Annotations: 3U5V

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	HLH helix-loop-helix DNA-binding domain	8082574	4000913	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	HLH helix-loop-helix DNA-binding domain	8082575	3001962	SCOP2 (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	HLH	e3u5vA1	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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	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	Protein max, Transcription factor E2-alpha chimera	DNA-binding transcription factor activity, RNA polymerase II-specific DNA-binding transcription repressor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription repressor activity DNA-binding transcription factor activity DNA binding sequence-specific DNA binding binding double-stranded DNA binding nucleic acid binding RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding DNA-binding transcription factor activity, RNA polymerase II-specific DNA-binding transcription repressor activity, RNA polymerase II-specific transcription regulator activity DNA-binding transcription repressor activity DNA-binding transcription factor activity DNA binding sequence-specific DNA binding binding double-stranded DNA binding nucleic acid binding RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding organic cyclic compound binding transcription regulatory region nucleic acid binding RNA polymerase II cis-regulatory region sequence-specific DNA binding protein-containing complex binding transcription factor binding protein binding DNA-binding transcription factor binding E-box binding protein dimerization activity identical protein binding vitamin D response element binding RNA polymerase II-specific DNA-binding transcription factor binding protein heterodimerization activity protein homodimerization activity kinase binding mitogen-activated protein kinase kinase kinase binding enzyme binding protein kinase binding DNA-binding transcription activator activity, RNA polymerase II-specific DNA-binding transcription activator activity bHLH transcription factor binding	response to stimulus response to stress response to wounding response to axon injury cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular process cellular component organization or biogenesis cellular response to stimulus cellular response to nitrogen compound response to organic substance response to stimulus response to stress response to wounding response to axon injury cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular process cellular component organization or biogenesis cellular response to stimulus cellular response to nitrogen compound response to organic substance response to endogenous stimulus response to organonitrogen compound response to peptide hormone cellular response to peptide hormone stimulus response to oxygen-containing compound response to nitrogen compound cellular response to oxygen-containing compound cellular response to endogenous stimulus cellular response to chemical stimulus cellular response to organonitrogen compound response to hormone response to chemical cellular response to organic substance cellular response to hormone stimulus developmental process multicellular organismal process sensory organ development eye development animal organ development retina development in camera-type eye visual system development multicellular organism development camera-type eye development anatomical structure development sensory system development system development response to extracellular stimulus response to nutrient levels response to external stimulus cellular response to starvation cell communication cellular response to nutrient levels cellular response to stress cellular response to extracellular stimulus response to starvation cellular response to external stimulus regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process regulation of nitrogen compound metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process heterocycle metabolic process organic substance biosynthetic process nitrogen compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation cellular nitrogen compound metabolic process primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process heterocycle biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process aromatic compound biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process cellular aromatic compound metabolic process neuron apoptotic process apoptotic process cell death programmed cell death response to insulin 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 nitrogen compound metabolic process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process transcription by RNA polymerase II regulation of transcription by RNA polymerase II negative regulation of biological process negative regulation of cellular metabolic process negative regulation of cellular process negative regulation of macromolecule metabolic process negative regulation of metabolic process negative regulation of cellular biosynthetic process negative regulation of gene expression negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of nitrogen compound metabolic process negative regulation of RNA biosynthetic process negative regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II negative regulation of RNA metabolic process positive regulation of transcription by RNA polymerase II cell cycle regulation of cell cycle positive regulation of cell cycle cellular developmental process hemopoiesis B cell activation cell activation cell development mononuclear cell differentiation lymphocyte differentiation lymphocyte activation leukocyte activation B cell differentiation cell differentiation immune system process leukocyte differentiation B cell lineage commitment cell fate commitment positive regulation of DNA-binding transcription factor activity positive regulation of molecular function regulation of molecular function regulation of DNA-binding transcription factor activity regulation of developmental process regulation of cell differentiation positive regulation of neuron differentiation positive regulation of developmental process neurogenesis neuron differentiation positive regulation of cell differentiation nervous system development generation of neurons regulation of neuron differentiation positive regulation of cell population proliferation positive regulation of B cell proliferation regulation of leukocyte activation regulation of cell activation leukocyte proliferation positive regulation of lymphocyte activation positive regulation of cell activation regulation of B cell proliferation lymphocyte proliferation regulation of B cell activation positive regulation of leukocyte activation positive regulation of mononuclear cell proliferation regulation of multicellular organismal process regulation of immune system process positive regulation of immune system process regulation of lymphocyte proliferation regulation of leukocyte proliferation cell population proliferation positive regulation of lymphocyte proliferation B cell proliferation positive regulation of B cell activation regulation of cell population proliferation mononuclear cell proliferation positive regulation of leukocyte proliferation regulation of mononuclear cell proliferation positive regulation of multicellular organismal process regulation of lymphocyte activation regulation of cell cycle phase transition regulation of cell cycle process cell cycle phase transition regulation of cell cycle G1/S phase transition cell cycle G1/S phase transition mitotic cell cycle regulation of mitotic cell cycle phase transition regulation of mitotic cell cycle regulation of G1/S transition of mitotic cell cycle mitotic cell cycle process G1/S transition of mitotic cell cycle cell cycle process mitotic cell cycle phase transition immune system development immunoglobulin production somatic cell DNA recombination V(D)J recombination somatic recombination of immunoglobulin gene segments somatic diversification of immune receptors production of molecular mediator of immune response DNA recombination DNA metabolic process somatic diversification of immunoglobulins immunoglobulin V(D)J recombination somatic diversification of immune receptors via germline recombination within a single locus	RNA polymerase II transcription regulator complex membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex transcription regulator complex intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle organelle Mad-Max complex RNA polymerase II transcription repressor complex transcription repressor complex RNA polymerase II transcription regulator complex membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex transcription regulator complex intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle organelle Mad-Max complex RNA polymerase II transcription repressor complex transcription repressor complex somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection protein-DNA complex intracellular non-membrane-bounded organelle chromatin chromosome non-membrane-bounded organelle Myc-Max complex histone methyltransferase complex catalytic complex membrane-enclosed lumen MLL1/2 complex transferase complex intracellular organelle lumen MLL1 complex nucleoplasm organelle lumen methyltransferase complex nuclear lumen nuclear body PML body cytoplasm euchromatin

InterPro: Protein Family Classification InterPro Database Homepage

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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P15923	Burkitt lymphoma Precursor B-Cell Lymphoblastic Leukemia-Lymphoma agammaglobulinemia Hodgkins lymphoma large cell medulloblastoma lung cancer malignant glioma non-small cell lung carcinoma acute lymphoblastic leukemia ovarian cancer agammaglobulinemia 8, autosomal dominant autosomal agammaglobulinemia cancer sarcoidosis ductal breast carcinoma in situ Burkitt lymphoma Precursor B-Cell Lymphoblastic Leukemia-Lymphoma agammaglobulinemia Hodgkins lymphoma large cell medulloblastoma lung cancer malignant glioma non-small cell lung carcinoma acute lymphoblastic leukemia ovarian cancer agammaglobulinemia 8, autosomal dominant autosomal agammaglobulinemia cancer sarcoidosis ductal breast carcinoma in situ Huntington disease malignant colon neoplasm malignant mesothelioma oligodendroglioma pancreatic ductal adenocarcinoma astrocytic tumor autosomal recessive agammaglobulinemia 1 primitive neuroectodermal tumor childhood acute lymphoblastic leukemia subependymal giant cell astrocytoma glioblastoma lung adenocarcinoma malignant ependymoma medulloblastoma osteosarcoma pancreatic intraductal papillary-mucinous carcinoma atypical teratoid rhabdoid tumor psoriasis colorectal cancer tuberculosis hematologic disease

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.