Abstract:
:Simvastatin is a semisynthetic cholesterol-lowering medication and one of the top-selling statins in the world. Currently, industrial production of simvastatin acid (SVA) is a multistep process starting from the natural product lovastatin. For this reason, there is significant interest in direct production of simvastatin from a microbial host. In this study, six heterologous biosynthetic genes were introduced into Saccharomyces cerevisiae and the acyl-donor dimethylbutyryl-S-methyl mercaptopropionate (DMB-SMMP) was added, resulting in initial production of 0.5 mg/L SVA. Switching the yeast strain from JHY686 to BJ5464-NpgA increased total polyketide production to over 60 mg/L and conversion from dihydromonacolin L acid to monacolin J acid (MJA) was increased from 60% to 90% by tuning the copy number of the P450 lovA. Increasing the media pH to 8.7 led to a further 10-fold increase in SVA production. Optimized chemical lysis of the cell walls in situ after maximum MJA production led to 55 mg/L SVA titer, representing nearly complete conversion from MJA and a 110-fold increase in titer from the initial SVA production strain. The yeast strains developed in this work can be used as an alternative production method for SVA, and the strategies employed can be broadly applied for heterologous production of other fungal polyketides and semisynthetic compounds in yeast.
journal_name
Metab Engjournal_title
Metabolic engineeringauthors
Bond CM,Tang Ydoi
10.1016/j.ymben.2018.09.005subject
Has Abstractpub_date
2019-01-01 00:00:00pages
1-8eissn
1096-7176issn
1096-7184pii
S1096-7176(18)30234-9journal_volume
51pub_type
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journal_title:Metabolic engineering
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journal_title:Metabolic engineering
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doi:10.1016/j.ymben.2009.12.004
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doi:10.1016/j.ymben.2017.07.004
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