2LFH | pdb_00002lfh

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)
B	FeoB_Cyto	e2lfhB1	A: a/b three-layered sandwiches	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: FeoB_Cyto	ECOD (v294.1)
A	Ras	e2lfhA1	A: a/b three-layered sandwiches	X: EF-hand	H: Insect pheromone/odorant-binding proteins	T: Insect pheromone/odorant-binding proteins	F: Ras	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
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)
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)

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 transcription corepressor activity transcription regulator activity transcription coregulator activity fatty acid binding organic acid binding leptomycin B binding ion binding anion binding protein binding binding protein domain specific binding molecular function inhibitor activity molecular function regulator activity transcription regulator inhibitor activity transcription corepressor activity transcription regulator activity transcription coregulator activity fatty acid binding organic acid binding leptomycin B binding ion 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 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 developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development rhythmic process circadian rhythm central nervous system development nervous system development positive regulation of biological process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of gene expression positive regulation of biosynthetic process positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of developmental process cellular developmental process negative regulation of developmental process regulation of cell differentiation muscle structure development negative regulation of myoblast differentiation cell 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 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 lipid response to stimulus response to fatty acid 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 leptomycin B response to leptomycin B 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	cellular anatomical structure intracellular anatomical structure cytoplasm 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 malignant colon neoplasm tubular adenocarcinoma nervous system disorder Down syndrome peripheral nervous system disease pilocytic astrocytoma Burkitt lymphoma granular cell carcinoma thyroid gland disease adenocarcinoma B-cell chronic lymphocytic leukemia carcinoma Mammary Neoplasms, Experimental prostate cancer sarcomatoid carcinoma malignant colon neoplasm tubular adenocarcinoma nervous system disorder Down syndrome peripheral nervous system disease pilocytic astrocytoma ischemia reperfusion injury lung cancer malignant ependymoma ulcerative colitis adrenoleukodystrophy mammary neoplasms, animal myocardial ischemia non-small cell lung carcinoma coronary artery disease ovarian cancer Crohn disease pancreatic intraductal papillary-mucinous neoplasm facioscapulohumeral muscular dystrophy peripheral neuropathy hydrolethalus syndrome pituitary cancer lung adenocarcinoma tuberculosis malignant glioma undifferentiated carcinoma malignant pancreatic neoplasm astrocytic tumor benign colon neoplasm nephrosclerosis oligodendroglioma cribriform carcinoma pancreatic ductal adenocarcinoma diabetes mellitus pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia glioblastoma Pick disease interstitial cystitis lung benign neoplasm malignant mesothelioma atypical teratoid rhabdoid tumor medulloblastoma colonic neoplasm osteosarcoma cribriform carcinoma of breast pancreatic intraductal papillary-mucinous carcinoma

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.