Cloning and expression of gene, and activation of an organic solvent-stable lipase from Pseudomonas aeruginosa LST-03.
Organic solvent-tolerant Pseudomonas aeruginosa LST-03 secretes an organic solvent-stable lipase, LST-03 lipase. The gene of the LST-03 lipase (Lip9) and the gene of the lipase-specific foldase (Lif9) were cloned and expressed in Escherichia coli. In the cloned 2.6 kbps DNA fragment, two open reading frames, Lip9 consisting of 933 nucleotides which encoded 311 amino acids and Lif9 consisting of 1,020 nucleotides which encoded 340 amino acids, were found. The overexpression of the lipase gene (lip9) was achieved when T7 promoter was used and the signal peptide of the lipase was deleted. The expressed amount of the lipase was greatly increased and overexpressed lipase formed inclusion body in E. coli cell. The collected inclusion body of the lipase from the cell was easily solubilized by urea and activated by using lipase-specific foldase of which 52 or 58 amino acids of N-terminal were deleted. Especially, the N-terminal methionine of the lipase of which the signal peptide was deleted was released in E. coli and the amino acid sequence was in agreement with that of the originally-produced lipase by P. aeruginosa LST-03. Furthermore, the overexpressed and solubilized lipase of which the signal peptide was deleted was more effectively activated by lipase-specific foldase.
Department of Chemical Engineering, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan. ogino@chemeng.osakafu-u.ac.jp
Hiroyasu
H
Ogino
Yoshikazu
Y
Katou
Rieko
R
Akagi
Takashi
T
Mimitsuka
Shinichi
S
Hiroshima
Yuichi
Y
Gemba
Noriyuki
N
Doukyu
Masahiro
M
Yasuda
Kosaku
K
Ishimi
Haruo
H
Ishikawa
D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D001483:Base Sequence; D003001:Cloning, Molecular; D004269:DNA, Bacterial; D004789:Enzyme Activation; D004795:Enzyme Stability; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism*; D002479:Inclusion Bodies / Q000201:enzymology; D008049:Lipase / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D021382:Protein Sorting Signals; D017434:Protein Structure, Tertiary; D011550:Pseudomonas aeruginosa / Q000201:enzymology* / Q000235:genetics; D011994:Recombinant Proteins / Q000378:metabolism; D017422:Sequence Analysis, DNA; D020539:Sequence Analysis, Protein; D012997:Solvents / Q000737:chemistry*; D014508:Urea / Q000737:chemistry
D001426:Bacterial Proteins; D004269:DNA, Bacterial; D021382:Protein Sorting Signals; D011994:Recombinant Proteins; D012997:Solvents; D014508:Urea; D008049:Lipase; C504169:lipase foldase