Functional properties of PDIA from Aspergillus niger in renaturation of proteins
Open Access
- 1 April 2005
- journal article
- Published by Oxford University Press (OUP) in FEMS Microbiology Letters
- Vol. 245 (2) , 363-368
- https://doi.org/10.1016/j.femsle.2005.03.026
Abstract
Functional properties of protein disulfide isomerase A (PDIA) from Aspergillus niger were investigated using ribonuclease A, glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and prochymosin as substrates. PDIA was shown to function as an isomerase catalyzing the refolding of denatured and reduced ribonuclease A. PDIA also exhibited trx-independent chaperone activity preventing the aggregation of reduced, denatured GAPDH, an enzyme lacking disulfide bonds. Both isomerase activity and chaperone function of PDIA were essential for the efficient refolding of the reduced, denatured prochymosin.Keywords
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