Effect of lipids on the refolding of heat-denatured MDH by the
multichaperone HSP17-KJELS system. MDH (1.2 μM) was denatured (30 min
47°C in buffer A containing 10 mM DTT) in the presence of HSP17 (7.2
μM). LUVs made of the indicated lipids were added to a final lipid
concentration of 360 μM before the heat treatment. Recovery of MDH
activity was followed at 25°C in the presence of ATP (1 mM), an
active ATP-regeneration system supplemented with KJELS chaperones
(derived from E. coli) (4, 0.8, 0.4, 4, and 6 μM,
respectively). The final concentration of MDH, HSP17, and LUVs were 1
μM, 6 μM, and 300 μM, respectively.