LYS2 gene and its mutation in Kluyveromyces lactis.
The KlLYS2 gene, encoding the alpha-aminoadipate reductase of Kluyveromyces lactis, was isolated by complementation of a lysA1 mutant. The deduced amino acid sequence shared an identity of 73% with the LYS2 product of Saccharomyces cerevisiae. Despite the high sequence homology of the alpha-aminoadipate reductase genes, the two yeast species differently responded to the presence of alpha-aminoadipate in the medium. Wild-type S. cerevisiae is known to be sensitive to alpha-aminoadipate, but becomes resistant when mutated to lys2. In contrast, K. lactis strains were found to be naturally resistant to alpha-aminoadipate. Therefore, the positive selection procedure for the isolation of lys2 mutants on alpha-aminoadipate, as practised in S. cerevisiae, cannot be applied to K. lactis. A possible reason of this difference may be that the catalytic rate of the alpha-aminoadipate reductase differs in the two yeasts. The EMBL/Genbank Accession No. for the KlLYS2 gene is AJ504405.
Dipartimento di Genetica Antropologia Evoluzione, University of Parma, Italy.
Adriana
A
Alberti
Iliana
I
Ferrero
Tiziana
T
Lodi
D015074:2-Aminoadipic Acid / Q000378:metabolism*; D000445:Aldehyde Oxidoreductases / Q000235:genetics* / Q000378:metabolism; D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D007716:Kluyveromyces / Q000201:enzymology* / Q000235:genetics / Q000254:growth & development; D050647:L-Aminoadipate-Semialdehyde Dehydrogenase; D008969:Molecular Sequence Data; D016415:Sequence Alignment; D014170:Transformation, Genetic
D004271:DNA, Fungal; D015074:2-Aminoadipic Acid; D000445:Aldehyde Oxidoreductases; D050647:L-Aminoadipate-Semialdehyde Dehydrogenase