Annotations: 1BP3

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1bp3b1	All beta proteins	Immunoglobulin-like beta-sandwich	Fibronectin type III	Fibronectin type III	Prolactin receptor	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d1bp3a_	All alpha proteins	4-helical cytokines	4-helical cytokines	Long-chain cytokines	Growth hormone, somatotropin	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Fibronectin type III	8055131	3002063	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Fibronectin type III	8055515	3002063	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	4-helical cytokines	8037071	3001717	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)
B	Copper-bind	e1bp3B1	A: a/b three-layered sandwiches	X: Phage tail fiber protein trimerization domain	H: beta-Prism I	T: beta-Prism I	F: Copper-bind	ECOD (v294.1)
A		e1bp3A1	A: a/b three-layered sandwiches	X: ETN0001 domain-like	H: Flavivirus capsid protein C	T: Flavivirus capsid protein C	F:	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	1.20.1250.10	Mainly Alpha	Up-down Bundle	Growth Hormone	Chain: A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00103	Somatotropin hormone family (Hormone_1)	Somatotropin hormone family		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	PROTEIN (PROLACTIN RECEPTOR)	protein binding binding cytokine binding kinase binding enzyme binding protein kinase binding lipid binding peptide hormone binding hormone binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity protein binding binding cytokine binding kinase binding enzyme binding protein kinase binding lipid binding peptide hormone binding hormone binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity prolactin receptor activity cation binding ion binding metal ion binding small molecule binding	regulation of biological process cell adhesion regulation of cellular process regulation of cell adhesion biological regulation cellular process cellular response to stimulus cell surface receptor signaling pathway response to stimulus signaling response to cytokine cytokine-mediated signaling pathway cell communication response to peptide regulation of biological process cell adhesion regulation of cellular process regulation of cell adhesion biological regulation cellular process cellular response to stimulus cell surface receptor signaling pathway response to stimulus signaling response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus signal transduction developmental process mammary gland epithelial cell differentiation epithelium development cellular developmental process mammary gland development gland development animal organ development tissue development epithelial cell differentiation mammary gland epithelium development cell differentiation anatomical structure development biosynthetic process steroid metabolic process lipid biosynthetic process primary metabolic process metabolic process steroid biosynthetic process lipid metabolic process negative regulation of programmed cell death regulation of apoptotic process negative regulation of biological process regulation of programmed cell death cell death negative regulation of apoptotic process negative regulation of cellular process apoptotic process programmed cell death multicellular organism development multicellular organismal process multi-multicellular organism process reproductive process female pregnancy embryo implantation multi-organism reproductive process cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation positive regulation of biological process positive regulation of cellular process response to granulocyte macrophage colony-stimulating factor cellular response to granulocyte macrophage colony-stimulating factor stimulus cell surface receptor signaling pathway via STAT cell surface receptor signaling pathway via JAK-STAT homeostatic process adaptive thermogenesis multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis positive regulation of multicellular organismal process regulation of multicellular organismal process biological process involved in interspecies interaction between organisms response to other organism response to bacterium response to external stimulus response to external biotic stimulus response to biotic stimulus regulation of body fluid levels secretion transport establishment of localization body fluid secretion localization lactation regulation of biological quality positive regulation of B cell proliferation regulation of leukocyte activation regulation of cell activation lymphocyte activation leukocyte proliferation leukocyte activation 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 immune system process positive regulation of immune system process regulation of lymphocyte proliferation regulation of leukocyte proliferation B cell activation cell activation positive regulation of lymphocyte proliferation B cell proliferation positive regulation of B cell activation mononuclear cell proliferation immune system process positive regulation of leukocyte proliferation regulation of mononuclear cell proliferation regulation of lymphocyte activation positive regulation of cell communication positive regulation of signal transduction positive regulation of phosphorylation regulation of catalytic activity positive regulation of receptor signaling pathway via STAT regulation of signal transduction regulation of transferase activity positive regulation of phosphate metabolic process regulation of primary metabolic process positive regulation of metabolic process peptidyl-amino acid modification phosphate-containing compound metabolic process regulation of receptor signaling pathway via JAK-STAT positive regulation of macromolecule metabolic process protein modification process phosphorus metabolic process positive regulation of protein phosphorylation protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of protein metabolic process regulation of molecular function positive regulation of kinase activity regulation of kinase activity regulation of response to stimulus activation of protein kinase activity macromolecule modification regulation of phosphorus metabolic process macromolecule metabolic process regulation of receptor signaling pathway via STAT regulation of metabolic process regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process peptidyl-tyrosine modification positive regulation of receptor signaling pathway via JAK-STAT positive regulation of response to stimulus positive regulation of molecular function positive regulation of protein modification process protein metabolic process positive regulation of protein kinase activity activation of Janus kinase activity regulation of signaling positive regulation of catalytic activity regulation of protein kinase activity regulation of macromolecule metabolic process regulation of cell communication regulation of phosphorylation peptidyl-tyrosine phosphorylation positive regulation of signaling reproductive system development developmental growth prostate gland development growth urogenital system development organ growth developmental process involved in reproduction reproductive structure development prostate gland growth system development cell surface receptor protein tyrosine kinase signaling pathway cellular component biogenesis cellular component assembly activation of transmembrane receptor protein tyrosine kinase activity cellular component organization protein-containing complex assembly cellular component organization or biogenesis enzyme-linked receptor protein signaling pathway protein-containing complex organization mammary gland lobule development mammary gland alveolus development regulation of multicellular organismal development regulation of developmental process regulation of cell differentiation regulation of epithelial cell differentiation	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane protein-containing complex receptor complex extracellular region membrane-bounded organelle intracellular anatomical structure endosome intracellular vesicle cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane protein-containing complex receptor complex extracellular region membrane-bounded organelle intracellular anatomical structure endosome intracellular vesicle membrane-enclosed lumen intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen intracellular organelle cytoplasmic vesicle organelle lumen organelle cytoplasm endosome lumen vesicle
A	PROTEIN (GROWTH HORMONE)	molecular function activator activity molecular function regulator activity signaling receptor regulator activity growth factor activity receptor ligand activity signaling receptor activator activity growth hormone receptor binding protein binding binding signaling receptor binding cytokine receptor binding hormone receptor binding prolactin receptor binding hormone activity molecular function activator activity molecular function regulator activity signaling receptor regulator activity growth factor activity receptor ligand activity signaling receptor activator activity growth hormone receptor binding protein binding binding signaling receptor binding cytokine receptor binding hormone receptor binding prolactin receptor binding hormone activity growth hormone activity cytokine activity cation binding ion binding metal ion binding small molecule binding	cellular response to stimulus cellular response to nitrogen compound regulation of cellular process response to stimulus signaling response to peptide hormone cellular response to growth hormone stimulus cell surface receptor protein tyrosine kinase signaling pathway cell communication cellular response to endogenous stimulus response to hormone growth hormone receptor signaling pathway via JAK-STAT signal transduction enzyme-linked receptor protein signaling pathway cellular response to stimulus cellular response to nitrogen compound regulation of cellular process response to stimulus signaling response to peptide hormone cellular response to growth hormone stimulus cell surface receptor protein tyrosine kinase signaling pathway cell communication cellular response to endogenous stimulus response to hormone growth hormone receptor signaling pathway via JAK-STAT signal transduction enzyme-linked receptor protein signaling pathway cellular response to hormone stimulus regulation of biological process growth hormone receptor signaling pathway cell surface receptor signaling pathway response to endogenous stimulus biological regulation cellular response to peptide hormone stimulus response to oxygen-containing compound response to nitrogen compound cellular response to oxygen-containing compound response to growth hormone cellular response to chemical stimulus response to chemical cellular process response to cytokine cytokine-mediated signaling pathway response to peptide cellular response to cytokine stimulus developmental process animal organ development anatomical structure development cell surface receptor signaling pathway via STAT positive regulation of cell communication regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction positive regulation of signal transduction positive regulation of biological process regulation of signal transduction intracellular signal transduction positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette positive regulation of cellular process regulation of signaling positive regulation of intracellular signal transduction positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction regulation of response to stimulus regulation of cell communication phosphatidylinositol 3-kinase/protein kinase B signal transduction positive regulation of signaling cell surface receptor signaling pathway via JAK-STAT positive regulation of insulin-like growth factor receptor signaling pathway regulation of insulin-like growth factor receptor signaling pathway insulin-like growth factor receptor signaling pathway positive regulation of MAPK cascade regulation of MAPK cascade MAPK cascade positive regulation of receptor signaling pathway via STAT positive regulation of receptor signaling pathway via JAK-STAT regulation of receptor signaling pathway via JAK-STAT regulation of receptor signaling pathway via STAT regulation of multicellular organism growth multicellular organismal process regulation of growth regulation of developmental growth regulation of developmental process developmental growth growth positive regulation of multicellular organism growth positive regulation of developmental process multicellular organism growth positive regulation of growth positive regulation of multicellular organismal process regulation of multicellular organismal process positive regulation of developmental growth response to nutrient levels regulation of localization hexose transmembrane transport regulation of transport transport carbohydrate transport establishment of localization positive regulation of D-glucose transmembrane transport transmembrane transport localization regulation of transmembrane transport positive regulation of transport D-glucose transmembrane transport positive regulation of transmembrane transport regulation of D-glucose transmembrane transport monosaccharide transmembrane transport carbohydrate transmembrane transport bone maturation developmental maturation multicellular organism development skeletal system development anatomical structure maturation animal organ maturation bone development system development response to lipid response to estradiol	protein-containing complex growth hormone receptor complex receptor complex cellular anatomical structure extracellular region extracellular space membrane-bounded organelle intracellular anatomical structure endosome intracellular vesicle membrane-enclosed lumen intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen protein-containing complex growth hormone receptor complex receptor complex cellular anatomical structure extracellular region extracellular space membrane-bounded organelle intracellular anatomical structure endosome intracellular vesicle membrane-enclosed lumen intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen intracellular organelle cytoplasmic vesicle organelle lumen organelle cytoplasm endosome lumen vesicle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR015152	Growth hormone/erythropoietin receptor, ligand binding	Domain
B	IPR050379	Type I Cytokine Receptor	Family
B	IPR003961	Fibronectin type III	Domain
B	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B	IPR003528	Long hematopoietin receptor, single chain, conserved site	Conserved Site
B	IPR036116	Fibronectin type III superfamily	Homologous Superfamily
A	IPR001400	Somatotropin/prolactin	Family
A	IPR018116	Somatotropin hormone, conserved site	Conserved Site
A	IPR034975	Somatotropin	Family
A	IPR009079	Four-helical cytokine-like, core	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B	Pharos: P16471	multiple fibroadenoma of the breast endometriosis acquired hyperprolactinemia sarcomatoid carcinoma carcinoma hyperprolactinemia Mammary Neoplasms, Experimental medulloblastoma osteosarcoma undifferentiated carcinoma malignant glioma mammary neoplasms, animal pituitary cancer breast carcinoma invasive ductal breast carcinoma multiple fibroadenoma of the breast endometriosis acquired hyperprolactinemia sarcomatoid carcinoma carcinoma hyperprolactinemia Mammary Neoplasms, Experimental medulloblastoma osteosarcoma undifferentiated carcinoma malignant glioma mammary neoplasms, animal pituitary cancer breast carcinoma invasive ductal breast carcinoma malignant pancreatic neoplasm nasopharyngeal carcinoma psoriasis ulcerative colitis autism breast fibroadenoma ductal breast carcinoma in situ familial hyperprolactinemia
A	Pharos: P01241	acromegaly isolated growth hormone deficiency type II short stature due to growth hormone qualitative anomaly isolated growth hormone deficiency type IB isolated growth hormone deficiency type IA muscular atrophy polycythemia Turner syndrome Mammary Neoplasms, Experimental pituitary adenocarcinoma pituitary gland adenoma obesity disorder pituitary cancer cardiovascular disease growth hormone-producing pituitary gland adenoma acromegaly isolated growth hormone deficiency type II short stature due to growth hormone qualitative anomaly isolated growth hormone deficiency type IB isolated growth hormone deficiency type IA muscular atrophy polycythemia Turner syndrome Mammary Neoplasms, Experimental pituitary adenocarcinoma pituitary gland adenoma obesity disorder pituitary cancer cardiovascular disease growth hormone-producing pituitary gland adenoma primary ovarian failure short stature due to partial GHR deficiency diabetes mellitus isolated congenital growth hormone deficiency pituitary tumor psoriasis osteogenesis imperfecta depressive disorder genetic endocrine growth 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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.