Reference: Karpel JE and Bisson LF (2006) Aquaporins in Saccharomyces cerevisiae wine yeast. FEMS Microbiol Lett 257(1):117-23

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Abstract


AQY1 and AQY2 were sequenced from five commercial and five native wine yeasts. Of these, two AQY1 alleles from UCD 522 and UCD 932 were identified that encoded three or four amino-acid changes, respectively, compared with the Sigma1278b sequence. Oocytes expressing these AQY1 alleles individually exhibited increased water permeability vs. water-injected oocytes, whereas oocytes expressing the AQY2 allele from UCD 932 did not show an increase, as expected, owing to an 11 bp deletion. Wine strains lacking Aqy1p did not show a decrease in spore fitness or enological aptitude under stressful conditions, limited nitrogen, or increased temperature. The exact role of aquaporins in wine yeasts remains unclear.

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Journal Article | Research Support, Non-U.S. Gov't
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Karpel JE, Bisson LF
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