Annotations: 1EJF

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1ejfa_	All beta proteins	HSP20-like chaperones	HSP20-like chaperones	Co-chaperone p23-like	Co-chaperone p23	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1ejfb_	All beta proteins	HSP20-like chaperones	HSP20-like chaperones	Co-chaperone p23-like	Co-chaperone p23	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)
A	SCOP2 Family	Co-chaperone p23-like	8028746	4002443	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Hsp20 chaperone-like	8041125	3001242	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Hsp20 chaperone-like	8041125	3001242	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)
A	CS	e1ejfA1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: CS	ECOD (1.6)
B	CS	e1ejfB1	A: beta sandwiches	X: HSP20-like	H: HSP20-like chaperones (From Topology)	T: HSP20-like chaperones	F: CS	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.790	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)
B	2.60.40.790	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF04969	CS domain (CS)	CS domain	The CS and CHORD (Pfam:PF04968) are fused into a single polypeptide chain in metazoans but are found in separate proteins in plants; this is thought to be indicative of an interaction between CS and CHORD [1]. It has been suggested that the CS domain ...	The CS and CHORD (Pfam:PF04968) are fused into a single polypeptide chain in metazoans but are found in separate proteins in plants; this is thought to be indicative of an interaction between CS and CHORD [1]. It has been suggested that the CS domain is a binding module for HSP90, implying that CS domain-containing proteins are involved in recruiting heat shock proteins to multiprotein assemblies [2]. Two CS domains are found at the N-terminus of Ubiquitin carboxyl-terminal hydrolase 19 (USP19) (Swiss:O94966), these domains may play a role in the interaction of USP19 with cellular inhibitor of apoptosis 2 [3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Prostaglandin E synthase 3	Hsp90 protein binding protein binding binding heat shock protein binding isomerase activity intramolecular oxidoreductase activity prostaglandin-E synthase activity catalytic activity protein-folding chaperone binding unfolded protein binding telomerase activity RNA-directed DNA polymerase activity catalytic activity, acting on DNA DNA polymerase activity Hsp90 protein binding protein binding binding heat shock protein binding isomerase activity intramolecular oxidoreductase activity prostaglandin-E synthase activity catalytic activity protein-folding chaperone binding unfolded protein binding telomerase activity RNA-directed DNA polymerase activity catalytic activity, acting on DNA DNA polymerase activity catalytic activity, acting on a nucleic acid transferase activity nucleotidyltransferase activity transferase activity, transferring phosphorus-containing groups DNA polymerase binding enzyme binding	regulation of protein stability biological regulation regulation of biological quality protein stabilization telomere maintenance via telomerase telomere organization chromosome organization primary metabolic process DNA metabolic process nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process RNA-templated DNA biosynthetic process nucleobase-containing compound metabolic process regulation of protein stability biological regulation regulation of biological quality protein stabilization telomere maintenance via telomerase telomere organization chromosome organization primary metabolic process DNA metabolic process nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process RNA-templated DNA biosynthetic process nucleobase-containing compound metabolic process telomere maintenance via telomere lengthening telomere maintenance cellular component organization nucleic acid biosynthetic process organelle organization biosynthetic process metabolic process cellular process macromolecule metabolic process cellular component organization or biogenesis DNA biosynthetic process cellular component biogenesis cellular component assembly chaperone-mediated protein complex assembly protein-containing complex organization protein-containing complex assembly ribonucleoprotein complex biogenesis telomerase holoenzyme complex assembly protein-RNA complex assembly protein-RNA complex organization protein folding protein metabolic process gene expression protein maturation icosanoid metabolic process prostaglandin metabolic process unsaturated fatty acid metabolic process oxoacid metabolic process lipid biosynthetic process organic acid biosynthetic process organic acid metabolic process carboxylic acid biosynthetic process prostanoid metabolic process icosanoid biosynthetic process small molecule metabolic process prostaglandin biosynthetic process prostanoid biosynthetic process fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process carboxylic acid metabolic process fatty acid biosynthetic process unsaturated fatty acid biosynthetic process monocarboxylic acid metabolic process lipid metabolic process cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling signal transduction cell communication positive regulation of organelle organization regulation of DNA biosynthetic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of telomere maintenance via telomere lengthening positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of telomere maintenance regulation of chromosome organization regulation of telomere maintenance via telomere lengthening regulation of organelle organization positive regulation of chromosome organization positive regulation of DNA metabolic process positive regulation of telomere maintenance via telomerase regulation of macromolecule biosynthetic process regulation of metabolic process regulation of DNA metabolic process regulation of telomere maintenance regulation of cellular component organization positive regulation of cellular component organization positive regulation of biological process positive regulation of biosynthetic process positive regulation of cellular process regulation of biosynthetic process positive regulation of DNA biosynthetic process regulation of macromolecule metabolic process regulation of telomere maintenance via telomerase	membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle telomerase holoenzyme complex cellular anatomical structure organelle ribonucleoprotein complex cytoplasm cytosol membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle telomerase holoenzyme complex cellular anatomical structure organelle ribonucleoprotein complex cytoplasm cytosol membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen protein folding chaperone complex intracellular protein-containing complex membraneless organelle intracellular membraneless organelle chromosome chromosome, telomeric region chromosomal region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR008978	HSP20-like chaperone	Homologous Superfamily
A, B	IPR045250	Co-chaperone protein p23-like	Family
A, B	IPR007052	CS domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: Q15185	atrial fibrillation ovarian cancer lung cancer plasma cell myeloma lymphoplasmacytic lymphoma toxic encephalopathy

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.