Gene cloning and overexpression of two conjugated polyketone reductases, novel aldo-keto reductase family enzymes, of Candida parapsilosis.
The genes encoding two conjugated polyketone reductases (CPR-C1, CPR-C2) of Candida parapsilosis IFO 0708 were cloned and sequenced. The genes encoded a total of 304 and 307 amino acid residues for CPR-C1 and CPR-C2, respectively. The deduced amino acid sequences of the two enzymes showed high similarity to each other and to several proteins of the aldo-keto reductase (AKR) superfamily. However, several amino acid residues in putative active sites of AKRs were not conserved in CPR-C1 and CPR-C2. The two CPR genes were overexpressed in Escherichia coli. The E. coli transformant bearing the CPR-C2 gene almost stoichiometrically reduced 30 mg ketopantoyl lactone/ml to D-pantoyl lactone.
Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, 606-8502 Kyoto, Japan. kataoka@kais.kyoto-u.ac.jp
M
M
Kataoka
A-R G
AR
Delacruz-Hidalgo
M A
MA
Akond
E
E
Sakuradani
K
K
Kita
S
S
Shimizu
D015107:4-Butyrolactone / Q000031:analogs & derivatives* / Q000378:metabolism; D000429:Alcohol Oxidoreductases / Q000096:biosynthesis* / Q000235:genetics*; D000449:Aldehyde Reductase; D000074408:Aldo-Keto Reductases; D000595:Amino Acid Sequence; D001483:Base Sequence; D002175:Candida / Q000201:enzymology* / Q000235:genetics*; D003001:Cloning, Molecular; D017124:Conserved Sequence; D004271:DNA, Fungal / Q000737:chemistry / Q000302:isolation & purification; D004795:Enzyme Stability; D004926:Escherichia coli / Q000235:genetics / Q000502:physiology; D015870:Gene Expression; D005800:Genes, Fungal; D006863:Hydrogen-Ion Concentration; D008969:Molecular Sequence Data; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D017422:Sequence Analysis, DNA; D020539:Sequence Analysis, Protein; D017386:Sequence Homology, Amino Acid; D014169:Transformation, Bacterial
D004271:DNA, Fungal; D011994:Recombinant Proteins; C008232:keto-pantoyllactone; C005412:pantolactone; D000429:Alcohol Oxidoreductases; D000074408:Aldo-Keto Reductases; D000449:Aldehyde Reductase; D015107:4-Butyrolactone