FOXOs are highly dynamic transcription factors consisting of one conserved DNA-binding domain (forkhead domain) as well as intrinsically disordered regions (IDRs) at the N- and C-termini. These IDRs are essential and regulate transcriptional activity of FOXOs by serving as interaction platform for cofactors. Furthermore, the IDRs are involved in intra- and intermolecular homeotypic and heterotypic interactions between FOXOs and in turn mediate FOXO auto-inhibition and condensate formation.
View Article and Find Full Text PDFThe insulin-like growth factor 2 mRNA binding protein 1 (IGF2BP1) is a conserved RNA-binding protein that regulates RNA stability, localization and translation. IGF2BP1 is part of various ribonucleoprotein (RNP) condensates. However, the mechanism that regulates its assembly into condensates remains unknown.
View Article and Find Full Text PDFMetabolic enzymes can adapt during energy stress, but the consequences of these adaptations remain understudied. Here, we discovered that hexokinase 1 (HK1), a key glycolytic enzyme, forms rings around mitochondria during energy stress. These HK1-rings constrict mitochondria at contact sites with the endoplasmic reticulum (ER) and mitochondrial dynamics protein (MiD51).
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