Annotations: 8G04

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	4-helical cytokines	8035563	3001717	SCOP2B (2022-06-29)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, C	PF09067	Erythropoietin receptor, ligand binding (EpoR_lig-bind)	Erythropoietin receptor, ligand binding	Members of this family interact with erythropoietin (EPO), with subsequent initiation of the downstream chain of events associated with binding of EPO to the receptor, including EPO-induced erythroblast proliferation and differentiation through induc ...	Members of this family interact with erythropoietin (EPO), with subsequent initiation of the downstream chain of events associated with binding of EPO to the receptor, including EPO-induced erythroblast proliferation and differentiation through induction of the JAK2/STAT5 signaling cascade. The domain adopts a secondary structure composed of a short amino-terminal helix, followed by two beta-sandwich regions [1].	Domain
A	PF00758	Erythropoietin/thrombopoietin (EPO_TPO)	Erythropoietin/thrombopoietin		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, C	Thrombopoietin receptor	thrombopoietin receptor activity molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity	multicellular organismal process regulation of cellular process positive regulation of cell population proliferation regulation of leukocyte activation positive regulation of biological process regulation of cell activation lymphocyte activation leukocyte proliferation leukocyte activation positive regulation of lymphocyte activation positive regulation of cell activation lymphocyte proliferation positive regulation of leukocyte activation positive regulation of mononuclear cell proliferation multicellular organismal process regulation of cellular process positive regulation of cell population proliferation regulation of leukocyte activation positive regulation of biological process regulation of cell activation lymphocyte activation leukocyte proliferation leukocyte activation positive regulation of lymphocyte activation positive regulation of cell activation lymphocyte proliferation positive regulation of leukocyte activation positive regulation of mononuclear cell proliferation regulation of immune system process regulation of multicellular organismal process positive regulation of immune system process positive regulation of cellular process regulation of lymphocyte proliferation regulation of leukocyte proliferation regulation of biological process cell population proliferation biological regulation cell activation positive regulation of lymphocyte proliferation regulation of cell population proliferation mononuclear cell proliferation immune system process positive regulation of leukocyte proliferation regulation of mononuclear cell proliferation positive regulation of multicellular organismal process cellular process regulation of lymphocyte activation cellular response to stimulus response to stimulus cell surface receptor signaling pathway signaling thrombopoietin-mediated signaling pathway response to cytokine response to chemokine cytokine-mediated signaling pathway cellular response to chemokine chemokine-mediated signaling pathway cell communication response to peptide response to chemical G protein-coupled receptor signaling pathway cellular response to cytokine stimulus signal transduction response to decreased oxygen levels cellular response to oxygen levels cellular response to hypoxia cellular response to decreased oxygen levels cellular response to chemical stimulus cellular response to stress response to hypoxia response to stress response to oxygen levels response to abiotic stimulus multicellular organismal-level homeostasis leukocyte homeostasis homeostatic process homeostasis of number of cells myeloid cell homeostasis neutrophil homeostasis regulation of developmental process cellular developmental process regulation of platelet formation platelet morphogenesis cell development regulation of cell differentiation cell morphogenesis regulation of cell morphogenesis regulation of cell development positive regulation of platelet formation positive regulation of developmental process multicellular organism development positive regulation of cell differentiation cell differentiation anatomical structure development regulation of anatomical structure morphogenesis developmental process regulation of multicellular organismal development hemopoiesis regulation of myeloid cell differentiation positive regulation of cell development positive regulation of cell morphogenesis anatomical structure morphogenesis myeloid cell differentiation platelet formation anatomical structure formation involved in morphogenesis positive regulation of myeloid cell differentiation regulation of hemopoiesis monocyte homeostasis eosinophil homeostasis basophil homeostasis	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane membrane-bounded organelle intracellular organelle intracellular anatomical structure Golgi apparatus organelle cytoplasm intracellular membrane-bounded organelle cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane membrane-bounded organelle intracellular organelle intracellular anatomical structure Golgi apparatus organelle cytoplasm intracellular membrane-bounded organelle endomembrane system nuclear membrane nucleus organelle envelope nuclear envelope organelle membrane somatodendritic compartment cell body neuronal cell body
A	Thrombopoietin	protein binding binding signaling receptor binding molecular function activator activity molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity hormone activity growth factor activity	regulation of biological process cell population proliferation regulation of cellular process positive regulation of cell population proliferation regulation of cell population proliferation biological regulation positive regulation of biological process cellular process positive regulation of cellular process developmental process cellular developmental process hemopoiesis megakaryocyte differentiation cell development regulation of biological process cell population proliferation regulation of cellular process positive regulation of cell population proliferation regulation of cell population proliferation biological regulation positive regulation of biological process cellular process positive regulation of cellular process developmental process cellular developmental process hemopoiesis megakaryocyte differentiation cell development myeloid cell differentiation cell differentiation megakaryocyte development anatomical structure development myeloid cell development cellular response to stimulus positive regulation of cell communication positive regulation of signal transduction response to stimulus signaling regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette signal transduction regulation of signaling positive regulation of MAPK cascade positive regulation of intracellular signal transduction regulation of MAPK cascade regulation of response to stimulus MAPK cascade regulation of cell communication positive regulation of signaling positive regulation of ERK1 and ERK2 cascade ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade multicellular organismal process regulation of developmental process regulation of megakaryocyte differentiation regulation of cell differentiation regulation of cell development positive regulation of developmental process multicellular organism development positive regulation of cell differentiation regulation of immune system process regulation of multicellular organismal process positive regulation of megakaryocyte differentiation regulation of multicellular organismal development regulation of myeloid cell differentiation immune system process positive regulation of myeloid cell differentiation regulation of hemopoiesis cell surface receptor signaling pathway thrombopoietin-mediated signaling pathway response to cytokine response to chemokine cytokine-mediated signaling pathway cellular response to chemokine chemokine-mediated signaling pathway response to peptide response to chemical G protein-coupled receptor signaling pathway cellular response to cytokine stimulus cell surface receptor signaling pathway via STAT positive regulation of phosphorylation regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of phosphate metabolic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process phosphate-containing compound metabolic process positive regulation of macromolecule metabolic process protein metabolic process positive regulation of protein phosphorylation phosphorus metabolic process protein modification process protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of protein metabolic process primary metabolic process regulation of macromolecule metabolic process macromolecule modification metabolic process regulation of phosphorus metabolic process regulation of phosphorylation macromolecule metabolic process regulation of metabolic process regulation of stem cell proliferation positive regulation of stem cell proliferation stem cell proliferation positive regulation of hematopoietic stem cell proliferation hematopoietic stem cell proliferation regulation of hematopoietic stem cell proliferation regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction phosphatidylinositol 3-kinase/protein kinase B signal transduction	cellular anatomical structure extracellular region extracellular space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, C	IPR015152	Growth hormone/erythropoietin receptor, ligand binding	Domain
B, C	IPR003961	Fibronectin type III	Domain
B, C	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B, C	IPR003528	Long hematopoietin receptor, single chain, conserved site	Conserved Site
B, C	IPR036116	Fibronectin type III superfamily	Homologous Superfamily
A	IPR001323	Erythropoietin/thrombopoietin	Family
A	IPR019767	Erythropoietin/thrombopoeitin, conserved site	Conserved Site
A	IPR009079	Four-helical cytokine-like, core	Homologous Superfamily
A	IPR003978	Thrombopoietin	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B, C	Pharos: P40238	primary myelofibrosis congenital amegakaryocytic thrombocytopenia thrombocytosis disease essential thrombocythemia thrombocythemia 2 acquired polycythemia vera medulloblastoma myelofibrosis melanotic medulloblastoma myeloproliferative neoplasm thrombocytopenia childhood medulloblastoma familial thrombocytosis adult medulloblastoma medullomyoblastoma with myogenic differentiation primary myelofibrosis congenital amegakaryocytic thrombocytopenia thrombocytosis disease essential thrombocythemia thrombocythemia 2 acquired polycythemia vera medulloblastoma myelofibrosis melanotic medulloblastoma myeloproliferative neoplasm thrombocytopenia childhood medulloblastoma familial thrombocytosis adult medulloblastoma medullomyoblastoma with myogenic differentiation aleukemic leukemia bone marrow neoplasm familial polycythemia hypertensive disorder acute pancreatitis aplastic anemia desmoplastic/nodular medulloblastoma myelodysplastic syndrome bone marrow disease Chronic idiopathic thrombocytopenic purpura hematopoietic and lymphoid system neoplasm
A	Pharos: P40225	thrombocytosis disease essential thrombocythemia cardiomyopathy familial thrombocytosis thrombocythemia 1 anemia Cardiomyopathies, Primary bone marrow disease hypersplenism bone marrow neoplasm myeloproliferative neoplasm thrombocytopenia

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
B, C	PCA	Parent Component: GLN RESID: AA0031 PSI-MOD : 2-pyrrolidone-5-carboxylic acid (Gln) MOD:00040 , 2-pyrrolidone-5-carboxylic acid (Glu) MOD:00420

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.