Cloning and nucleotide sequence of an esterase gene from Pseudomonas fluorescens and expression of the gene in Escherichia coli.
A gene coding for a novel esterase of Pseudomonas fluorescens was cloned in this study. DNA sequencing showed that the open reading frame is comprised of 708 nucleotides. The coding sequence of the gene is preceded by a potential Shine-Dalgarno sequence and by a promoter-like structure. Following the stop codon a structure reminiscent of the E. coli rho-independent terminator is present. The enzyme expressed in an E. coli clone was mostly in the periplasmic space, released to the outside of the cell by osmotic shock and purified to homogeneity by QAE-Sephadex A-50 and DEAE-Sepharose columns. The native form of the enzyme consisted of two identical subunits, each with a molecular weight of 27,000. By studying the properties and substrate specificity, the enzyme was classified as an arylesterase (EC 3.1.1.2).
Department of Biological Science and Engineering, Korea Advanced Institute of Science, Seoul.
K D
KD
Choi
G H
GH
Jeohn
J S
JS
Rhee
O J
OJ
Yoo
D000595:Amino Acid Sequence; D001483:Base Sequence; D002265:Carboxylic Ester Hydrolases / Q000096:biosynthesis / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics*; D004950:Esterases / Q000096:biosynthesis / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D015870:Gene Expression; D008969:Molecular Sequence Data; D008970:Molecular Weight; D011551:Pseudomonas fluorescens / Q000201:enzymology / Q000235:genetics*; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D013379:Substrate Specificity
D011994:Recombinant Proteins; D004247:DNA; D004950:Esterases; D002265:Carboxylic Ester Hydrolases; C019734:arylesterase