcoholic fatty liver disease Liver Cirrhosis, Experimental chronic kidney disease malignant mesothelioma pituitary cancer adrenal cortex carcinoma attention deficit hyperactivity disorder, inattentive type type 2 diabetes mellitus hepatocellular carcinoma inborn carbohydrate metabolic disorder liver disease myopathy psoriasis atypical teratoid rhabdoid tumor fatty liver disease hyperglycemia inherited lipid metabolism disorder malignant ependymoma ovarian cancer schizophrenia astrocytic tumor subependymal giant cell astrocytoma breast cancer glioblastoma hyperinsulinism

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.