Polyols have unique ability to refold protein as compared to other osmolyte types

Effects of solvent environments on protein refolding have gained significant attention due to their biotechnological and pharmaceutical applications. Recent advances have shown that a number of organic osmolytes have the unique ability to induce proper folding of several misfolded proteins and simul...

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Bibliographic Details
Published in:Biochemistry (Moscow) 2017-04, Vol.82 (4), p.465-473
Main Authors: Sharma, G. S., Singh, L. R.
Format: Article
Language:English
Subjects:
Biocatalysts
Biochemistry
Biomedical and Life Sciences
Biomedicine
Bioorganic Chemistry
Biotechnology
Catalysis
Circular Dichroism
Enzymatic activity
Life Sciences
Microbiology
Observations
Physiological aspects
Polymers - chemistry
Polyols
Protein Folding
Proteins
Ribonuclease, Pancreatic - chemistry
Spectrophotometry, Ultraviolet
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Summary:Effects of solvent environments on protein refolding have gained significant attention due to their biotechnological and pharmaceutical applications. Recent advances have shown that a number of organic osmolytes have the unique ability to induce proper folding of several misfolded proteins and simultaneously inhibit aggregation during the process. In the present study, we investigated the effects of polyol osmolytes on the refolding of guanidinium chloride-denatured ribonuclease-A (RNase-A) and compared it with that of other osmolyte types. Measurements of enzymatic activity parameters ( K m and k cat ) clearly indicate that polyol-induced RNase-A folding enhanced its catalytic efficiency as compared to folding in the absence of osmolytes or in the presence of osmolytes of other types. Furthermore, structural characterization revealed that the increase in catalytic efficiency stems from conformational alterations of the polyol-induced folded protein molecules as compared to other types of osmolytes.
ISSN:0006-2979
1608-3040
DOI:10.1134/S0006297917040083