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Hypoxia-inducible factor 1alpha

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Definition

noun

A sensitive transcriptional activator protein that responds to change in oxygen offered in thecellular environment.

Supplement

Hypoxia-inducible factor 1-alpha is encoded by the HIF1A gene wherein two different transcripts of isoform have been identified. HIF-1alpha belongs to the subfamily of the basic helix-loop-helix family of transcription factors. This alpha subunit of HIF is hydroxylated at preserved proline residues by an enzyme prolyl-hydroxylase permitting recognition and ubiquitination that marked for fast degradation by the proteasome.

HIF-1alpha is expected to have serious consequences in disease with chronic inflammatory element where it revealed thatchronic inflammation is self-perpetuating that deformed the micro-environment as a consequence of abnormally vigorous transcription factors. In effect the change in growth factor, ROS balance, cytokine and chemokine arises within the cellular environment and turns out to endow the growth and endurance required for the development of cancer and metastasis.

Hypoxia-inducible factor 1-alpha is the most important mediating factors in response to low oxygen pressure in cells and tissues that direct transcriptional induction in sequence of genes partakes in angiogenesis, glucose metabolism, cell proliferation and iron metabolism. In hypoxia the HIF-1α subunit turn out to be constant and interact with co-activators such as cAMP, an element-binding protein that control the expression of target genes.

Gene name: HIF1A

Protein name: Hypoxia-inducible factor 1-alpha

Synonyms:

ARNT-interacting protein

Basic-helix-loop-helix-PAS protein MOP1

Class E basic helix-loop-helix protein 78

See also:

Hypoxia