Protein: Hypoxia-inducible factor 1-alpha (HIF-1-alpha) (HIF1-alpha) (ARNT-interacting protein) (Basic-helix-loop-helix-PAS protein MOP1) (Class E basic helix-loop-helix protein 78) (bHLHe78) (Member of PAS protein 1) (PAS domain-containing protein 8) (Q16665)
Organism: Homo sapiens (Human)
Function: Functions as a master transcriptional regulator of the adaptive response to hypoxia. Under hypoxic conditions, activates the transcription of over 40 genes, including erythropoietin, glucose transporters, glycolytic enzymes, vascular endothelial growth factor, HILPDA, and other genes whose protein products increase oxygen delivery or facilitate metabolic adaptation to hypoxia. Plays an essential role in embryonic vascularization, tumor angiogenesis and pathophysiology of ischemic disease. Heterodimerizes with ARNT; heterodimer binds to core DNA sequence 5'-TACGTG-3' within the hypoxia response element (HRE) of target gene promoters (By similarity). Activation requires recruitment of transcriptional coactivators such as CREBBP and EP300. Activity is enhanced by interaction with NCOA1 and/or NCOA2. Interaction with redox regulatory protein APEX1 seems to activate CTAD and potentiates activation by NCOA1 and CREBBP. Involved in the axonal distribution and transport of mitochondria in neurons during hypoxia.
Subcellular location: Cytoplasm {ECO:0000269|PubMed:9822602}. Nucleus {ECO:0000269|PubMed:22009797, ECO:0000269|PubMed:9822602}. Nucleus speckle {ECO:0000250|UniProtKB:Q61221}. Note=Colocalizes with HIF3A in the nucleus and speckles (By similarity). Cytoplasmic in normoxia, nuclear translocation in response to hypoxia (PubMed:9822602). {ECO:0000250|UniProtKB:Q61221, ECO:0000269|PubMed:9822602}.
Sequence: MEGAGGANDKKKISSERRKEKSRDAARSRRSKESEVFYELAHQLPLPHNVSSHLDKASVMRLTISYLRVRKLLDAGDLDIEDDMKAQMNCFYLKALDGFVMVLTDDGDMIYISDNVNKYMGLTQFELTGHSVFDFTHPCDHEEMREMLTHRNGLVKKGKEQNTQRSFFLRMKCTLTSRGRTMNIKSATWKVLHCTGHIHVYDTNSNQPQCGYKKPPMTCLVLICEPIPHPSNIEIPLDSKTFLSRHSLDMKFSYCDERITELMGYEPEELLGRSIYEYYHALDSDHLTKTHHDMFTKGQVTTGQYRMLAKRGGYVWVETQATVIYNTKNSQPQCIVCVNYVVSGIIQHDLIFSLQQTECVLKPVESSDMKMTQLFTKVESEDTSSLFDKLKKEPDALTLLAPAAGDTIISLDFGSNDTETDDQQLEEVPLYNDVMLPSPNEKLQNINLAMSPLPTAETPKPLRSSADPALNQEVALKLEPNPESLELSFTMPQIQDQTPSPSDGSTRQSSPEPNSPSEYCFYVDSDMVNEFKLELVEKLFAEDTEAKNPFSTQDTDLDLEMLAPYIPMDDDFQLRSFDQLSPLESSSASPESASPQSTVTVFQQTQIQEPTANATTTTATTDELKTVTKDRMEDIKILIASPSPTHIHKETTSATSSPYRDTQSRTASPNRAGKGVIEQTEKSHPRSPNVLSVALSQRTTVPEEELNPKILALQNAQRKRKMEHDGSLFQAVGIGTLLQQPDDHAATTSLSWKRVKGCKSSEQNGMEQKTIILIPSDLACRLLGQSMDESGLPQLTSYDCEVNAPIQGSRNLLQGEELLRALDQVN
InterPro domains: - IPR014887: HIF-1 alpha, C-terminal transactivation domain (domain) [790-825]
- IPR013767: PAS fold (domain) [94-149]
- IPR000014: PAS domain (domain) [87-338]
- IPR013655: PAS fold-3 (domain) [254-339]
- IPR036638: Helix-loop-helix DNA-binding domain superfamily (homologous_superfamily) [8-70]
- IPR001321: Hypoxia-inducible factor-1 alpha (family) [201-477]
- IPR011598: Myc-type, basic helix-loop-helix (bHLH) domain (domain) [1-80]
- IPR035965: PAS domain superfamily (homologous_superfamily) [96-343]
- IPR001610: PAC motif (repeat) [302-345]
- IPR021537: Hypoxia-inducible factor, alpha subunit-like (domain) [555-580]
Interaction partners: - Prolyl hydroxylase EGLN3
- Aryl hydrocarbon receptor nuclear translocator
- Cullin-2
- CREB-binding protein
- Hypoxia-inducible factor 1-alpha inhibitor
- Aryl hydrocarbon receptor nuclear translocator 2
- Prolyl hydroxylase EGLN2
- Cellular tumor antigen p53
- Histone acetyltransferase p300
- Elongin-B
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0065007 (biological regulation), GO:0048518 (positive regulation of biological process), GO:0050789 (regulation of biological process), GO:0048522 (positive regulation of cellular process), GO:0019222 (regulation of metabolic process), GO:0050794 (regulation of cellular process), GO:0009893 (positive regulation of metabolic process), GO:0010604 (positive regulation of macromolecule metabolic process), GO:0031325 (positive regulation of cellular metabolic process), GO:0009889 (regulation of biosynthetic process), GO:0051171 (regulation of nitrogen compound metabolic process), GO:0060255 (regulation of macromolecule metabolic process), GO:0031323 (regulation of cellular metabolic process), GO:0080090 (regulation of primary metabolic process), GO:0009891 (positive regulation of biosynthetic process), GO:0051173 (positive regulation of nitrogen compound metabolic process), GO:0010557 (positive regulation of macromolecule biosynthetic process), GO:0045935 (positive regulation of nucleobase-containing compound metabolic process), GO:0051254 (positive regulation of RNA metabolic process), GO:0010556 (regulation of macromolecule biosynthetic process), GO:0031326 (regulation of cellular biosynthetic process), GO:0019219 (regulation of nucleobase-containing compound metabolic process), GO:0051252 (regulation of RNA metabolic process), GO:0031328 (positive regulation of cellular biosynthetic process), GO:0010468 (regulation of gene expression), GO:1902680 (positive regulation of RNA biosynthetic process), GO:2001141 (regulation of RNA biosynthetic process), GO:0006355 (regulation of DNA-templated transcription), GO:0006357 (regulation of transcription by RNA polymerase II), GO:0045893 (positive regulation of DNA-templated transcription), GO:1903508 (positive regulation of nucleic acid-templated transcription), GO:1903506 (regulation of nucleic acid-templated transcription), GO:0045944 (positive regulation of transcription by RNA polymerase II)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0031974 (membrane-enclosed lumen), GO:0016604 (nuclear body), GO:0005654 (nucleoplasm), GO:0043233 (organelle lumen), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0031981 (nuclear lumen), GO:0005634 (nucleus)