estrogen-related receptor alpha | |||||||
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Identifiers | |||||||
Symbol | ESRRA | ||||||
Alt. symbols | ESRL1 | ||||||
NCBI gene | 2101 | ||||||
HGNC | 3471 | ||||||
OMIM | 601998 | ||||||
RefSeq | NM_004451 | ||||||
UniProt | P11474 | ||||||
Other data | |||||||
Locus | Chr. 11 q12 | ||||||
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estrogen-related receptor beta | |||||||
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Identifiers | |||||||
Symbol | ESRRB | ||||||
Alt. symbols | ESRL2 | ||||||
NCBI gene | 2103 | ||||||
HGNC | 3473 | ||||||
OMIM | 602167 | ||||||
RefSeq | NM_004452 | ||||||
UniProt | O95718 | ||||||
Other data | |||||||
Locus | Chr. 14 q24.3 | ||||||
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estrogen-related receptor gamma | |||||||
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Identifiers | |||||||
Symbol | ESRRG | ||||||
NCBI gene | 2104 | ||||||
HGNC | 3474 | ||||||
OMIM | 602969 | ||||||
RefSeq | NM_206595 | ||||||
UniProt | P62508 | ||||||
Other data | |||||||
Locus | Chr. 1 q41 | ||||||
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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 enhancers throughout the genome where they exert effects on gene regulation. The ERR family exhibit varying transcriptional activation capabilities and physically interact with the transcriptional co-activators PGC1-alpha and PGC1-beta, [1] [2] [3] [4] [5] via their AF-2 domains and the leucine-rich nuclear receptor interacting motifs (LxxLL) present in the PGC-1 proteins, [6] The ERR family have been demonstrated to control energy homeostasis, [6] [7] oxidative metabolism, [1] [8] and mitochondrial biogenesis, [1] while effecting mammalian physiology in the heart, [9] [10] [11] [12] brown adipose tissue, [13] [14] [15] white adipose tissue, [16] placenta, [17] macrophages, [2] and demonstrated additional roles in diabetes and cancer. [18] The contributions of individual ERRs to physiology continue to be elucidated through the generation of sophisticated tissue-specific gene knockout mouse models.[ citation needed ]
The bile acid receptor (BAR), also known as farnesoid X receptor (FXR) or NR1H4, is a nuclear receptor that is encoded by the NR1H4 gene in humans.
In the field of molecular biology, nuclear receptors are a class of proteins responsible for sensing steroids, thyroid hormones, vitamins, and certain other molecules. These intracellular receptors work with other proteins to regulate the expression of specific genes thereby controlling the development, homeostasis, and metabolism of the organism.
The nuclear receptor coactivator 2 also known as NCoA-2 is a protein that in humans is encoded by the NCOA2 gene. NCoA-2 is also frequently called glucocorticoid receptor-interacting protein 1 (GRIP1), steroid receptor coactivator-2 (SRC-2), or transcriptional mediators/intermediary factor 2 (TIF2).
The small heterodimer partner (SHP) also known as NR0B2 is a protein that in humans is encoded by the NR0B2 gene. SHP is a member of the nuclear receptor family of intracellular transcription factors. SHP is unusual for a nuclear receptor in that it lacks a DNA binding domain. Therefore, it is technically neither a transcription factor nor nuclear receptor but nevertheless it is still classified as such due to relatively high sequence homology with other nuclear receptor family members.
RAR-related orphan receptor alpha (RORα), also known as NR1F1 is a nuclear receptor that in humans is encoded by the RORA gene. RORα participates in the transcriptional regulation of some genes involved in circadian rhythm. In mice, RORα is essential for development of cerebellum through direct regulation of genes expressed in Purkinje cells. It also plays an essential role in the development of type 2 innate lymphoid cells (ILC2) and mutant animals are ILC2 deficient. In addition, although present in normal numbers, the ILC3 and Th17 cells from RORα deficient mice are defective for cytokine production.
Retinoid X receptor alpha (RXR-alpha), also known as NR2B1 is a nuclear receptor that in humans is encoded by the RXRA gene.
Peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) is a protein that in humans is encoded by the PPARGC1A gene. PPARGC1A is also known as human accelerated region 20 (HAR20). It may, therefore, have played a key role in differentiating humans from apes.
Nuclear receptor-interacting protein 1 (NRIP1) also known as receptor-interacting protein 140 (RIP140) is a protein that in humans is encoded by the NRIP1 gene.
Estrogen-related receptor beta (ERR-β), also known as ESRRB or NR3B2, is a nuclear receptor that in humans is encoded by the ESRRB gene.
Estrogen-related receptor gamma (ERR-gamma), also known as NR3B3, is a nuclear receptor that in humans is encoded by the ESRRG gene. It behaves as a constitutive activator of transcription.
COUP-TFII, also known as NR2F2 is a protein that in humans is encoded by the NR2F2 gene. The COUP acronym stands for chicken ovalbumin upstream promoter.
Estrogen-related receptor alpha (ERRα), also known as NR3B1, is a nuclear receptor that in humans is encoded by the ESRRA gene. ERRα was originally cloned by DNA sequence homology to the estrogen receptor alpha, but subsequent ligand binding and reporter-gene transfection experiments demonstrated that estrogens did not regulate ERRα. Currently, ERRα is considered an orphan nuclear receptor.
Mediator of RNA polymerase II transcription subunit 1 also known as DRIP205 or Trap220 is a subunit of the Mediator complex and is a protein that in humans is encoded by the MED1 gene. MED1 functions as a nuclear receptor coactivator.
Mediator of RNA polymerase II transcription subunit 14 is an enzyme that in humans is encoded by the MED14 gene.
Tripartite motif-containing 24 (TRIM24) also known as transcriptional intermediary factor 1α (TIF1α) is a protein that, in humans, is encoded by the TRIM24 gene.
Peroxisome proliferator-activated receptor gamma coactivator 1-beta is a protein that in humans is encoded by the PPARGC1B gene.
Mediator of RNA polymerase II transcription subunit 16 is an enzyme that in humans is encoded by the MED16 gene.
Proline-rich nuclear receptor coactivator 1 is a protein that, in humans, is encoded by the PNRC1 gene.
Nuclear receptor coactivator 5 (NCOA5), also known as coactivator independent of AF-2 function (CIA), is a protein that in humans is encoded by the NCOA5 gene.
Mitochondrial biogenesis is the process by which cells increase mitochondrial numbers. It was first described by John Holloszy in the 1960s, when it was discovered that physical endurance training induced higher mitochondrial content levels, leading to greater glucose uptake by muscles. Mitochondrial biogenesis is activated by numerous different signals during times of cellular stress or in response to environmental stimuli, such as aerobic exercise.