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HIF1AN

hypoxia inducible factor 1, alpha subunit inhibitor

Hydroxylates HIF-1 alpha at 'Asp-803' in the C-terminal transactivation domain (CAD). Functions as an oxygen sensor and, under normoxic conditions, the hydroxylation prevents interaction of HIF-1 with transcriptional coactivators including Cbp/p300-interacting transactivator. Involved in transcriptional repression through interaction with HIF1A, VHL and histone deacetylases. Hydroxylates specific Asn residues within ankyrin repeat domains (ARD) of NFKB1, NFKBIA, NOTCH1, ASB4, PPP1R12A and several other ARD-containing proteins. Also hydroxylates Asp and His residues within ARDs of ANK1 and TNKS2, respectively. Negatively regulates NOTCH1 activity, accelerating myogenic differentiation. Positively regulates ASB4 activity, promoting vascular differentiation.

Gene Name: hypoxia inducible factor 1, alpha subunit inhibitor
Synonyms: HIF1AN, Factor inhibiting HIF-1, FIH1, Factor inhibiting HIF1, FIH-1
Target Sequences: NM_017902 NP_060372.2 Q9NWT6

Publications (15)

1
Genetic analysis of the role of the asparaginyl hydroxylase factor inhibiting hypoxia-inducible factor (FIH) in regulating hypoxia-inducible factor (HIF) transcriptional target genes [corrected]. Stolze IP, Tian YM, Appelhoff RJ, Turley H, Wykoff CC, Gleadle JM, Ratcliffe PJ. The Journal of biological chemistry. 2004 279:42719-25. [PubMed:15302861]
2
Use of novel monoclonal antibodies to determine the expression and distribution of the hypoxia regulatory factors PHD-1, PHD-2, PHD-3 and FIH in normal and neoplastic human tissues. Soilleux EJ, Turley H, Tian YM, Pugh CW, Gatter KC, Harris AL. Histopathology. 2005 47:602-10. [PubMed:16324198]
3
Posttranslational hydroxylation of ankyrin repeats in IkappaB proteins by the hypoxia-inducible factor (HIF) asparaginyl hydroxylase, factor inhibiting HIF (FIH). Cockman ME, Lancaster DE, Stolze IP, Hewitson KS, McDonough MA, Coleman ML, Coles CH, Yu X, Hay RT, Ley SC, Pugh CW, Oldham NJ, Masson N, Schofield CJ, Ratcliffe PJ. Proceedings of the National Academy of Sciences of the United States of America. 2006 103:14767-72. [PubMed:17003112] [PMC:PMC1578504]
4
ASB4 is a hydroxylation substrate of FIH and promotes vascular differentiation via an oxygen-dependent mechanism. Ferguson JE, Wu Y, Smith K, Charles P, Powers K, Wang H, Patterson C. Molecular and cellular biology. 2007 27:6407-19. [PubMed:17636018] [PMC:PMC2099627]
5
Protein kinase C-mediated modulation of FIH-1 expression by the homeodomain protein CDP/Cut/Cux. Li J, Wang E, Dutta S, Lau JS, Jiang SW, Datta K, Mukhopadhyay D. Molecular and cellular biology. 2007 27:7345-53. [PubMed:17682059] [PMC:PMC2168911]
6
Interaction with factor inhibiting HIF-1 defines an additional mode of cross-coupling between the Notch and hypoxia signaling pathways. Zheng X, Linke S, Dias JM, Zheng X, Gradin K, Wallis TP, Hamilton BR, Gustafsson M, Ruas JL, Wilkins S, Bilton RL, Brismar K, Whitelaw ML, Pereira T, Gorman JJ, Ericson J, Peet DJ, Lendahl U, Poellinger L. Proceedings of the National Academy of Sciences of the United States of America. 2008 105:3368-73. (WB) [PubMed:18299578] [PMC:PMC2265116]
7
The basic cleft of RPA70N binds multiple checkpoint proteins, including RAD9, to regulate ATR signaling. Xu X, Vaithiyalingam S, Glick GG, Mordes DA, Chazin WJ, Cortez D. Molecular and cellular biology. 2008 28:7345-53. [PubMed:18936170] [PMC:PMC2593429]
8
A feedback loop involving the Phd3 prolyl hydroxylase tunes the mammalian hypoxic response in vivo. Minamishima YA, Moslehi J, Padera RF, Bronson RT, Liao R, Kaelin WG. Molecular and cellular biology. 2009 29:5729-41. (WB; Mouse) [PubMed:19720742] [PMC:PMC2772748]
9
BRCA1 tumours correlate with a HIF-1alpha phenotype and have a poor prognosis through modulation of hydroxylase enzyme profile expression. Yan M, Rayoo M, Takano EA, Thorne H, Fox SB. British journal of cancer. 2009 101:1168-74. [PubMed:19724277] [PMC:PMC2768103]
10
Factor inhibiting HIF (FIH-1) promotes renal cancer cell survival by protecting cells from HIF-1-mediated apoptosis. Khan MN, Bhattacharyya T, Andrikopoulos P, Esteban MA, Barod R, Connor T, Ashcroft M, Maxwell PH, Kiriakidis S. British journal of cancer. 2011 104:1151-9. (WB; Human) [PubMed:21386837] [PMC:PMC3068507]
11
Quantitative mass spectrometry reveals dynamics of factor-inhibiting hypoxia-inducible factor-catalyzed hydroxylation. Singleton RS, Trudgian DC, Fischer R, Kessler BM, Ratcliffe PJ, Cockman ME. The Journal of biological chemistry. 2011 286:33784-94. [PubMed:21808058] [PMC:PMC3190818]
12
Synthetic transactivation screening reveals ETV4 as broad coactivator of hypoxia-inducible factor signaling. Wollenick K, Hu J, Kristiansen G, Schraml P, Rehrauer H, Berchner-Pfannschmidt U, Fandrey J, Wenger RH, Stiehl DP. Nucleic acids research. 2012 40:1928-43. [PubMed:22075993] [PMC:PMC3300025]
13
Factor inhibiting HIF (FIH) recognizes distinct molecular features within hypoxia-inducible factor- (HIF-) versus ankyrin repeat substrates. Wilkins SE, Karttunen S, Hampton-Smith RJ, Murchland I, Chapman-Smith A, Peet DJ. The Journal of biological chemistry. 2012 287:8769-81. [PubMed:22270367] [PMC:PMC3308777]
14
Increased activation of the hypoxia-inducible factor pathway in varicose veins. Lim CS, Kiriakidis S, Paleolog EM, Davies AH. Journal of vascular surgery. 2012 55:1427-39. (WB; Human) [PubMed:22277691]
15
MT1-MMP plays a critical role in hematopoiesis by regulating HIF-mediated chemokine/cytokine gene transcription within niche cells. Nishida C, Kusubata K, Tashiro Y, Gritli I, Sato A, Ohki-Koizumi M, Morita Y, Nagano M, Sakamoto T, Koshikawa N, Kuchimaru T, Kizaka-Kondoh S, Seiki M, Nakauchi H, Heissig B, Hattori K. Blood. 2012 119:5405-16. [PubMed:22544701]
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0.312 - 20 ng/ml
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0.156 - 10 ng/ml
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31.25 - 2000 pg/ml
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The data on this page has been compiled from LifeSpan internal sources, the National Center for Biotechnology Information (NCBI), and The Universal Protein Resource (UniProt).