Estrogen-related receptor gamma (ERR-gamma), also known as NR3B3 (nuclear receptor subfamily 3, group B, member 3), is a nuclear receptor that in humans is encoded by the ESRRG (EStrogen Related Receptor Gamma) gene.[5][6][7] It behaves as a constitutive activator of transcription.[8]

Quick Facts ESRRG, Available structures ...
ESRRG
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesESRRG, ERR3, ERRgamma, NR3B3, estrogen related receptor gamma, ERRg, ERR-gamma
External IDsOMIM: 602969; MGI: 1347056; HomoloGene: 55581; GeneCards: ESRRG; OMA:ESRRG - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001243792
NM_011935
NM_001357534
NM_001357535
NM_001357536

RefSeq (protein)

NP_001230721
NP_036065
NP_001344463
NP_001344464
NP_001344465

Location (UCSC)Chr 1: 216.5 – 217.14 MbChr 1: 187.34 – 187.95 Mb
PubMed search[3][4]
Wikidata
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This protein is a member of nuclear hormone receptor family of steroid hormone receptors. No physiological activating ligand is known for this orphan receptor, but 4-hydroxytamoxifen and diethylstilbestrol act as inverse agonists and deactivate ESRRG.[9] It also seems to be the target of bisphenol A (see below).

Bisphenol A binding

There is evidence that bisphenol A functions as a xenoestrogen by binding strongly to ERR-γ.[8] BPA as well as its nitrated and chlorinated metabolites seems to binds strongly to ERR-γ (dissociation constant = 5.5 nM), but not to the estrogen receptor (ER).,[8][10] BPA binding to ERR-γ preserves its basal constitutive activity.[8] It can also protect it from deactivation from the selective estrogen receptor modulator 4-hydroxytamoxifen.[8]

Different expression of ERR-γ in different parts of the body may account for variations in bisphenol A effects. For instance, ERR-γ has been found in high concentration in the placenta, explaining reports of high bisphenol A accumulation there.[11]

References

Further reading

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