Abstract:
A method for producing an objective substance such as vanillin and vanillic acid is provided. An objective substance is produced from a carbon source or a precursor of the objective substance by using a microorganism that is able to produce the objective substance, which microorganism has been modified so that the activity of an enzyme involved in SAM cycle (SAM cycle enzyme) is increased.
Abstract:
Disclosed are the ADE3, ADE4, ADE5, 7, ADE6, ADE8, ADE12, and ADE13 genes encoding various enzymes in the adenine biosynthesis pathway of Pichia pastoris. The loci in the Pichia pastoris genome encoding these enzymes are useful sites for stable integration of heterologous nucleic acid molecules into the Pichia pastoris genome. The genes or gene fragments encoding the particular enzymes, which may be used as selection markers for constructing recombinant Pichia pastoris.