Hepatocyte nuclear factor 4

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Identifiers
Symbol HNF4A
Alt. Symbols TCF14, MODY, MODY1
Entrez 3172
HUGO 5024
OMIM 600281
PDB 1M7W
RefSeq NM_001030004
UniProt P41235
Other data
Locus Chr. 20 q12-20q13.1
Identifiers
Symbol HNF4G
Entrez 3174
HUGO 5026
OMIM 605966
PDB 1LV2
RefSeq NM_004133
UniProt Q14541
Other data
Locus Chr. 8 q21-q22

HNF4 (Hepatocyte Nuclear Factor 4) is a nuclear receptor protein mostly expressed in the liver, gut, kidney, and pancreatic beta cells that is critical for liver development. In humans, there are two isoforms of NHF4, alpha and gamma encoded by two separate gene HNF4A and HNF4G respectively.[1]

Ligands

HNF4 was originally classified as an orphan receptor. However HNF4 was found later to be constitutively active by virtue of being continuously bound to a variety of fatty acids.[2][3] The ligand binding domain of HNF4, as with other nuclear receptors, adopts a canonical alpha helical sandwich fold[4][5] and interacts with co-activator proteins.[6]

Pathology

Mutations in the HNF4-α gene have been linked to maturity onset diabetes of the young (MODY).[7]

See also

References

  1. ↑ Chartier FL, Bossu JP, Laudet V, Fruchart JC, Laine B (1994). "Cloning and sequencing of cDNAs encoding the human hepatocyte nuclear factor 4 indicate the presence of two isoforms in human liver". Gene 147 (2): 269-72. doi:10.1016/0378-1119(94)90079-5. PMID 7926813.
  2. ↑ Sladek F (2002). "Desperately seeking...something". Mol Cell 10 (2): 219-21. doi:10.1016/S1097-2765(02)00605-6. PMID 12191466.
  3. ↑ Jump DB, Botolin D, Wang Y, Xu J, Christian B, Demeure O (2005). "Fatty acid regulation of hepatic gene transcription". J Nutr 135 (11): 2503-6. PMID 16251601.
  4. ↑ Wisely GB, Miller AB, Davis RG, Thornquest AD Jr, Johnson R, Spitzer T, Sefler A, Shearer B, Moore JT, Miller AB, Willson TM, Williams SP (2002). "Hepatocyte nuclear factor 4 is a transcription factor that constitutively binds fatty acids". Structure 10 (9): 1225-34. doi:10.1016/S0969-2126(02)00829-8. PMID 12220494.
  5. ↑ Dhe-Paganon S, Duda K, Iwamoto M, Chi YI, Shoelson SE (2002). "Crystal structure of the HNF4 alpha ligand binding domain in complex with endogenous fatty acid ligand". J Biol Chem 277 (41): 37973-6. doi:10.1074/jbc.C200420200. PMID 12193589.
  6. ↑ Duda K, Chi YI, Shoelson SE (2004). "Structural basis for HNF-4alpha activation by ligand and coactivator binding". J Biol Chem 279 (22): 23311-6. doi:10.1074/jbc.M400864200. PMID 14982928.
  7. ↑ Fajans SS, Bell GI, Polonsky KS (2001). "Molecular mechanisms and clinical pathophysiology of maturity-onset diabetes of the young". N Engl J Med 345 (13): 971-80. doi:10.1056/NEJMra002168. PMID 11575290.

External links

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v • d • e
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
(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
(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
(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
(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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