Abstract
| Language | English |
|---|---|
| Article number | 3202 |
| Number of pages | 11 |
| Journal | Frontiers in Microbiology |
| Volume | 9 |
| DOIs | |
| Publication status | Published - 21 Dec 2018 |
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Contribution of Eat1 and other alcohol acyltransferases to ester production in Saccharomyces cerevisiae. / Kruis, A.J.; Gallone, Brigida; Jonker, T.; Mars, A.E.; van Rijswijck, I.M.H.; Wolkers-Rooijackers, J.C.M.; Smid, E.J.; Steensels, Jan; Verstrepen, Kevin J.; Kengen, S.W.M.; van der Oost, J.; Weusthuis, R.A.
In: Frontiers in Microbiology, Vol. 9, 3202, 21.12.2018.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Contribution of Eat1 and other alcohol acyltransferases to ester production in Saccharomyces cerevisiae
AU - Kruis, A.J.
AU - Gallone, Brigida
AU - Jonker, T.
AU - Mars, A.E.
AU - van Rijswijck, I.M.H.
AU - Wolkers-Rooijackers, J.C.M.
AU - Smid, E.J.
AU - Steensels, Jan
AU - Verstrepen, Kevin J.
AU - Kengen, S.W.M.
AU - van der Oost, J.
AU - Weusthuis, R.A.
PY - 2018/12/21
Y1 - 2018/12/21
N2 - Esters are essential for the flavor and aroma of fermented products, and are mainly produced by alcohol acyl transferases (AATs). A recently discovered AAT family named Eat (Ethanol acetyltransferase) contributes to ethyl acetate synthesis in yeast. However, its effect on the synthesis of other esters is unknown. In this study, the role of the Eat family in ester synthesis was compared to that of other Saccharomyces cerevisiae AATs (Atf1p, Atf2p, Eht1p, and Eeb1p) in silico and in vivo. A genomic study in a collection of industrial S. cerevisiae strains showed that variation of the primary sequence of the AATs did not correlate with ester production. Fifteen members of the EAT family from nine yeast species were overexpressed in S. cerevisiae CEN.PK2-1D and were able to increase the production of acetate and propanoate esters. The role of Eat1p was then studied in more detail in S. cerevisiae CEN.PK2-1D by deleting EAT1 in various combinations with other known S. cerevisiae AATs. Between 6 and 11 esters were produced under three cultivation conditions. Contrary to our expectations, a strain where all known AATs were disrupted could still produce, e.g., ethyl acetate and isoamyl acetate. This study has expanded our understanding of ester synthesis in yeast but also showed that some unknown ester-producing mechanisms still exist.
AB - Esters are essential for the flavor and aroma of fermented products, and are mainly produced by alcohol acyl transferases (AATs). A recently discovered AAT family named Eat (Ethanol acetyltransferase) contributes to ethyl acetate synthesis in yeast. However, its effect on the synthesis of other esters is unknown. In this study, the role of the Eat family in ester synthesis was compared to that of other Saccharomyces cerevisiae AATs (Atf1p, Atf2p, Eht1p, and Eeb1p) in silico and in vivo. A genomic study in a collection of industrial S. cerevisiae strains showed that variation of the primary sequence of the AATs did not correlate with ester production. Fifteen members of the EAT family from nine yeast species were overexpressed in S. cerevisiae CEN.PK2-1D and were able to increase the production of acetate and propanoate esters. The role of Eat1p was then studied in more detail in S. cerevisiae CEN.PK2-1D by deleting EAT1 in various combinations with other known S. cerevisiae AATs. Between 6 and 11 esters were produced under three cultivation conditions. Contrary to our expectations, a strain where all known AATs were disrupted could still produce, e.g., ethyl acetate and isoamyl acetate. This study has expanded our understanding of ester synthesis in yeast but also showed that some unknown ester-producing mechanisms still exist.
U2 - 10.3389/fmicb.2018.03202
DO - 10.3389/fmicb.2018.03202
M3 - Article
VL - 9
JO - Frontiers in Microbiology
T2 - Frontiers in Microbiology
JF - Frontiers in Microbiology
SN - 1664-302X
M1 - 3202
ER -