Annotations: 2KD3

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Sclerostin-like	8047247	4005526	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Cystine-knot cytokines	8106454	3000846	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	Sclerostin	e2kd3A1	A: few secondary structure elements	X: Cystine-knot cytokines (From Topology)	H: Cystine-knot cytokines (From Topology)	T: Cystine-knot cytokines	F: Sclerostin	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.10.90.10	Mainly Beta	Ribbon	Cystine Knot Cytokines, subunit B	Cystine-knot cytokines	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF05463	Sclerostin (SOST) (Sclerostin)	Sclerostin (SOST)	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Sclerostin	binding carbohydrate binding transcription factor binding protein binding DNA-binding transcription factor binding molecular function inhibitor activity molecular function regulator activity BMP binding cytokine binding heparin binding glycosaminoglycan binding carbohydrate derivative binding sulfur compound binding	cellular response to stimulus regulation of cellular process response to stimulus negative regulation of signaling signaling negative regulation of biological process regulation of signal transduction negative regulation of cell communication cell communication negative regulation of Wnt signaling pathway negative regulation of cellular process signal transduction Wnt signaling pathway regulation of signaling cellular response to stimulus regulation of cellular process response to stimulus negative regulation of signaling signaling negative regulation of biological process regulation of signal transduction negative regulation of cell communication cell communication negative regulation of Wnt signaling pathway negative regulation of cellular process signal transduction Wnt signaling pathway regulation of signaling regulation of biological process cell surface receptor signaling pathway regulation of Wnt signaling pathway negative regulation of response to stimulus biological regulation negative regulation of signal transduction regulation of response to stimulus regulation of cell communication cellular process response to mechanical stimulus response to abiotic stimulus response to external stimulus cellular response to BMP stimulus cell surface receptor protein serine/threonine kinase signaling pathway 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 enzyme-linked receptor protein signaling pathway canonical Wnt signaling pathway multicellular organismal process ossification cellular response to parathyroid hormone stimulus response to organic substance cellular response to chemical stimulus response to parathyroid hormone response to hormone response to chemical cellular response to organic substance cellular response to hormone stimulus 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 organic substance biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of nucleobase-containing compound metabolic process cellular metabolic process primary metabolic process regulation of cellular metabolic process positive regulation of RNA metabolic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic 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 positive regulation of biological 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 positive regulation of cellular 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 localization regulation of canonical Wnt signaling pathway negative regulation of canonical Wnt signaling pathway regulation of cellular component organization negative regulation of cellular component organization protein-containing complex organization regulation of cellular component biogenesis negative regulation of protein-containing complex assembly cellular component organization cellular component biogenesis regulation of protein-containing complex assembly cellular component assembly protein-containing complex assembly cellular component organization or biogenesis regulation of transmembrane receptor protein serine/threonine kinase signaling pathway negative regulation of cellular response to growth factor stimulus negative regulation of BMP signaling pathway regulation of BMP signaling pathway regulation of cellular response to growth factor stimulus negative regulation of transmembrane receptor protein serine/threonine kinase signaling pathway regulation of multicellular organismal process negative regulation of multicellular organismal process regulation of ossification negative regulation of ossification	membrane-bounded organelle intracellular organelle intracellular anatomical structure Golgi apparatus organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle endomembrane system extracellular region extracellular space protein-containing complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR029034	Cystine-knot cytokine	Homologous Superfamily
A	IPR008835	Sclerostin/Sclerostin domain-containing protein 1	Family

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.