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QT:{{”
• Find 3.8 Å resolution cryo-EM structure of the ∼200 kDa magnesium channel CorA • Mg2+-free CorA exhibits dramatic loss of symmetry in the cytoplasmic domain …
• Inter-subunit Mg2+ is important for stabilizing the closed state of CorA “}}

#CryoEM Structures of the Mg++ Channel CorA Reveal Symmetry Break upon Gating https://www.ScienceDirect.com/science/article/pii/S0092867415017195 In closed conformation: 5 identical subunits arranged tightly around 5-fold axis & pore. In open: they lose bridging ions & open to differing degrees with helix-hinging motions.

Matthies D1, Dalmas O2, Borgnia MJ1, Dominik PK2, Merk A1, Rao P1, Reddy BG2, Islam S2, Bartesaghi A1, Perozo E3, Subramaniam S4. Cell. 2016 Feb 11;164(4):747-56. doi: 10.1016/j.cell.2015.12.055.

Structural Memory Influences Ligand-Binding Mode http://pubs.ACS.org/doi/abs/10.1021/acs.jctc.5b01052 Rearrangement of #solvation layer is ~100x slower than unbinding

J Chem Theory Comput. 2016 Mar 8;12(3):1393-9. doi:
10.1021/acs.jctc.5b01052. Epub 2016 Feb 3.

Xu M, Caflisch A, Hamm P.