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

Denaturation of proteins during heat shock. In vivo recovery of solubility and activity of reporter enzymes.

Using beta-galactosidase and luciferase as reporter enzymes, we have previously shown that enzymatic inactivation occurring during a heat shock is concomitant with protein insolubilization (Nguyen, V. T., Morange, M., and Bensaude, O. (1989) J. Biol. Chem. 264, 10487-10492). In this paper, we observe that pretreatment of cells with D2O and glycerol, compounds known to stabilize protein structure, leads to a parallel decrease of protein inactivation and insolubilization, suggesting that these two phenomena result most probably from heat-induced protein denaturation. We found that heat shock-promoted inactivation and insolubilization are not irreversible processes, since even in the absence of protein synthesis, beta-galactosidase solubility and luciferase solubility and activity are recovered in vivo after a heat treatment. Cognate heat shock proteins might be involved in this renaturation process.[1]


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