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I14-Hard X-ray Nanoprobe	Periplasmic bacterial biomineralization of copper sulfide nanoparticles Yeseul Park , Zohar Eyal , Péter Pekker , Daniel M. Chevrier , Christopher T. Lefèvre , Pascal Arnoux , Jean Armengaud , Caroline L. Monteil , Assaf Gal , Mihály Pósfai , Damien Faivre Advanced Science 18 DOI: 10.1002/advs.202203444 Diamond Proposal Number(s): [23693] Open Access Show Abstract ▼ Abstract: Metal sulfides are a common group of extracellular bacterial biominerals. However, only a few cases of intracellular biomineralization are reported in this group, mostly limited to greigite (Fe3S4) in magnetotactic bacteria. Here, a previously unknown periplasmic biomineralization of copper sulfide produced by the magnetotactic bacterium Desulfamplus magnetovallimortis strain BW-1, a species known to mineralize greigite (Fe3S4) and magnetite (Fe3O4) in the cytoplasm is reported. BW-1 produces hundreds of spherical nanoparticles, composed of 1–2 nm substructures of a poorly crystalline hexagonal copper sulfide structure that remains in a thermodynamically unstable state. The particles appear to be surrounded by an organic matrix as found from staining and electron microscopy inspection. Differential proteomics suggests that periplasmic proteins, such as a DegP-like protein and a heavy metal-binding protein, could be involved in this biomineralization process. The unexpected periplasmic formation of copper sulfide nanoparticles in BW-1 reveals previously unknown possibilities for intracellular biomineralization that involves intriguing biological control and holds promise for biological metal recovery in times of copper shortage.	Aug 2022

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I14-Hard X-ray Nanoprobe

Periplasmic bacterial biomineralization of copper sulfide nanoparticles