Crystal Structure, Murky Function

Scientists have determined the crystal structures of bacterial translocator proteins, but their functions remain unclear.

Written byRuth Williams
| 4 min read

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Crystal structure of TSPO from Rhodobacter sphaeroidesFEI LI

Translocator protein (TSPO) is highly conserved across the kingdoms of life and, in humans, is implicated in a variety of diseases. This integral mitochondrial membrane protein is undoubtedly important, but its exact function is a matter of controversy. Two papers published today (January 29) in Science describing the crystal structure of bacterial TSPO should help resolve the matter, although they contradict a previously proposed structure.

“The structures themselves are really beautiful,” said structural biologist Chris Tate of the Medical Research Council’s Laboratory of Molecular Biology in Cambridge, UK, who was not involved in the studies. “Membrane proteins are very difficult to work on . . . so when you have two independent groups actually coming up with seemingly identical or very similar structures, it’s very ...

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Meet the Author

  • ruth williams

    Ruth is a freelance journalist. Before freelancing, Ruth was a news editor for the Journal of Cell Biology in New York and an assistant editor for Nature Reviews Neuroscience in London. Prior to that, she was a bona fide pipette-wielding, test tube–shaking, lab coat–shirking research scientist. She has a PhD in genetics from King’s College London, and was a postdoc in stem cell biology at Imperial College London. Today she lives and writes in Connecticut.

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