Retinoid receptor
Retinoid receptors are nuclear receptors (a class of proteins) that bind to retinoids. When bound to a retinoid, they act as transcription factors, altering the expression of genes with corresponding response elements.
Subtypes include:
- Retinoic acid receptors (RARs)
- Retinoid x receptors (RXRs)
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Transcription factors and intracellular receptors |
| (1) Basic domains |
| (1.1) Basic leucine zipper (bZIP) |
Activating transcription factor (1, 2, 3, 4, 5, 6) • AP-1 (c-Fos, FOSB, FOSL1, FOSL2, c-Jun, JUNB, JUND) • BACH (1, 2) • C/EBP (α, β, γ, δ, ε, ζ) • CREB (1, 3) • GABPA • MAF (B, F, G, K) • NRL • NRF1 • XBP1 |
| (1.2) Basic helix-loop-helix (bHLH) |
ATOH1 • AhR • AHRR • ARNT • ASCL1 • BMAL (ARNTL, ARNTL2) • CLOCK • HIF (1A, 3A) • Myogenic regulatory factors (MyoD, Myogenin, MYF5, MYF6) • NEUROD1 • Twist • USF1 |
| (1.3) bHLH-ZIP |
Myc • MITF • SREBP (1, 2) |
| (1.6) Basic helix-span-helix (bHSH) |
AP-2 |
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(2) Zinc finger
DNA-binding domains |
| (2.1) Nuclear receptor (Cys4) |
subfamily 1 (Thyroid hormone (α, β), CAR, FXR, LXR (α, β), PPAR (α, β/δ, γ), PXR, RAR (α, β, γ), ROR (α, β, γ), Rev-ErbA (α, β), VDR) • subfamily 2 (COUP-TF (I, II), Ear-2, HNF4 (α, γ), PNR, RXR (α, β, γ), Testicular receptor (2, 4), TLX) • subfamily 3 (Steroid hormone (Estrogen (α, β), Estrogen related (α, β, γ), Androgen, Glucocorticoid, Mineralocorticoid, Progesterone)) • subfamily 4 NUR (NGFIB, NOR1, NURR1) • subfamily 5 (LRH-1, SF1) • subfamily 6 (GCNF) • subfamily 0 (DAX1, SHP) |
| (2.2) Other Cys4 |
GATA (1, 2, 3, 4, 5, 6) |
| (2.3) Cys2His2 |
General transcription factors (TFIIA, TFIIB, TFIID, TFIIE, TFIIF, TFIIH: 1, 2) • GLI-Krüppel family (1, 2, 3, YY1) • KLF (2, 4, 5, 6, 10, 11, 12, 13) • Sp1 • zinc finger (3, 35, 43, 146, 148, 165, 217, 268, 281, 350) • Zbtb7 (7A) • ZBT (16, 17, 33) |
| (2.4) Cys6 |
HIVEP1 |
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(3) Helix-turn-helix
domains |
| (3.1) Homeo domain |
ARX • Homeobox (A1, A3, A4, A5, A7, A9, A10, A11, A13, B1, B2, B3, B4, B5, B6, B7, B8, B9, B13, C4, C6, C8, C9, C13, D1, D3, D4, D9, D10, D11, D12, D13) • NANOG • NKX (2-1, 2-5, 3-1) • POU domain (PIT-1, BRN-3: 1, 2, Octamer transcription factor: 1, 2, 3/4, 6, 7) |
| (3.2) Paired box |
PAX (1, 2, 3, 4, 5, 6, 7, 8, 9) |
| (3.3) Fork head / winged helix |
E2F (1, 2, 3, 4, 5) • FOX proteins (C1, C2, E1, G1, H1, L2, M1, N3, O3, O4, P1, P2, P3) |
| (3.4) Heat Shock Factors |
HSF1 |
| (3.5) Tryptophan clusters |
ELF (4, 5) • Interferon regulatory factors (1, 2, 3, 4, 5, 6, 7, 8) • MYB |
| (3.6) TEA domain |
transcriptional enhancer factor 1, 2 |
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(4) β-Scaffold factors with
minor groove contacts |
| (4.1) Rel homology region |
NF-κB (NFKB1, NFKB2, REL, RELA, RELB) • NFAT (5, C1, C2, C3, C4) |
| (4.2) STAT |
STAT (1, 2, 3, 4, 5, 6) |
| (4.3) p53 |
p53 |
| (4.4) MADS box |
Mef2 (A, B, C, D) • SRF |
| (4.7) High mobility group |
HNF (1A, 1B) • LEF1 • SOX (3, 4, 6, 9, 10, 13, 18) • SRY • SSRP1 |
| (4.10) Cold-shock domain |
CSDA |
| (4.11) Runt |
CBF (RUNX1, RUNX2, RUNX3) |
|
(0) Other
transcription factors |
| (0.2) HMGI(Y) |
HMGA (1, 2) |
| (0.3) Pocket domain |
Rb • RBL1 • RBL2 |
| (0.6) Miscellaneous |
ARID (1A, 1B, 2, 3A, 3B, 4A) • CAP • Rho/Sigma • R-SMAD |
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