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A human cell is a precisely regulated system that relies on the complex interaction of molecules. Structural insights into the cellular machinery at the atomic level allow us to understand the underlying regulatory mechanism and provide us with a roadmap for the development of novel drugs to fight diseases. Facilitated by recent technological breakthroughs, the Nobel prize-winning technique electron...
Type VI secretion (T6S) influences the composition of microbial communities by catalyzing the delivery of toxins between adjacent bacterial cells. Here, we demonstrate that a T6S integral membrane toxin from Pseudomonas aeruginosa, Tse6, acts on target cells by degrading the universally essential dinucleotides NAD+ and NADP+. Structural analyses of Tse6 show that it resembles mono-ADP-ribosyltransferase...
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