The abstract is read at the publisher; the summary is JClub's.
Depleting MKRN1/2 impairs stress granule clearance by disrupting K48-linked polyubiquitylation and 26S proteasome recruitment, causing persistent arsenite- and heat-induced stress granules.
- Why it matters: Stress granule disassembly during recovery is linked to aging and neurodegeneration, yet the specific E3 ubiquitin ligases that enable clearance remain unclear.
- What they did: The study identifies RNF214 and MKRN1/MKRN2 as E3s that associate with arsenite- and heat-induced stress granules, then tests SG turnover after E3 depletion.
- The result: Loss of MKRN1/2, but not RNF214, blocks proteasome-dependent clearance, promotes misfolded protein accumulation and granulophagy-targeted persistent SGs, while co-depletion with RNF214 yields an additive clearance defect.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.