Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 138, Issue -, Pages 958-965Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.07.103
Keywords
Refolding; Nanoparticles; Cholesterol oxidase
Funding
- Indian Institute of Technology Delhi
- MHRD, Government of India
- DST-SERB [PDF/2016/000090]
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Proteins are prone to unfolding and subsequent denaturation by changes in temperature, pH and other harsh conditions. Nanopartides act as artificial 'chaperones' due to favourable orientation of the proteins on their scaffold which prevents aggregation and reconfigures denatured proteins into their native functional state. In the present study, thermal denaturation of Cholesterol oxidases from Pseudomonas aeruginosa PseA, Rhodococcus erythropolis MTCC 3951 and Streptomyces sp. were studied at temperatures 50-70 degrees C. Further, these thermally de natured proteins were refolded using functionalized Magnetic Iron (II, III) oxide nanoparticles which was confirmed using DLS, Zeta Potential Measurements, fluorescence and CD spectroscopy. The refolded proteins were found to regain their secondary structure and activity to a great extent. (C) 2019 Elsevier B.V. All rights reserved.
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