Annotations: 1BTE

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
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)
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)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Snake toxin-like	8038482	3000545	SCOP2B (2022-06-29)
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)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
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)
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)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.10.60.10	Mainly Beta	Ribbon	CD59	CD59	CATH (4.3.0)
B	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)	protein serine/threonine kinase activity molecular transducer activity catalytic activity, acting on a protein kinase activity protein kinase activity signaling receptor activity transferase activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups transmembrane receptor protein serine/threonine kinase activity transforming growth factor beta receptor activity, type II transmembrane receptor protein kinase activity transmembrane signaling receptor activity catalytic activity protein serine/threonine kinase activity molecular transducer activity catalytic activity, acting on a protein kinase activity protein kinase activity signaling receptor activity transferase activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups transmembrane receptor protein serine/threonine kinase activity transforming growth factor beta receptor activity, type II transmembrane receptor protein kinase activity transmembrane signaling receptor activity catalytic activity transforming growth factor beta receptor activity coreceptor activity protein binding binding PDZ domain binding protein domain specific binding protein-containing complex binding activin binding inhibin binding growth factor binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding transforming growth factor beta receptor activity, type III activin receptor activity BMP receptor activity transforming growth factor beta receptor activity, type I activin receptor activity, type I cation binding metal ion binding identical protein binding activin receptor activity, type II	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 cellular response to BMP stimulus cellular response to growth factor stimulus response to endogenous stimulus cellular response to endogenous stimulus response to BMP transforming growth factor beta receptor superfamily signaling pathway response to growth factor BMP signaling pathway anatomical structure morphogenesis gastrulation with mouth forming second embryonic morphogenesis embryo development gastrulation tissue development mesoderm development odontogenesis of dentin-containing tooth odontogenesis animal organ morphogenesis 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 behavior reproductive behavior mating behavior penile erection copulation regulation of nitric oxide biosynthetic process regulation of biosynthetic process reactive nitrogen species metabolic process nitric oxide metabolic process nitric oxide biosynthetic process biosynthetic process regulation of nitric oxide metabolic process metabolic process regulation of metabolic process multi-multicellular organism process sperm ejaculation insemination multi-organism reproductive process determination of bilateral symmetry pattern specification process determination of left/right symmetry left/right pattern formation regionalization specification of symmetry 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 regulation of osteoblast differentiation osteoblast differentiation positive regulation of osteoblast differentiation embryo development ending in birth or egg hatching skeletal system development chordate embryonic development embryonic skeletal system development positive regulation of DNA-templated transcription RNA metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process positive regulation of metabolic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II positive regulation of biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II positive regulation of nucleobase-containing compound metabolic process primary metabolic process regulation of macromolecule metabolic process positive regulation of transcription by RNA polymerase II nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process positive regulation of RNA metabolic process regulation of gene expression positive regulation of RNA biosynthetic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription anterior/posterior pattern specification positive regulation of activin receptor signaling pathway activin receptor signaling pathway regulation of activin receptor signaling pathway	cell surface cellular anatomical structure cell periphery plasma membrane membrane intracellular anatomical structure cytoplasm protein-containing complex receptor complex plasma membrane protein complex inhibin-betaglycan-ActRII complex membrane protein 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	IPR045860	Snake toxin-like superfamily	Homologous Superfamily
A, B	IPR000719	Protein kinase domain	Domain
A, B	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A, B	IPR008271	Serine/threonine-protein kinase, active site	Active Site
A, B	IPR000333	Ser/Thr protein kinase, TGFB receptor	Family

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.