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Crystallization and preliminary X‐ray diffraction analysis of the full‐length Mg2+ transporter MgtE

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The MgtE family of Mg2+ transporters are ubiquitously conserved in all three domains. The genes encoding full‐length MgtE from seven different species were cloned. Three of the seven MgtE transporters were overexpressed and purified for use in crystallization trials. Only Thermus thermophilus MgtE was successfully crystallized using the sitting‐drop vapour‐diffusion method. Selenomethionine‐substituted (SeMet) crystals were obtained by cross‐microseeding using the native microcrystals. The SeMet crystals diffracted X‐rays to 3.5 Å resolution using synchrotron radiation and belong to space group C2221, with unit‐cell parameters a = 118.3, b = 134.9, c = 366.2 Å. Structure determination is in progress.
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Keywords: CBS domain; MgtE; lipids; magnesium; transporter

Document Type: Research Article

Publication date: August 1, 2007

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