Key Highlights
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Phosphatidylserine (PS) is a critical membrane lipid component of the gradient-tracking machine (GTM) that yeast cells use to locate mating partners. Blocking PS synthesis causes severe gradient-tracking defects, establishing membrane lipids as integral to chemotropic sensing.
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TBK1-dependent phosphorylation at Ser403 of the p62 protein acts as a molecular switch that drives the transition of p62 condensates from fluid droplets to compact, gel-like structures. This phosphorylation accelerates the autophagic removal of ubiquitinated proteins, serving as a central control for protein degradation and proteostasis.
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A new comparative single-cell atlas of avian and mammalian lungs reveals a persistent hybrid cell population (AT1/AT2) in adult birds that disappears after birth in mice, uncovering divergent strategies for lung maintenance. The study also shows differential ACE2 expression but conserved EGFR, suggesting species-specific vulnerabilities to viruses like SARS-CoV-2 and influenza A.
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Research identifies that the transcription factor Fra-2 controls the response to the KRAS inhibitor MRTX-1133 in pancreatic ductal adenocarcinoma. This finding is significant because KRAS mutations are present in the majority of pancreatic cancer cases and are key drivers of tumor progression.
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Chaperone proteins have been shown to protect against amyloid aggregation caused by desmin fragments, a process linked to certain muscle diseases. This work, published in the Biophysical Journal, reveals a potential therapeutic avenue for preventing pathological protein clumping in cells.
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