'Digging up' 4-billion-year-old fossil protein structures to reveal how they evolved

Very little is known about how and when over the course of evolution 3-D protein structures arose. In a new study, researchers resurrected four-billion-year-old Precambrian proteins in the laboratory and gained novel insights into protein evolution by analyzing their X-ray crystal structures. This method has revealed a remarkable degree of structural similarity among proteins since life first evolved on this planet, and represents a powerful and novel approach to explore the evolution of protein structures.

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