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Cryo‐EM structure of the MinCD copolymeric filament from Pseudomonas aeruginosa at 3.1 Å resolution

DOI: 10.1002/1873-3468.13471 DOI Help

Authors: Andrzej Szewczak-harris (MRC Laboratory of Molecular Biology) , James Wagstaff (MRC Laboratory of Molecular Biology) , Jan Lowe (MRC Laboratory of Molecular Biology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Febs Letters

State: Published (Approved)
Published: June 2019
Diamond Proposal Number(s): 17434

Open Access Open Access

Abstract: Positioning of the division site in many bacterial species relies on the MinCDE system, which prevents the cytokinetic Z‐ring from assembling anywhere but the mid‐cell, through an oscillatory diffusion‐reaction mechanism. MinD dimers bind to membranes and, via their partner MinC, inhibit the polymerization of cell division protein FtsZ into the Z‐ring. MinC and MinD form polymeric assemblies in solution and on cell membranes. Here, we report the high‐resolution cryo‐EM structure of the copolymeric filaments of Pseudomonas aeruginosa MinCD. The filaments consist of three protofilaments made of alternating MinC and MinD dimers. The MinCD protofilaments are almost completely straight and assemble as single protofilaments on lipid membranes, which we also visualized by cryo‐EM.

Journal Keywords: bacterial cytoskeleton; cell division; cryo‐EM; helical reconstruction; protein filaments; WACA

Subject Areas: Biology and Bio-materials

Diamond Offline Facilities: Electron Bio-Imaging Centre (eBIC)
Instruments: Krios I-Titan Krios I at Diamond


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