Annotations: 1BTE

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1bteb_	Small proteins	Snake toxin-like	Snake toxin-like	Extracellular domain of cell surface receptors	Type II activin receptor	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A	d1btea_	Small proteins	Snake toxin-like	Snake toxin-like	Extracellular domain of cell surface receptors	Type II activin receptor	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2 Family	Extracellular domain of cell surface receptors	8026103	4003329	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Snake toxin-like	8038482	3000545	SCOP2 (2022-06-29)
A	SCOP2B Superfamily	Snake toxin-like	8038482	3000545	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	Activin_recp	e1bteB1	A: few secondary structure elements	X: Snake toxin-like (From Topology)	H: Snake toxin-like (From Topology)	T: Snake toxin-like	F: Activin_recp	ECOD (1.6)
A	Activin_recp	e1bteA1	A: few secondary structure elements	X: Snake toxin-like (From Topology)	H: Snake toxin-like (From Topology)	T: Snake toxin-like	F: Activin_recp	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.10.60.10	Mainly Beta	Ribbon	CD59	CD59	CATH (4.3.0)
A	2.10.60.10	Mainly Beta	Ribbon	CD59	CD59	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01064	Activin types I and II receptor domain (Activin_recp)	Activin types I and II receptor domain	This Pfam entry consists of both TGF-beta receptor types. This is an alignment of the hydrophilic cysteine-rich ligand-binding domains, Both receptor types, (type I and II) posses a 9 amino acid cysteine box, with the the consensus CCX{4-5}CN. The t ...	This Pfam entry consists of both TGF-beta receptor types. This is an alignment of the hydrophilic cysteine-rich ligand-binding domains, Both receptor types, (type I and II) posses a 9 amino acid cysteine box, with the the consensus CCX{4-5}CN. The type I receptors also possess 7 extracellular residues preceding the cysteine box.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	PROTEIN (ACTIVIN RECEPTOR TYPE II)	molecular transducer activity coreceptor activity signaling receptor activity protein-containing complex binding activin binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding molecular transducer activity coreceptor activity signaling receptor activity protein-containing complex binding activin binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding protein serine/threonine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity activin receptor activity transferase activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups transmembrane receptor protein serine/threonine kinase activity transmembrane receptor protein kinase activity transmembrane signaling receptor activity catalytic activity cation binding metal ion binding protein binding PDZ domain binding protein domain specific binding inhibin binding growth factor binding BMP receptor activity	developmental process multicellular organismal process gonad development reproductive system development reproductive process sex differentiation animal organ development developmental process involved in reproduction male gonad development male sex differentiation multicellular organism development development of primary male sexual characteristics development of primary sexual characteristics anatomical structure development reproductive structure development developmental process multicellular organismal process gonad development reproductive system development reproductive process sex differentiation animal organ development developmental process involved in reproduction male gonad development male sex differentiation multicellular organism development development of primary male sexual characteristics development of primary sexual characteristics anatomical structure development reproductive structure development system development cellular response to stimulus positive regulation of cell communication cell surface receptor protein serine/threonine kinase signaling pathway regulation of cellular process positive regulation of signal transduction response to stimulus signaling regulation of transmembrane receptor protein serine/threonine kinase signaling pathway positive regulation of biological process 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 enzyme-linked receptor protein signaling pathway positive regulation of cellular process regulation of biological process regulation of signaling cell surface receptor signaling pathway biological regulation positive regulation of intracellular signal transduction positive regulation of transmembrane receptor protein serine/threonine kinase signaling pathway SMAD protein signal transduction regulation of response to stimulus regulation of cell communication cellular process regulation of SMAD protein signal transduction positive regulation of SMAD protein signal transduction positive regulation of signaling spermatogenesis sexual reproduction multicellular organismal reproductive process male gamete generation gamete generation tissue development mesoderm development cellular catabolic process catabolic process cellular metabolic process autophagy metabolic process process utilizing autophagic mechanism Sertoli cell proliferation cell population proliferation epithelial cell proliferation regulation of developmental process regulation of biomineral tissue development regulation of bone mineralization positive regulation of ossification positive regulation of developmental process positive regulation of biomineral tissue development ossification biomineral tissue development regulation of multicellular organismal process regulation of multicellular organismal development bone mineralization positive regulation of bone mineralization positive regulation of multicellular organismal process regulation of ossification multi-multicellular organism process sperm ejaculation mating behavior behavior reproductive behavior insemination multi-organism reproductive process copulation cellular developmental process homeostatic process cell development regulation of cell differentiation regulation of cell development positive regulation of cell differentiation cell differentiation regulation of immune system process myeloid cell homeostasis erythrocyte homeostasis hemopoiesis regulation of myeloid cell differentiation erythrocyte differentiation regulation of erythrocyte differentiation positive regulation of erythrocyte differentiation multicellular organismal-level homeostasis myeloid cell differentiation immune system process positive regulation of myeloid cell differentiation regulation of hemopoiesis homeostasis of number of cells embryo development ending in birth or egg hatching skeletal system development chordate embryonic development embryonic skeletal system development embryo development phosphorylation phosphate-containing compound metabolic process phosphorus metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II organic substance biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of transcription by RNA polymerase II positive regulation of nucleobase-containing compound metabolic process primary metabolic process regulation of cellular metabolic process positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process positive regulation of DNA-templated transcription cellular biosynthetic process RNA metabolic process positive regulation of cellular metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process positive regulation of biosynthetic process regulation of RNA biosynthetic process regulation of biosynthetic 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 positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process positive regulation of activin receptor signaling pathway activin receptor signaling pathway transforming growth factor beta receptor superfamily signaling pathway regulation of activin receptor signaling pathway cellular response to BMP stimulus cellular response to growth factor stimulus response to endogenous stimulus cellular response to endogenous stimulus response to BMP response to growth factor BMP signaling pathway anatomical structure morphogenesis gastrulation with mouth forming second embryonic morphogenesis gastrulation odontogenesis of dentin-containing tooth odontogenesis animal organ morphogenesis penile erection regulation of nitric oxide biosynthetic process reactive nitrogen species metabolic process nitric oxide metabolic process nitric oxide biosynthetic process regulation of nitric oxide metabolic process determination of bilateral symmetry pattern specification process determination of left/right symmetry left/right pattern formation regionalization specification of symmetry regulation of localization system process regulation of system process localization regulation of biological quality regulation of hormone levels follicle-stimulating hormone secretion establishment of localization regulation of secretion endocrine hormone secretion regulation of endocrine process regulation of hormone secretion gonadotropin secretion transport positive regulation of secretion by cell hormone secretion secretion by cell regulation of secretion by cell positive regulation of hormone secretion positive regulation of secretion signal release positive regulation of follicle-stimulating hormone secretion positive regulation of gonadotropin secretion regulation of follicle-stimulating hormone secretion secretion regulation of transport regulation of gonadotropin secretion cell-cell signaling export from cell endocrine process positive regulation of transport hormone transport regulation of osteoblast differentiation osteoblast differentiation positive regulation of osteoblast differentiation 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 positive regulation of protein modification process regulation of phosphate metabolic process protein metabolic process positive regulation of protein phosphorylation protein modification process organonitrogen compound metabolic process protein phosphorylation positive regulation of phosphorus metabolic process regulation of protein metabolic process macromolecule modification regulation of phosphorus metabolic process regulation of phosphorylation anterior/posterior pattern specification response to decreased oxygen levels response to nutrient levels cellular response to oxygen levels cellular response to decreased oxygen levels cellular response to nutrient levels cellular response to chemical stimulus response to chemical response to oxygen levels cellular response to oxygen-glucose deprivation response to abiotic stimulus response to oxygen-glucose deprivation	intracellular anatomical structure cytoplasm cellular anatomical entity protein-containing complex receptor complex catalytic complex plasma membrane protein complex membrane plasma membrane membrane protein complex transferase complex protein kinase complex transferase complex, transferring phosphorus-containing groups cell periphery intracellular anatomical structure cytoplasm cellular anatomical entity protein-containing complex receptor complex catalytic complex plasma membrane protein complex membrane plasma membrane membrane protein complex transferase complex protein kinase complex transferase complex, transferring phosphorus-containing groups cell periphery serine/threonine protein kinase complex plasma membrane signaling receptor complex activin receptor complex cell surface inhibin-betaglycan-ActRII complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR000472	Activin types I and II receptor domain	Domain
A, B	IPR000719	Protein kinase domain	Domain
A, B	IPR000333	Ser/Thr protein kinase, TGFB receptor	Family
A, B	IPR045860	Snake toxin-like superfamily	Homologous Superfamily
A, B	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A, B	IPR008271	Serine/threonine-protein kinase, active site	Active Site

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.