Abstract:
:Yeast dehydrogenases and reductases were overexpressed in Saccharomyces cerevisiae D452-2 to detoxify 2-furaldehyde (furfural) and 5-hydroxymethyl furaldehyde (HMF), two potent toxic chemicals present in acid-hydrolyzed cellulosic biomass, and hence improve cell growth and ethanol production. Among those enzymes, aldehyde dehydrogenase 6 (ALD6) played the dual roles of direct oxidation of furan derivatives and supply of NADPH cofactor to their reduction reactions. Batch fermentation of S. cerevisiae D452-2/pH-ALD6 in the presence of 2g/L furfural and 0.5 g/L HMF resulted in 20-30% increases in specific growth rate, ethanol concentration and ethanol productivity, compared with those of the wild type strain. It was proposed that overexpression of ALD6 could recover the yeast cell metabolism and hence increase ethanol production from lignocellulosic biomass containing furan-derived inhibitors.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Park SE,Koo HM,Park YK,Park SM,Park JC,Lee OK,Park YC,Seo JHdoi
10.1016/j.biortech.2011.02.101subject
Has Abstractpub_date
2011-05-01 00:00:00pages
6033-8issue
10eissn
0960-8524issn
1873-2976pii
S0960-8524(11)00307-5journal_volume
102pub_type
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