Estrogen-related receptor
      
The ERRs are orphan nuclear receptors, meaning the identity of their endogenous ligand has yet to be unambiguously determined. They are named because of sequence homology with estrogen receptors, but do not appear to bind estrogens or other tested steroid hormones. 
There are three human estrogen related receptors:
ERRs bind to estrogen response elements and modulate transcription but are not activated by estrogens. 
They also have their own response elements: ERREs. ERRs have been associated with energy homeostasis, diabetes and cancer.[1]
References
External links
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 |  |  | | (2.1) Nuclear receptor (Cys4) | | subfamily 1 |  | 
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 |  |  | subfamily 2 |  | 
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 |  |  | subfamily 3 |  | 
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 |  |  | subfamily 4 |  | 
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 |  |  | subfamily 5 |  | 
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 |  |  | subfamily 6 |  | 
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 |  |  | subfamily 0 |  | 
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 |  |  | (2.2) Other Cys4 |  | 
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 |  |  | (2.3) Cys2His2 |  | 
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 |  |  | (2.4) Cys6 |  | 
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 |  |  | (2.5) Alternating composition |  | 
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 |  |  | (2.6) WRKY |  | 
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 |  |  |  |  |  |  |  | | (4) β-Scaffold factors with minor groove contacts | 
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 |  |  |  | |  (0) Other transcription factors | 
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 |  |  |  | see also transcription factor/coregulator deficiencies | 
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 |  |  | CAR |  | 
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 |  |  | ERR |  | 
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 |  |  | FXR |  | 
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 |  |  | LXR |  | 
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 |  |  | PPAR | |  |  | 
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 |  |  |  | | Agonists |  | 
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 |  |  | SPPARMs |  | 
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 |  |  | Antagonists | 
 FH-535 GW-9662 SR-202 T-0070907
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 |  |  | Unknown |  | 
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 |  |  | Unselective |  | 
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 |  |  | PXR |  | 
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 |  |  | RAR | | Agonists |  | 
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 |  |  | Antagonists | 
 BMS-195614 BMS-493 CD-2665 ER-50891 LE-135 MM-11253
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 |  |  | RXR | | Agonists |  | 
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 |  |  | Antagonists | 
 HX-531 HX-630 LG-100754 PA-452 UVI-3003
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 |  |  | SHR | |  | See here instead. | 
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 |  |  |  | See here instead. | 
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 |  |  |  | See here instead. | 
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 |  |  |  | See here instead. | 
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 |  |  |  | See here instead. | 
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 |  |  | TR |  | 
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