PYR-41
PYR-41 is the first cell permeable inhibitor of ubiquitin-activating enzyme E1, irreversibly inhibits ubiquitin-activating enzyme activity.It is a pyrazone compound that showed little or no activity on E2, E3.[1]
Unexpectedly, despite of ubiquitylation inhibition, PYR-41 also enhances total sumoylation in cells.[2]
PYR41 also blocks the downstream ubiquitination and ubiquitination-dependent protein degradation or other ubiquitination-mediated cellular activities. Besides, PYR-41 inhibits degradation of p53, a tumour suppressor and also activates the transcription activity of it.[3] PYR-41 and related pyrazones selectively kill transformed p53 expressing cells, suggesting that E1 inhibitors may be potential therapeutics in cancer.
References[edit | edit source]
- ↑ "biological activity of PYR41 in selleckchem". selleck chemicals LLC. Sep 25, 2014.
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Contributors: Prab R. Tumpati, MD
