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Viviane was a Churchill Scholar at the University of Cambridge, where she studied early tetrapods. Her PhD at Duke University focused on the role of oxygen in insect body size…
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ABOVE: When the bacterium Caulobacter crescentus runs low on fuel, it can still replicate by clustering its remaining ATP around the cell division enzyme DivJ © NANOCLUSTERING.COM
When nutrients are scarce and ATP levels are low, a condensate forms inside Caulobacter crescentus, concentrating DivJ, an enzyme critical for cell division. At sufficiently high local concentrations, DivJ can better utilize the molecules of ATP available to it, powering cell division. When researchers prevented the formation of condensates under ATP depletion, the concentration of DivJ was too low to efficiently use the dwindling fuel reserves. As a result, bacterial cells could grow but not divide, producing abnormally elongated shapes.
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This article was featured in July 2022, Issue 2 of the digest
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Is the current biodiversity crisis on par with the five biggest in Earth’s history?
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