2LFH

Solution NMR Structure of the Helix-loop-Helix Domain of Human ID3 Protein, Northeast Structural Genomics Consortium Target HR3111A

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	HLH	e2lfhA1	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)
B	HLH	e2lfhB1	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)
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)
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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	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, B	DNA-binding protein inhibitor ID-3	protein binding binding protein domain specific binding molecular function inhibitor activity molecular function regulator activity transcription regulator inhibitor activity fatty acid binding organic acid binding leptomycin B binding ion binding organic cyclic compound binding anion binding lipid binding carboxylic acid binding protein binding binding protein domain specific binding molecular function inhibitor activity molecular function regulator activity transcription regulator inhibitor activity fatty acid binding organic acid binding leptomycin B binding ion binding organic cyclic compound binding anion binding lipid binding carboxylic acid binding heterocyclic compound binding monocarboxylic acid binding small molecule binding protein dimerization activity transcription factor binding bHLH transcription factor binding DNA-binding transcription factor 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 developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development cellular developmental process cell differentiation negative regulation of DNA-binding transcription factor activity negative regulation of molecular function regulation of molecular function regulation of DNA-binding transcription factor activity central nervous system development nervous system development positive regulation of biological process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process positive regulation of macromolecule metabolic process positive regulation of cellular process positive regulation of gene expression positive regulation of cellular biosynthetic process regulation of developmental process negative regulation of developmental process regulation of cell differentiation muscle structure development negative regulation of myoblast differentiation regulation of myoblast differentiation negative regulation of cell differentiation myoblast differentiation regulation of osteoblast differentiation negative regulation of osteoblast differentiation osteoblast differentiation ossification DNA metabolic process DNA replication regulation of DNA replication regulation of DNA metabolic process positive regulation of programmed cell death regulation of apoptotic process regulation of programmed cell death cell death positive regulation of apoptotic process apoptotic process programmed cell death muscle organ development epithelium development tissue development epithelial cell differentiation generation of neurons neurogenesis neuron differentiation rhythmic process circadian regulation of gene expression circadian rhythm anatomical structure morphogenesis odontogenesis animal organ morphogenesis metanephros development kidney development renal system development embryonic organ development embryo development notochord development cellular response to stimulus response to organic substance response to stimulus response to lipid response to fatty acid cellular response to organic cyclic compound response to oxygen-containing compound cellular response to oxygen-containing compound cellular response to fatty acid cellular response to chemical stimulus response to chemical cellular response to lipid cellular response to organic substance cellular response to leptomycin B response to leptomycin B response to organic cyclic compound negative regulation of gene expression transcription by RNA polymerase II regulation of transcription by RNA polymerase II negative regulation of transcription by RNA polymerase II	intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR026052	DNA-binding protein inhibitor	Family
A, B	IPR011598	Myc-type, basic helix-loop-helix (bHLH) domain	Domain
A, B	IPR036638	Helix-loop-helix DNA-binding domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: Q02535	Burkitt lymphoma granular cell carcinoma thyroid gland disease adenocarcinoma B-cell chronic lymphocytic leukemia carcinoma Mammary Neoplasms, Experimental prostate cancer sarcomatoid carcinoma tubular adenocarcinoma malignant colon neoplasm nervous system disorder peripheral nervous system disease Down syndrome pilocytic astrocytoma Burkitt lymphoma granular cell carcinoma thyroid gland disease adenocarcinoma B-cell chronic lymphocytic leukemia carcinoma Mammary Neoplasms, Experimental prostate cancer sarcomatoid carcinoma tubular adenocarcinoma malignant colon neoplasm nervous system disorder peripheral nervous system disease Down syndrome pilocytic astrocytoma ischemia reperfusion injury lung cancer ulcerative colitis malignant ependymoma adrenoleukodystrophy mammary neoplasms, animal myocardial ischemia non-small cell lung carcinoma ovarian cancer coronary artery disease pancreatic intraductal papillary-mucinous neoplasm Crohn disease peripheral neuropathy facioscapulohumeral muscular dystrophy pituitary cancer hydrolethalus syndrome lung adenocarcinoma tuberculosis undifferentiated carcinoma malignant glioma malignant pancreatic neoplasm astrocytic tumor benign colon neoplasm nephrosclerosis oligodendroglioma pancreatic ductal adenocarcinoma cribriform carcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia diabetes mellitus Pick disease glioblastoma interstitial cystitis lung benign neoplasm malignant mesothelioma atypical teratoid rhabdoid tumor medulloblastoma osteosarcoma colonic neoplasm pancreatic intraductal papillary-mucinous carcinoma cribriform carcinoma of breast

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.