Journal
JOURNAL OF BIOTECHNOLOGY
Volume 150, Issue 4, Pages 539-545Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jbiotec.2010.10.004
Keywords
Biocatalytic promiscuity; Protease; Pepsin; Aldol reaction
Categories
Funding
- National Science Foundation of China [20972104, 20725206, 20732004]
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Several proteases, especially pepsin, were observed to directly catalyze asymmetric aldol reactions. Pepsin, which displays well-documented proteolytic activity under acidic conditions, exhibited distinct catalytic activity in a crossed alclol reaction between acetone and 4-nitrobenzaldehyde with high yield and moderate enantioselectivity. Fluorescence experiments indicated that under neutral pH conditions, pepsin maintains its native conformation and that the natural structure plays an important role in biocatalytic promiscuity. Moreover, no significant loss of enantioselectivity was found even after four cycles of catalyst recycling, showing the high stability of pepsin under the selected aqueous reaction conditions. This case of biocatalytic promiscuity not only expands the application of proteases to new chemical transformations, but also could be developed into a potentially valuable method for green organic synthesis. (C) 2010 Elsevier B.V. All rights reserved.
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