Pectin methylesterase gene (pmeA) from Aspergillus oryzae KBN616: its sequence analysis and overexpression, and characterization of the gene product.
A gene (pmeA) encoding pectin methylesterase was isolated from a shoyu koji mold, Aspergillus oryzae KBN616, and characterized. The structural gene comprised 1,370 bp with six introns. The PMEA protein consisted of 331 amino acids with a putative signal peptide of 17 amino acids. The deduced amino acid sequence was very similar to those of Aspergillus niger PMEA and Aspergillus aculeatus PME1. The pmeA gene was efficiently expressed under control of the A. oryzae TEF1 gene promoter for purification and characterization of the ezymatic properties. PMEA had a molecular mass of 38.5 kDa, a pH optimum of 5.0, and a temperature optimum of 55 degrees C.
Food Research Institute, Aichi Prefectural Government, Nagoya, Japan.
N
N
Kitamoto
H
H
Okada
S
S
Yoshino
K
K
Ohmiya
N
N
Tsukagoshi
D000595:Amino Acid Sequence; D001236:Aspergillus oryzae / Q000201:enzymology* / Q000235:genetics*; D001483:Base Sequence; D002265:Carboxylic Ester Hydrolases / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D017931:DNA Primers / Q000235:genetics; D004271:DNA, Fungal / Q000235:genetics; D015870:Gene Expression; D005800:Genes, Fungal; D006863:Hydrogen-Ion Concentration; D008969:Molecular Sequence Data; D008970:Molecular Weight; D011401:Promoter Regions, Genetic; D017386:Sequence Homology, Amino Acid; D013696:Temperature
D017931:DNA Primers; D004271:DNA, Fungal; D002265:Carboxylic Ester Hydrolases; C022323:pectinesterase