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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Solubilization and reconstitution of sodium-dependent transport system for branched-chain amino acids from Pseudomonas aeruginosa.

The sodium-dependent transport system for branched-chain amino acids of Pseudomonas aeruginosa was solubilized with n-octyl-beta-D-glucopyranoside and reconstituted into liposomes by a detergent-Sephadex G-50 gel filtration procedure. The reconstituted proteoliposomes exhibited Na+-dependent counterflow and Na+-gradient-driven transport of L-leucine, L-isoleucine, and L-valine. The leucine counterflow was specifically inhibited by only branched-chain amino acids and the uphill transport of two species of amino acids among the three was induced by counterflow of the other substrate. These results show that the transport system for branched-chain amino acids was reconstituted into liposomes from P. aeruginosa cells and strongly suggest that three branched-chain amino acids are transported by a common carrier system.[1]


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