PTGES3

Prostaglandin E synthase 3 (cytosolic)
PDB rendering based on 1ejf.
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 1EJF​, 1LG0​
Identifiers
Symbols	PTGES3 ; P23; TEBP; cPGES
External IDs	OMIM: 607061 MGI: 1929282 HomoloGene: 128197 GeneCards: PTGES3 Gene
EC number	5.3.99.3
Gene ontology Molecular function • telomerase activity • protein binding • prostaglandin-E synthase activity • unfolded protein binding Cellular component • chromosome, telomeric region • nucleus • nucleoplasm • telomerase holoenzyme complex • cytoplasm • cytosol • extracellular exosome Biological process • telomere maintenance • prostaglandin biosynthetic process • RNA-dependent DNA replication • signal transduction • arachidonic acid metabolic process • cyclooxygenase pathway • cellular response to heat • small molecule metabolic process • chaperone cofactor-dependent protein refolding • regulation of cellular response to heat Sources: Amigo / QuickGO
Orthologs
Species	Human	Mouse
Entrez	10728	56351
Ensembl	ENSG00000110958	ENSMUSG00000071072
UniProt	Q15185	Q9R0Q7
RefSeq (mRNA)	NM_001282601	NM_019766
RefSeq (protein)	NP_001269530	NP_062740
Location (UCSC)	Chr 12: 56.66 – 56.69 Mb	Chr 10: 128.06 – 128.08 Mb
PubMed search

Prostaglandin E synthase 3 (cytosolic) is an enzyme that in humans is encoded by the PTGES3 gene.^[1]

The protein encoded by this gene is also known as p23 which functions as a chaperone which is required for proper functioning of the glucocorticoid and other steroid receptors.^[2]

References

1. "Entrez Gene: PTGES3 Prostaglandin E synthase 3 (cytosolic)".
2. Freeman BC, Yamamoto KR (June 2002). "Disassembly of transcriptional regulatory complexes by molecular chaperones". Science 296 (5576): 2232–2235. doi:10.1126/science.1073051. PMID 12077419.

Further reading

• Johnson JL, Beito TG, Krco CJ, Toft DO (1994). "Characterization of a novel 23-kilodalton protein of inactive progesterone receptor complexes". Mol. Cell. Biol. 14 (3): 1956–63. PMC 358554. PMID 8114727.
• Wu T, Wu H, Wang J, Wang J. (2011). "Expression and cellular localization of cyclooxygenases and prostaglandin E synthases in the hemorrhagic brain.". J Neuroinflammation. 8: 22. doi:10.1186/1742-2094-8-22. PMC 3062590. PMID 21385433.
• Bonaldo MF, Lennon G, Soares MB (1997). "Normalization and subtraction: two approaches to facilitate gene discovery". Genome Res. 6 (9): 791–806. doi:10.1101/gr.6.9.791. PMID 8889548.
• Dittmar KD, Pratt WB (1997). "Folding of the glucocorticoid receptor by the reconstituted Hsp90-based chaperone machinery. The initial hsp90.p60.hsp70-dependent step is sufficient for creating the steroid binding conformation". J. Biol. Chem. 272 (20): 13047–13054. doi:10.1074/jbc.272.20.13047. PMID 9148915.
• Dittmar KD, Demady DR, Stancato LF, et al. (1997). "Folding of the glucocorticoid receptor by the heat shock protein (hsp) 90-based chaperone machinery. The role of p23 is to stabilize receptor.hsp90 heterocomplexes formed by hsp90.p60.hsp70". J. Biol. Chem. 272 (34): 21213–21220. doi:10.1074/jbc.272.34.21213. PMID 9261129.
• Zou J, Guo Y, Guettouche T, et al. (1998). "Repression of heat shock transcription factor HSF1 activation by HSP90 (HSP90 complex) that forms a stress-sensitive complex with HSF1". Cell 94 (4): 471–480. doi:10.1016/S0092-8674(00)81588-3. PMID 9727490.
• Yoo JY, Hamburger AW (1999). "Interaction of the p23/p198 protein with ErbB-3". Gene 229 (1–2): 215–221. doi:10.1016/S0378-1119(98)00604-0. PMID 10095121.
• Knoblauch R, Garabedian MJ (1999). "Role for Hsp90-associated cochaperone p23 in estrogen receptor signal transduction". Mol. Cell. Biol. 19 (5): 3748–59. PMC 84199. PMID 10207098.
• Muñoz MJ, Bejarano ER, Daga RR, Jimenez J (2000). "The identification of Wos2, a p23 homologue that interacts with Wee1 and Cdc2 in the mitotic control of fission yeasts". Genetics 153 (4): 1561–72. PMC 1460861. PMID 10581266.
• Freeman BC, Felts SJ, Toft DO, Yamamoto KR (2000). "The p23 molecular chaperones act at a late step in intracellular receptor action to differentially affect ligand efficacies". Genes Dev. 14 (4): 422–34. PMC 316379. PMID 10691735.
• Weaver AJ, Sullivan WP, Felts SJ, et al. (2000). "Crystal structure and activity of human p23, a heat shock protein 90 co-chaperone". J. Biol. Chem. 275 (30): 23045–23052. doi:10.1074/jbc.M003410200. PMID 10811660.
• Tanioka T, Nakatani Y, Semmyo N, et al. (2000). "Molecular identification of cytosolic prostaglandin E2 synthase that is functionally coupled with cyclooxygenase-1 in immediate prostaglandin E2 biosynthesis". J. Biol. Chem. 275 (42): 32775–32782. doi:10.1074/jbc.M003504200. PMID 10922363.
• Kazlauskas A, Poellinger L, Pongratz I (2001). "The immunophilin-like protein XAP2 regulates ubiquitination and subcellular localization of the dioxin receptor". J. Biol. Chem. 275 (52): 41317–41324. doi:10.1074/jbc.M007765200. PMID 11013261.
• Futatsumori M, Kasai K, Takatsu H, et al. (2001). "Identification and characterization of novel isoforms of COP I subunits". J. Biochem. 128 (5): 793–801. doi:10.1093/oxfordjournals.jbchem.a022817. PMID 11056392.
• Kazlauskas A, Sundström S, Poellinger L, Pongratz I (2001). "The hsp90 chaperone complex regulates intracellular localization of the dioxin receptor". Mol. Cell. Biol. 21 (7): 2594–2607. doi:10.1128/MCB.21.7.2594-2607.2001. PMC 86890. PMID 11259606.
• Forsythe HL, Jarvis JL, Turner JW, et al. (2001). "Stable association of hsp90 and p23, but Not hsp70, with active human telomerase". J. Biol. Chem. 276 (19): 15571–15574. doi:10.1074/jbc.C100055200. PMID 11274138.
• Donzé O, Abbas-Terki T, Picard D (2001). "The Hsp90 chaperone complex is both a facilitator and a repressor of the dsRNA-dependent kinase PKR". EMBO J. 20 (14): 3771–3780. doi:10.1093/emboj/20.14.3771. PMC 125551. PMID 11447118.
• Elder RT, Yu M, Chen M, et al. (2001). "HIV-1 Vpr induces cell cycle G2 arrest in fission yeast (Schizosaccharomyces pombe) through a pathway involving regulatory and catalytic subunits of PP2A and acting on both Wee1 and Cdc25". Virology 287 (2): 359–370. doi:10.1006/viro.2001.1007. PMID 11531413.
• Hernández MP, Chadli A, Toft DO (2002). "HSP40 binding is the first step in the HSP90 chaperoning pathway for the progesterone receptor". J. Biol. Chem. 277 (14): 11873–11881. doi:10.1074/jbc.M111445200. PMID 11809754.
• McLaughlin SH, Smith HW, Jackson SE (2002). "Stimulation of the weak ATPase activity of human hsp90 by a client protein". J. Mol. Biol. 315 (4): 787–798. doi:10.1006/jmbi.2001.5245. PMID 11812147.
• Cox MB, Miller CA (2002). "The p23 co-chaperone facilitates dioxin receptor signaling in a yeast model system". Toxicol. Lett. 129 (1–2): 13–21. doi:10.1016/S0378-4274(01)00465-9. PMID 11879970.