Annotations: 7YRU

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth L]	Iso_dh	e7yruL1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Iso_dh	ECOD (v294.1)
B [auth H]	Iso_dh	e7yruH1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Iso_dh	ECOD (v294.1)
A	Iso_dh	e7yruA1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Iso_dh	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L]	Light Chain	IGKV4	Kappa	activin receptor type-1	SAbDab (2026-04-10)
B [auth H]	Heavy Chain	IGHV5	-	activin receptor type-1	SAbDab (2026-04-10)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	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 ty ...	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
C [auth L]	antibody light chain	-	-	-
B [auth H]	antibody heavy chain	-	-	-
A	Activin receptor type-1	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 anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding 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 anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding cell adhesion molecule binding cadherin binding protein binding catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups peptide hormone binding hormone binding protein tyrosine kinase binding kinase binding enzyme binding protein kinase binding cation binding metal ion binding transforming growth factor beta binding growth factor binding cytokine binding identical protein binding protein homodimerization activity protein dimerization activity SMAD binding protein serine/threonine kinase activity BMP receptor activity molecular transducer activity signaling receptor activity transmembrane receptor protein serine/threonine kinase activity transmembrane receptor protein kinase activity transmembrane signaling receptor activity transforming growth factor beta receptor activity, type I transforming growth factor beta receptor activity activin receptor activity activin receptor activity, type I	cellular response to stimulus regulation of signaling regulation of biological process regulation of cellular process response to stimulus negative regulation of signaling signaling negative regulation of response to stimulus biological regulation negative regulation of biological process regulation of signal transduction negative regulation of signal transduction negative regulation of cell communication cell communication regulation of response to stimulus cellular response to stimulus regulation of signaling regulation of biological process regulation of cellular process response to stimulus negative regulation of signaling signaling negative regulation of response to stimulus biological regulation negative regulation of biological process regulation of signal transduction negative regulation of signal transduction negative regulation of cell communication cell communication regulation of response to stimulus negative regulation of cellular process regulation of cell communication cellular process signal transduction positive regulation of cell communication cell surface receptor protein serine/threonine kinase signaling pathway positive regulation of signal transduction regulation of transmembrane receptor protein serine/threonine kinase signaling pathway positive regulation of biological process intracellular signal transduction positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette enzyme-linked receptor protein signaling pathway positive regulation of cellular process cell surface receptor signaling pathway positive regulation of intracellular signal transduction positive regulation of transmembrane receptor protein serine/threonine kinase signaling pathway SMAD protein signal transduction regulation of SMAD protein signal transduction positive regulation of SMAD protein signal transduction positive regulation of signaling developmental process heart development multicellular organism development multicellular organismal process anatomical structure development animal organ development circulatory system development system development cardiac chamber morphogenesis heart morphogenesis ventricular septum development anatomical structure morphogenesis cardiac septum development cardiac septum morphogenesis ventricular septum morphogenesis cardiac chamber development animal organ morphogenesis cardiac ventricle development activin receptor signaling pathway negative regulation of activin receptor signaling pathway transforming growth factor beta receptor superfamily signaling pathway regulation of activin receptor signaling pathway negative regulation of transmembrane receptor protein serine/threonine kinase signaling pathway dorsal/ventral pattern formation pattern specification process regionalization 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 tissue development positive regulation of bone mineralization positive regulation of multicellular organismal process regulation of ossification mesenchyme morphogenesis endocardial cushion morphogenesis mesenchyme development endocardial cushion formation tissue morphogenesis endocardial cushion development anatomical structure formation involved in morphogenesis embryo development ending in birth or egg hatching pharyngeal system development chordate embryonic development embryo development in utero embryonic development branching morphogenesis of an epithelial tube angiogenesis tube morphogenesis epithelial tube morphogenesis blood vessel development epithelium development blood vessel morphogenesis tube development morphogenesis of an epithelium vasculature development branching involved in blood vessel morphogenesis morphogenesis of a branching structure morphogenesis of a branching epithelium cellular developmental process cardiac muscle cell fate commitment muscle cell fate commitment muscle cell differentiation striated muscle tissue development muscle structure development cell differentiation cardiac cell fate commitment muscle tissue development cardiac muscle tissue development cardiac muscle cell differentiation cardiocyte differentiation striated muscle cell differentiation cell fate commitment embryonic heart tube development embryonic heart tube morphogenesis embryonic organ development embryonic organ morphogenesis embryonic morphogenesis positive regulation of determination of dorsal identity regulation of determination of dorsal identity determination of bilateral symmetry determination of dorsal/ventral asymmetry determination of dorsal identity specification of symmetry regulation of programmed cell death extrinsic apoptotic signaling pathway negative regulation of extrinsic apoptotic signaling pathway negative regulation of apoptotic signaling pathway negative regulation of programmed cell death regulation of apoptotic process cell death regulation of extrinsic apoptotic signaling pathway apoptotic signaling pathway negative regulation of apoptotic process apoptotic process programmed cell death regulation of apoptotic signaling pathway atrioventricular valve development heart valve development mitral valve morphogenesis heart valve morphogenesis mitral valve development atrioventricular valve morphogenesis 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 biosynthetic process regulation of transcription by RNA polymerase II 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 biosynthetic process positive regulation of RNA biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process cellular response to growth factor stimulus cellular response to transforming growth factor beta stimulus response to endogenous stimulus cellular response to endogenous stimulus response to transforming growth factor beta transforming growth factor beta receptor signaling pathway response to growth factor formation of primary germ layer mesoderm morphogenesis gastrulation mesoderm formation mesoderm development endocardial cushion fusion cell adhesion involved in heart morphogenesis cell adhesion cell-cell adhesion osteoblast differentiation endothelial cell fate commitment endocardial cell fate commitment endothelium development endocardial cushion cell fate commitment cardiac endothelial cell differentiation epithelial cell fate commitment endocardium development epithelial cell differentiation endothelial cell differentiation endocardial cushion cell differentiation endocardial cell differentiation cellular response to BMP stimulus response to BMP BMP signaling pathway gastrulation with mouth forming second sexual reproduction reproductive process multicellular organismal reproductive process cell development cellular process involved in reproduction in multicellular organism developmental process involved in reproduction gamete generation germ cell development defense response response to stress inflammatory response acute inflammatory response stem cell development neural crest cell differentiation neural crest cell development mesenchymal cell migration stem cell differentiation ameboidal-type cell migration cell migration mesenchymal cell differentiation cell motility neural crest cell migration regulation of epithelial to mesenchymal transition positive regulation of cardiac epithelial to mesenchymal transition positive regulation of epithelial to mesenchymal transition regulation of cell differentiation positive regulation of cell differentiation cardiac epithelial to mesenchymal transition regulation of cardiac epithelial to mesenchymal transition epithelial to mesenchymal transition determination of left/right symmetry left/right pattern formation regulation of cell cycle phase transition negative regulation of cell cycle cell cycle phase transition regulation of cell cycle G1/S phase transition cell cycle G1/S phase transition mitotic cell cycle negative regulation of mitotic cell cycle regulation of mitotic cell cycle negative regulation of cell cycle phase transition cell cycle regulation of cell cycle cell cycle process negative regulation of G1/S transition of mitotic cell cycle negative regulation of mitotic cell cycle phase transition regulation of cell cycle process negative regulation of cell cycle G1/S phase transition negative regulation of cell cycle process regulation of mitotic cell cycle phase transition mitotic cell cycle process regulation of G1/S transition of mitotic cell cycle G1/S transition of mitotic cell cycle mitotic cell cycle phase transition regulation of osteoblast differentiation positive regulation of osteoblast differentiation positive regulation of locomotion regulation of cell motility positive regulation of cell migration regulation of locomotion positive regulation of cell motility regulation of cell migration locomotion smooth muscle cell differentiation cardiac atrium morphogenesis septum primum development atrial septum primum morphogenesis cardiac atrium development atrial septum morphogenesis atrial septum development	cellular anatomical structure apical part of cell cell periphery protein-containing complex plasma membrane protein complex membrane plasma membrane plasma membrane signaling receptor complex membrane protein complex signaling receptor complex BMP receptor complex catalytic complex transferase complex protein kinase complex cellular anatomical structure apical part of cell cell periphery protein-containing complex plasma membrane protein complex membrane plasma membrane plasma membrane signaling receptor complex membrane protein complex signaling receptor complex BMP receptor complex catalytic complex transferase complex protein kinase complex transferase complex, transferring phosphorus-containing groups serine/threonine protein kinase complex activin receptor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR000472	Activin types I and II receptor domain	Domain
A	IPR000719	Protein kinase domain	Domain
A	IPR003605	GS domain	Domain
A	IPR000333	Ser/Thr protein kinase, TGFB receptor	Family
A	IPR017441	Protein kinase, ATP binding site	Binding Site
A	IPR045860	Snake toxin-like superfamily	Homologous Superfamily
A	IPR001245	Serine-threonine/tyrosine-protein kinase, catalytic domain	Domain
A	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A	IPR008271	Serine/threonine-protein kinase, active site	Active Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q04771	fibrodysplasia ossificans progressiva malignant glioma juvenile pilocytic astrocytoma acute lung injury protoplasmic astrocytoma fibrillary astrocytoma mixed glioma myositis ossificans pilocytic astrocytoma anaplastic astrocytoma childhood cerebral astrocytoma astrocytic tumor subependymal giant cell astrocytoma breast carcinoma gemistocytic astrocytoma fibrodysplasia ossificans progressiva malignant glioma juvenile pilocytic astrocytoma acute lung injury protoplasmic astrocytoma fibrillary astrocytoma mixed glioma myositis ossificans pilocytic astrocytoma anaplastic astrocytoma childhood cerebral astrocytoma astrocytic tumor subependymal giant cell astrocytoma breast carcinoma gemistocytic astrocytoma Mammary Neoplasms melanoma myopathy ovarian cancer astrocytoma (excluding glioblastoma) ulcerative colitis cerebral astrocytoma diffuse astrocytoma glioma intellectual disability psoriasis breast cancer Ehlers-Danlos syndrome medulloblastoma osteosarcoma primary myelofibrosis facioscapulohumeral muscular dystrophy IgA glomerulonephritis

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.