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© Research
Publication : Folding & design

Non-detergent sulphobetaines: a new class of molecules that facilitate in vitro protein renaturation

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Folding & design - 01 Jan 1996

Goldberg ME, Expert-Bezançon N, Vuillard L, Rabilloud T

Link to Pubmed [PMID] – 9079360

Fold Des 1996;1(1):21-7

BACKGROUND: Attempts to renature proteins often yield aggregates rather than native protein. To minimize aggregation, low protein concentrations and/or solubilizing agents are used. Here, we test new solubilizing molecules, non-detergent sulphobetaines, to improve the renaturation of two very different enzymes, hen egg white lysozyme and bacterial beta-D-galactosidase.

RESULTS: The renaturation was conducted in the presence of five different sulphobetaines and the yield of active enzyme was measured. The five sulphobetaines improved the yield of native lysozyme up to 12-fold. Some sulphobetaines improved the yield of galactosidase up to 80-fold, but one reduced it 100-fold.

CONCLUSIONS: Non-detergent sulphobetaines strongly affect the balance between aggregation and folding. Their effect depends on their structure and on their interactions with folding intermediates. These results should serve as a basis for designing more efficient sulphobetaines; for designing improved renaturation protocols using existing sulphobetaines; and for characterizing folding intermediates that interact with sulphobetaines.