Annotations: 2YPB

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	8076573	4000913	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	HLH helix-loop-helix DNA-binding domain	8076574	3001962	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	HLH helix-loop-helix DNA-binding domain	8076578	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)
A	PF00010	e2ypbA1	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: PF00010	ECOD (1.6)
B	PF00010	e2ypbB1	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: PF00010	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	PF00010	Helix-loop-helix DNA-binding domain (HLH)	Helix-loop-helix DNA-binding domain	-	Domain
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	T-CELL ACUTE LYMPHOCYTIC LEUKEMIA PROTEIN 1	DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding binding double-stranded DNA binding organic cyclic compound binding nucleic acid binding transcription regulatory region nucleic acid binding histone deacetylase binding protein binding enzyme binding transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding binding double-stranded DNA binding organic cyclic compound binding nucleic acid binding transcription regulatory region nucleic acid binding histone deacetylase binding protein binding enzyme binding transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding DNA-binding transcription factor binding RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding RNA polymerase II cis-regulatory region sequence-specific DNA binding protein-containing complex binding chromatin binding transcription regulator activity DNA-binding transcription factor activity DNA-binding transcription factor activity, RNA polymerase II-specific E-box binding protein dimerization activity	behavior multicellular organismal process locomotory behavior developmental process cellular developmental process hemopoiesis megakaryocyte differentiation cell development myeloid cell differentiation cell differentiation megakaryocyte development anatomical structure development myeloid cell development cellular process behavior multicellular organismal process locomotory behavior developmental process cellular developmental process hemopoiesis megakaryocyte differentiation cell development myeloid cell differentiation cell differentiation megakaryocyte development anatomical structure development myeloid cell development cellular process blood vessel morphogenesis tube development angiogenesis vasculature development circulatory system development multicellular organism development anatomical structure morphogenesis tube morphogenesis anatomical structure formation involved in morphogenesis blood vessel development system development cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription organic cyclic compound metabolic process nucleic acid biosynthetic process transcription by RNA polymerase II organic substance metabolic process biosynthetic process organic cyclic compound biosynthetic process organic substance biosynthetic process metabolic process macromolecule metabolic process regulation of biological process positive regulation of cellular component organization regulation of cellular process regulation of cellular component organization protein-containing complex organization positive regulation of cellular component biogenesis biological regulation positive regulation of biological process regulation of cellular component biogenesis cellular component organization cellular component biogenesis positive regulation of protein-containing complex assembly regulation of protein-containing complex assembly cellular component assembly protein-containing complex assembly cellular component organization or biogenesis positive regulation of cellular process astrocyte differentiation nervous system development neurogenesis astrocyte fate commitment central nervous system development gliogenesis glial cell differentiation glial cell fate commitment cell fate commitment positive regulation of cell division cell division regulation of cell division myeloid leukocyte differentiation regulation of leukocyte differentiation regulation of developmental process regulation of cell differentiation regulation of cell development regulation of immune system process regulation of multicellular organismal process regulation of mast cell differentiation regulation of multicellular organismal development regulation of myeloid cell differentiation regulation of myeloid leukocyte differentiation immune system process regulation of hemopoiesis mast cell differentiation leukocyte differentiation animal organ development embryo development embryonic hemopoiesis embryonic organ development stem cell differentiation hematopoietic stem cell differentiation hematopoietic progenitor cell differentiation platelet morphogenesis cell morphogenesis platelet formation positive regulation of organelle organization regulation of chromatin organization chromosome organization regulation of chromosome organization regulation of organelle organization positive regulation of chromosome organization protein-DNA complex organization organelle organization chromatin organization positive regulation of chromatin organization homeostatic process positive regulation of developmental process positive regulation of cell differentiation myeloid cell homeostasis erythrocyte homeostasis erythrocyte differentiation regulation of erythrocyte differentiation positive regulation of erythrocyte differentiation multicellular organismal-level homeostasis positive regulation of myeloid cell differentiation homeostasis of number of cells spinal cord association neuron differentiation dorsal spinal cord development cell differentiation in spinal cord generation of neurons central nervous system neuron differentiation spinal cord development neuron differentiation mesodermal cell differentiation mesoderm morphogenesis primitive hemopoiesis hemangioblast cell differentiation mesoderm formation mesoderm development formation of primary germ layer embryonic morphogenesis tissue development gastrulation tissue morphogenesis positive regulation of macromolecule biosynthetic process regulation of primary metabolic process positive regulation of metabolic process regulation of RNA metabolic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of nucleobase-containing compound metabolic process regulation of cellular metabolic process positive regulation of RNA metabolic process regulation of gene expression regulation of macromolecule biosynthetic process regulation of DNA-templated transcription regulation of metabolic process positive regulation of DNA-templated transcription positive regulation of cellular metabolic process positive regulation of biosynthetic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of macromolecule metabolic process regulation of cellular biosynthetic process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process cell population proliferation regulation of cell population proliferation definitive hemopoiesis regulation of transcription by RNA polymerase II 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 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 cell cycle mitotic cell cycle regulation of mitotic cell cycle positive regulation of mitotic cell cycle cell cycle regulation of cell cycle basophil differentiation granulocyte differentiation positive regulation of transcription by RNA polymerase II erythrocyte development erythrocyte maturation developmental maturation anatomical structure maturation cell maturation regulation of somatic stem cell population maintenance regulation of stem cell population maintenance stem cell population maintenance somatic stem cell population maintenance maintenance of cell number	protein-containing complex transcription regulator complex membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen protein-containing complex transcription regulator complex membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen protein-DNA complex intracellular non-membrane-bounded organelle chromatin chromosome non-membrane-bounded organelle
B	TRANSCRIPTION FACTOR E2-ALPHA	DNA binding sequence-specific DNA binding vitamin D response element 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 DNA-binding transcription factor activity, RNA polymerase II-specific DNA binding sequence-specific DNA binding vitamin D response element 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 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 transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding protein binding DNA-binding transcription factor binding protein heterodimerization activity protein dimerization activity identical protein binding protein homodimerization activity E-box binding 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	regulation of biological process regulation of cellular process biological regulation positive regulation of biological process cellular process cell cycle regulation of cell cycle positive regulation of cell cycle positive regulation of cellular process developmental process multicellular organismal process cellular developmental process hemopoiesis B cell activation regulation of biological process regulation of cellular process biological regulation positive regulation of biological process cellular process cell cycle regulation of cell cycle positive regulation of cell cycle positive regulation of cellular process developmental process multicellular organismal process 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 anatomical structure development leukocyte differentiation B cell lineage commitment cell fate commitment positive regulation of DNA-binding transcription factor activity cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process positive regulation of molecular function nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process cellular metabolic process primary metabolic process regulation of cellular metabolic 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 regulation of molecular function organic cyclic compound metabolic process regulation of gene expression biosynthetic process regulation of DNA-binding transcription factor activity organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process regulation of developmental process regulation of cell differentiation positive regulation of neuron differentiation positive regulation of developmental process neurogenesis multicellular organism development neuron differentiation positive regulation of cell differentiation system development nervous system development generation of neurons regulation of neuron differentiation 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 cellular metabolic process positive regulation of biosynthetic 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 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 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 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 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 positive regulation of transcription by RNA polymerase II	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 cytoplasm membrane-enclosed lumen intracellular organelle lumen 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 cytoplasm membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen protein-DNA complex intracellular non-membrane-bounded organelle chromatin chromosome non-membrane-bounded organelle euchromatin
C [auth E]	EBOX FORWARD	-	-	-
D [auth F]	EBOX REVERSE	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR040238	Helix-loop-helix protein TAL-like	Family
A	IPR011598	Myc-type, basic helix-loop-helix (bHLH) domain	Domain
A	IPR036638	Helix-loop-helix DNA-binding domain superfamily	Homologous Superfamily
B	IPR011598	Myc-type, basic helix-loop-helix (bHLH) domain	Domain
B	IPR036638	Helix-loop-helix DNA-binding domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P17542	Precursor T-Cell Lymphoblastic Leukemia-Lymphoma acute T cell leukemia acute lymphoblastic leukemia childhood acute lymphoblastic leukemia exocrine pancreatic carcinoma invasive ductal breast carcinoma malignant pancreatic neoplasm psoriasis ductal breast carcinoma in situ hematologic disease large cell medulloblastoma lung adenocarcinoma non-small cell lung carcinoma tuberculosis cancer Precursor T-Cell Lymphoblastic Leukemia-Lymphoma acute T cell leukemia acute lymphoblastic leukemia childhood acute lymphoblastic leukemia exocrine pancreatic carcinoma invasive ductal breast carcinoma malignant pancreatic neoplasm psoriasis ductal breast carcinoma in situ hematologic disease large cell medulloblastoma lung adenocarcinoma non-small cell lung carcinoma tuberculosis cancer endogenous depression interstitial cystitis leukemia, acute lymphocytic, susceptibility to, 1 lung cancer osteosarcoma
B	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 ovarian cancer acute lymphoblastic leukemia agammaglobulinemia 8, autosomal dominant autosomal agammaglobulinemia sarcoidosis cancer 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 ovarian cancer acute lymphoblastic leukemia agammaglobulinemia 8, autosomal dominant autosomal agammaglobulinemia sarcoidosis cancer ductal breast carcinoma in situ Huntington disease malignant colon neoplasm malignant mesothelioma oligodendroglioma pancreatic ductal adenocarcinoma astrocytic tumor primitive neuroectodermal tumor autosomal recessive agammaglobulinemia 1 subependymal giant cell astrocytoma childhood acute lymphoblastic leukemia glioblastoma lung adenocarcinoma malignant ependymoma medulloblastoma osteosarcoma pancreatic intraductal papillary-mucinous carcinoma atypical teratoid rhabdoid tumor psoriasis tuberculosis colorectal cancer hematologic disease

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 R01GM133198.