Abstract
HIF-1α plays a crucial part in hypoxia response by transcriptionally upregulating genes to adapt the hypoxic condition. HIF-1α is under severe cellular control as its exceptional activation is always associated with tumorigenesis and tumor progression. Here, we report L3MBTL3 serves as a novel negative regulator of HIF-1α. It is upregulated during hypoxia and acts as a transcriptional target of HIF-1α. In the nuclei, L3MBTL3 makes an interaction with HIF-1α and promotes its ubiquitination and degradation. These findings indicate L3MBTL3 forms a negative feedback loop with HIF-1α in vitro to dampen the hypoxic response.
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