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• W2022331504 endingPage "1502" @default.
• W2022331504 startingPage "1491" @default.
• W2022331504 abstract "The folding of heat-denatured ovalbumin, a non-inhibitory serpin with a molecular size of 45 kDa, was examined. Ovalbumin was heat-denatured at 80°C under nonreducing conditions at pH 7.5 and then cooled either slowly or rapidly. Slow cooling allowed the heat-denatured ovalbumin to refold to its native structure with subsequent resistance to digestion by trypsin. Upon rapid cooling, by contrast, the heat-denatured molecules assumed the metastable non-native conformations that were susceptible to trypsin. The non-native species were marginally stable for several days at a low temperature, but the molecules were transformed slowly into the native conformation. Considering data from size-exclusion chromatography and from analyses of CD, intrinsic tryptophan fluorescence, and adsorption of the dye 1-anilinonaphthalene-8-sulfonate, we postulated that the non-native species that accumulated upon rapid cooling were compact but structureless globules with disordered side chains collectively as a folding intermediate. Temperature-jumped CD experiments revealed biphasic kinetics for the refolding process of heat-denatured ovalbumin, with the features of increasing and subsequently decreasing amplitude of the rapid and the slow phases, respectively, with the decrease in folding temperature. The temperature dependence of the refolding kinetics indicated that the yield of renaturation was maximal at about 55°C. These findings suggested the kinetic partitioning of heat-denatured ovalbumin between alternative fates, slow renaturation to the native state and rapid collapse to the metastable intermediate state. Analysis of disulfide pairing revealed the formation of a scrambled form with non-native disulfide interactions in both the heat-denatured state and the intermediate state that accumulated upon rapid cooling, suggesting that non-native disulfide pairing is responsible for the kinetic barriers that retard the correct folding of ovalbumin." @default.
• W2022331504 created "2016-06-24" @default.
• W2022331504 creator A5004224999 @default.
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• W2022331504 date "1997-07-01" @default.
• W2022331504 modified "2023-10-03" @default.
• W2022331504 title "Temperature control for kinetic refolding of heat-denatured ovalbumin" @default.
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• W2022331504 doi "https://doi.org/10.1002/pro.5560060713" @default.
• W2022331504 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2143739" @default.
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• W2022331504 hasPublicationYear "1997" @default.
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