Retinoid X receptor gamma

Last updated
RXRG
Protein RXRG PDB 1by4.png
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases RXRG , NR2B3, RXRC, Retinoid X receptor gamma, RXR-gamma, RXRgamma
External IDs OMIM: 180247 MGI: 98216 HomoloGene: 21373 GeneCards: RXRG
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001256570
NM_001256571
NM_006917

NM_001159731
NM_009107

RefSeq (protein)

NP_001243499
NP_001243500
NP_008848

NP_001153203
NP_033133

Location (UCSC) Chr 1: 165.4 – 165.45 Mb Chr 1: 167.43 – 167.47 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Retinoid X receptor gamma (RXR-gamma), also known as NR2B3 (nuclear receptor subfamily 2, group B, member 3) is a nuclear receptor that in humans is encoded by the RXRG gene. [5] [6]

Contents

Function

This gene encodes a member of the retinoid X receptor (RXR) family of nuclear receptors which are involved in mediating the antiproliferative effects of retinoic acid (RA). This receptor forms heterodimers with the retinoic acid, thyroid hormone, and vitamin D receptors, increasing both DNA binding and transcriptional function on their respective response elements. This gene is expressed at significantly lower levels in non-small cell lung cancer cells. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [6]

See also

Interactions

Retinoid X receptor gamma has been shown to interact with ITGB3BP. [7]

Related Research Articles

The thyroid hormone receptor (TR) is a type of nuclear receptor that is activated by binding thyroid hormone. TRs act as transcription factors, ultimately affecting the regulation of gene transcription and translation. These receptors also have non-genomic effects that lead to second messenger activation, and corresponding cellular response.

The retinoic acid receptor (RAR) is a type of nuclear receptor which can also act as a ligand-activated transcription factor that is activated by both all-trans retinoic acid and 9-cis retinoic acid, retinoid active derivatives of Vitamin A. They are typically found within the nucleus. There are three retinoic acid receptors (RAR), RAR-alpha, RAR-beta, and RAR-gamma, encoded by the RARA, RARB, RARG genes, respectively. Within each RAR subtype there are various isoforms differing in their N-terminal region A. Multiple splice variants have been identified in human RARs: four for RARA, five for RARB, and two for RARG. As with other type II nuclear receptors, RAR heterodimerizes with RXR and in the absence of ligand, the RAR/RXR dimer binds to hormone response elements known as retinoic acid response elements (RAREs) complexed with corepressor protein. Binding of agonist ligands to RAR results in dissociation of corepressor and recruitment of coactivator protein that, in turn, promotes transcription of the downstream target gene into mRNA and eventually protein. In addition, the expression of RAR genes is under epigenetic regulation by promoter methylation. Both the length and magnitude of the retinoid response is dependent of the degradation of RARs and RXRs through the ubiquitin-proteasome. This degradation can lead to elongation of the DNA transcription through disruption of the initiation complex or to end the response to facilitate further transcriptional programs. Due to RAR/RXR heterodimers acting as subtrates to the non steroid hormone ligand retinoid they are extensively involved in cell differentiation, proliferation, and apoptosis.

The retinoid X receptor (RXR) is a type of nuclear receptor that is activated by 9-cis retinoic acid, which is discussed controversially to be of endogenous relevance, and 9-cis-13,14-dihydroretinoic acid, which is likely to be the major endogenous mammalian RXR-selective agonist.

<span class="mw-page-title-main">Liver X receptor</span> Nuclear receptor

The liver X receptor (LXR) is a member of the nuclear receptor family of transcription factors and is closely related to nuclear receptors such as the PPARs, FXR and RXR. Liver X receptors (LXRs) are important regulators of cholesterol, fatty acid, and glucose homeostasis. LXRs were earlier classified as orphan nuclear receptors, however, upon discovery of endogenous oxysterols as ligands they were subsequently deorphanized.

<span class="mw-page-title-main">Nuclear receptor co-repressor 1</span> Protein-coding gene in the species Homo sapiens

The nuclear receptor co-repressor 1 also known as thyroid-hormone- and retinoic-acid-receptor-associated co-repressor 1 (TRAC-1) is a protein that in humans is encoded by the NCOR1 gene.

<span class="mw-page-title-main">Nuclear receptor co-repressor 2</span> Protein-coding gene in the species Homo sapiens

The nuclear receptor co-repressor 2 (NCOR2) is a transcriptional coregulatory protein that contains several nuclear receptor-interacting domains. In addition, NCOR2 appears to recruit histone deacetylases to DNA promoter regions. Hence NCOR2 assists nuclear receptors in the down regulation of target gene expression. NCOR2 is also referred to as a silencing mediator for retinoid or thyroid-hormone receptors (SMRT) or T3 receptor-associating cofactor 1 (TRAC-1).

<span class="mw-page-title-main">Small heterodimer partner</span> Protein-coding gene in the species Homo sapiens

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.

<span class="mw-page-title-main">Peroxisome proliferator-activated receptor gamma</span> Nuclear receptor protein found in humans

Peroxisome proliferator-activated receptor gamma, also known as the glitazone reverse insulin resistance receptor, or NR1C3 is a type II nuclear receptor functioning as a transcription factor that in humans is encoded by the PPARG gene.

<span class="mw-page-title-main">Retinoid X receptor alpha</span> Protein-coding gene in the species Homo sapiens

Retinoid X receptor alpha (RXR-alpha), also known as NR2B1 is a nuclear receptor that in humans is encoded by the RXRA gene.

<span class="mw-page-title-main">Retinoic acid receptor alpha</span> Protein-coding gene in the species Homo sapiens

Retinoic acid receptor alpha (RAR-α), also known as NR1B1 is a nuclear receptor that in humans is encoded by the RARA gene.

<span class="mw-page-title-main">Retinoid X receptor beta</span> Protein-coding gene in the species Homo sapiens

Retinoid X receptor beta (RXR-beta), also known as NR2B2 is a nuclear receptor that in humans is encoded by the RXRB gene.

<span class="mw-page-title-main">Thyroid hormone receptor alpha</span> Protein-coding gene in the species Homo sapiens

Thyroid hormone receptor alpha (TR-alpha) also known as nuclear receptor subfamily 1, group A, member 1 (NR1A1), is a nuclear receptor protein that in humans is encoded by the THRA gene.

<span class="mw-page-title-main">Retinoic acid receptor beta</span> Protein-coding gene in the species Homo sapiens

Retinoic acid receptor beta (RAR-beta), also known as NR1B2 is a nuclear receptor that in humans is encoded by the RARB gene.

<span class="mw-page-title-main">Retinoic acid receptor gamma</span> Protein-coding gene in the species Homo sapiens

Retinoic acid receptor gamma (RAR-γ), also known as NR1B3 is a nuclear receptor encoded by the RARG gene. Adapalene selectively targets retinoic acid receptor beta and retinoic acid receptor gamma and its agonism of the gamma subtype is largely responsible for adapalene's observed effects.

<span class="mw-page-title-main">Liver X receptor beta</span> Protein-coding gene in the species Homo sapiens

Liver X receptor beta (LXR-β) is a member of the nuclear receptor family of transcription factors. LXR-β is encoded by the NR1H2 gene.

<span class="mw-page-title-main">NCOA6</span> Protein-coding gene in the species Homo sapiens

Nuclear receptor coactivator 6 is a protein that in humans is encoded by the NCOA6 gene.

<span class="mw-page-title-main">BRD8</span> Protein-coding gene in the species Homo sapiens

Bromodomain-containing protein 8 is a protein that in humans is encoded by the BRD8 gene.

<span class="mw-page-title-main">RARRES3</span> Protein-coding gene in the species Homo sapiens

Retinoic acid receptor responder protein 3 is a protein that in humans is encoded by the RARRES3 gene.

<span class="mw-page-title-main">CRABP1</span> Protein-coding gene in the species Homo sapiens

Cellular retinoic acid-binding protein 1 is a protein that in humans is encoded by the CRABP1 gene.

<span class="mw-page-title-main">RARRES1</span> Protein-coding gene in the species Homo sapiens

Retinoic acid receptor responder protein 1 is a protein that in humans is encoded by the RARRES1 gene.

References

  1. 1 2 3 GRCh38: Ensembl release 89: ENSG00000143171 - Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000015843 - Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. Almasan A, Mangelsdorf DJ, Ong ES, Wahl GM, Evans RM (April 1994). "Chromosomal localization of the human retinoid X receptors". Genomics. 20 (3): 397–403. doi:10.1006/geno.1994.1193. PMID   8034312.
  6. 1 2 "Entrez Gene: RXRG retinoid X receptor, gamma".
  7. Li D, Wang F, Samuels HH (Dec 2001). "Domain structure of the NRIF3 family of coregulators suggests potential dual roles in transcriptional regulation". Mol. Cell. Biol. 21 (24): 8371–84. doi:10.1128/MCB.21.24.8371-8384.2001. PMC   100002 . PMID   11713274.

Further reading

This article incorporates text from the United States National Library of Medicine, which is in the public domain.