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A recent study broadens the substrate profile of the COMPASS histone methyltransferase complex to include a kinetochore component and links the lysine methylation activity of COMPASS to the process of chromosome segregation.
RNA localization and translational control are crucial for cellular fine-tuning of gene expression in space and time. A recent meeting in Tucson, Arizona pointed out mechanisms conserved across different species and cell types that contribute to the establishment of cell polarity and cell migration. Furthermore, it is becoming increasingly clear that these post-transcriptional control processes are relevant for various diseases.
The stress-activated protein kinases PKR and GCN2 regulate protein synthesis by phosphorylating the α subunit of translation initiation factor 2. Three recent studies reveal the molecular basis for the exquisite substrate specificity of this family of kinases and address the role of interlobe flexibility in kinase activation.