Source: | Rabbit | Gene Id: | 405 |
Isotype: | IgG | Swiss Prot: | P27540 |
purity: | Affinity purification |
Background: |
Hypoxia-inducible factor 1 (HIF1) is a heterodimeric transcription factor that plays a critical role in the cellular response to hypoxia (1). The HIF1 complex consists of two subunits, HIF-1α and HIF-1β, which are basic helix-loop-helix proteins of the PAS (Per, ARNT, Sim) family (2). HIF1 regulates the transcription of a broad range of genes that facilitate responses to the hypoxic environment, including genes regulating angiogenesis, erythropoiesis, cell cycle, metabolism and apoptosis. The widely expressed HIF-1α is typically degraded rapidly in normoxic cells by the ubiquitin/proteasomal pathway. Under normoxic conditions, HIF-1α is proline hydroxylated leading to a conformational change that promotes binding to the von Hippel Lindau protein (VLH) E3 ligase complex; ubiquitination and proteasomal degradation follows (3,4). Both hypoxic conditions and chemical hydroxylase inhibitors (such as desferrioxamine and cobalt) inhibit HIF-1α degradation and lead to its stabilization. In addition, HIF-1α can be induced in an oxygen-independent manner by various cytokines through the PI3K-AKT-mTOR pathway (5-7).HIF-1β is also known as AhR nuclear translocator (ARNT) due to its ability to partner with the aryl hydrocarbon receptor (AhR) to form a heterodimeric transcription factor complex (8). Together with AhR, HIF-1β plays an important role in xenobiotics metabolism (8). In addition, a chromosomal translocation leading to a TEL-ARNT fusion protein is associated with acute myeloblastic leukemia (9). Studies also found that ARNT/HIF-1β expression levels decrease significantly in pancreatic islets from patients with type 2 diabetes, suggesting that HIF-1β plays an important role in pancreatic β-cell function (10). |
Reactivity | Human, Mouse, Rat |
Tested applications | WB IHC |
Clonality | Polyclonal Antibody |
Calculated MW | 87 kDa |
Recommended Dilutions |
WB 1:500-1:2000
IHC 1:50-1:200
|
Immunogen | A recombinant protein of human ARNT |
Storage | Store at -20°C or -80°C in PBS with 0.02% sodium azide and 50% glycerol. Avoid freeze/thaw cycles. |
Synonym | ARNT,HIF-1beta,HIF1B,HIF1BETA,TANGO,bHLHe2 |
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