Malic Acid Production in Recombinant Yeast
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United States of America Patent
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Issued Date -
Apr 17, 2008
app pub date -
Oct 31, 2006
filing date -
Nov 21, 2005
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Abandoned
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Abstract
We disclose a recombinant yeast, wherein the yeast is pyruvate decarboxylase enzyme (PDC) activity negative (PDC-negative) and is functionally transformed with a coding region encoding a pyruvate carboxylase enzyme (PYC) wherein the PYC is active in the cytosol, a coding region encoding a malate dehydrogenase enzyme (MDH) wherein the MDH is active in the cytosol and is not inactivated in the presence of glucose, and a coding region encoding a malic acid transporter protein (MAE). We also disclose a method of producing malic acid by culturing such a yeast in a medium comprising a carbon source and a carbon dioxide source and isolating malic acid from the medium.
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