Biomembrane-affinity centrifugal analyses of solute interactions with membrane proteins.
We have developed a rapid centrifugal method for analyzing solute interactions with membrane proteins in cytoskeleton-depleted membrane vesicles or proteoliposomes sterically immobilized in Superdex 200 gel beads. The size and density of the gel beads allow fast sedimentation in a bench-top centrifuge. Biospecific interactions of cytochalasin B and D-glucose with the human red cell glucose transporter, Glut1, were analyzed. The binding constants and the molar ratio of inhibitor sites per protein monomer agreed well with recent results obtained by frontal affinity chromatography.
Lundqvist
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Department of Biochemistry, Biomedical Center, Uppsala University, Sweden.
Lundahl
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P
D002462:Cell Membrane / Q000378:metabolism*; D002498:Centrifugation / Q000379:methods*; D051272:Glucose Transporter Type 1; D008565:Membrane Proteins / Q000378:metabolism*; D009004:Monosaccharide Transport Proteins / Q000378:metabolism*; D011485:Protein Binding
D051272:Glucose Transporter Type 1; D008565:Membrane Proteins; D009004:Monosaccharide Transport Proteins