De-centralizing the central dogma: mRNA translation in space and time
January 19, 2023
In a current review published in Molecular Cell, scientists at the Max Planck Institute for Brain Research discuss how local translation and its spatiotemporal regulation have expanded our conceptual understanding of genetic information flow within a cell (the Central Dogma). The authors review the mechanisms and molecules involved in mRNA localization and translation within subcellular domains across a variety of cells and organisms.
“As our understanding of the cell interior has grown, we have come to appreciate that most cellular operations are localized - they occur at discrete and identifiable locations or domains”, state the paper’s authors Bourke et al. “These cellular domains contain the enzymes, machines and other components necessary to carry out and regulate these localized operations.”
In their review, newly published in Molecular Cell, the scientists discuss the features of one such operation: the localization and translation of mRNAs within subcellular compartments observed across cell types and organisms. They describe the conceptual advantages and the “ingredients” and mechanisms of local translation and focus on the nature and features of localized mRNAs, how they travel and get localized and how this process is regulated. Furthermore, they evaluate the current understanding of the protein synthesis machines (ribosomes) and their cadre of regulatory elements - the translation factors.
The neocortex is the largest and most complex part of the brain, and has long been recognized as the ultimate storage site for memories. But how are traces of past events and experiences laid down there?