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Heating of proteins as a means of improving crystallization: a successful case study on a highly amyloidogenic triple mutant of human transthyretin

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The use of high temperatures in the purification procedures of heat‐stable proteins is a well established technique. Recently, rapid pre‐heat treatment of protein samples prior to crystallization trials was described as a final polishing step to improve the diffraction properties of crystals [Pusey et al. (2005), Prog. Biophys. Mol. Biol. 88, 359–386]. The present study demonstrates that extended high‐temperature incubation (328 K for 48 h) of the highly amyloidogenic transthyretin mutant TTR G53S/E54D/L55S successfully removes heterogeneities and allows the reproducible growth of well diffracting crystals. Heat treatment might be applied as an optimization method to other cases in which the protein/biomolecule fails to form diffracting crystals.
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Keywords: TTR; amyloid; heating; transthyretin

Document Type: Research Article

Affiliations: Umeå Centre for Molecular Pathogenesis, Umeå University, SE-901 87 Umeå, Sweden

Publication date: August 1, 2007

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