Cloning, sequence analysis, and expression of a gene encoding Chromobacterium sp. DS-1 cholesterol oxidase

Chromobacterium sp. strain DS-1 produces an extracellular cholesterol oxidase that is very stable at high temperatures and in the presence of organic solvents and detergents. In this study, we cloned and sequenced the structural gene encoding the cholesterol oxidase. The primary translation product...

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Veröffentlicht in:Applied microbiology and biotechnology 2009-03, Vol.82 (3), p.479-490
Hauptverfasser: Doukyu, Noriyuki, Shibata, Kanpei, Ogino, Hiroyasu, Sagermann, Martin
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Shibata, Kanpei
Ogino, Hiroyasu
Sagermann, Martin
description Chromobacterium sp. strain DS-1 produces an extracellular cholesterol oxidase that is very stable at high temperatures and in the presence of organic solvents and detergents. In this study, we cloned and sequenced the structural gene encoding the cholesterol oxidase. The primary translation product was predicted to be 584 amino acid residues. The mature product is composed of 540 amino acid residues. The amino acid sequence of the product showed significant similarity (53-62%) to the cholesterol oxidases from Burkholderia spp. and Pseudomonas aeruginosa. The DNA fragment corresponding to the mature enzyme was subcloned in the pET-21d(+) expression vector and expressed as an active product in Escherichia coli. The cholesterol oxidase produced from the recombinant E. coli was purified to homogeneity. The physicochemical properties were similar to those of native enzyme purified from strain DS-1. K m and V max values of the cholesterol oxidase were estimated from Lineweaver-Burk plots. The V max/K m ratio of the enzyme was higher than those of commercially available cholesterol oxidases. The circular dichroism spectral analysis of the recombinant DS-1 enzyme and Burkholderia cepacia ST-200 cholesterol oxidase showed that the conformational stability of the DS-1 enzyme was higher than that of B. cepacia ST-200 enzyme at higher temperatures.
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The DNA fragment corresponding to the mature enzyme was subcloned in the pET-21d(+) expression vector and expressed as an active product in Escherichia coli. The cholesterol oxidase produced from the recombinant E. coli was purified to homogeneity. The physicochemical properties were similar to those of native enzyme purified from strain DS-1. K m and V max values of the cholesterol oxidase were estimated from Lineweaver-Burk plots. The V max/K m ratio of the enzyme was higher than those of commercially available cholesterol oxidases. 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DS-1 cholesterol oxidase</title><title>Applied microbiology and biotechnology</title><addtitle>Appl Microbiol Biotechnol</addtitle><addtitle>Appl Microbiol Biotechnol</addtitle><description>Chromobacterium sp. strain DS-1 produces an extracellular cholesterol oxidase that is very stable at high temperatures and in the presence of organic solvents and detergents. In this study, we cloned and sequenced the structural gene encoding the cholesterol oxidase. The primary translation product was predicted to be 584 amino acid residues. The mature product is composed of 540 amino acid residues. The amino acid sequence of the product showed significant similarity (53-62%) to the cholesterol oxidases from Burkholderia spp. and Pseudomonas aeruginosa. The DNA fragment corresponding to the mature enzyme was subcloned in the pET-21d(+) expression vector and expressed as an active product in Escherichia coli. The cholesterol oxidase produced from the recombinant E. coli was purified to homogeneity. 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DS-1 cholesterol oxidase</atitle><jtitle>Applied microbiology and biotechnology</jtitle><stitle>Appl Microbiol Biotechnol</stitle><addtitle>Appl Microbiol Biotechnol</addtitle><date>2009-03-01</date><risdate>2009</risdate><volume>82</volume><issue>3</issue><spage>479</spage><epage>490</epage><pages>479-490</pages><issn>0175-7598</issn><eissn>1432-0614</eissn><coden>AMBIDG</coden><abstract>Chromobacterium sp. strain DS-1 produces an extracellular cholesterol oxidase that is very stable at high temperatures and in the presence of organic solvents and detergents. In this study, we cloned and sequenced the structural gene encoding the cholesterol oxidase. The primary translation product was predicted to be 584 amino acid residues. The mature product is composed of 540 amino acid residues. The amino acid sequence of the product showed significant similarity (53-62%) to the cholesterol oxidases from Burkholderia spp. and Pseudomonas aeruginosa. The DNA fragment corresponding to the mature enzyme was subcloned in the pET-21d(+) expression vector and expressed as an active product in Escherichia coli. The cholesterol oxidase produced from the recombinant E. coli was purified to homogeneity. The physicochemical properties were similar to those of native enzyme purified from strain DS-1. K m and V max values of the cholesterol oxidase were estimated from Lineweaver-Burk plots. The V max/K m ratio of the enzyme was higher than those of commercially available cholesterol oxidases. The circular dichroism spectral analysis of the recombinant DS-1 enzyme and Burkholderia cepacia ST-200 cholesterol oxidase showed that the conformational stability of the DS-1 enzyme was higher than that of B. cepacia ST-200 enzyme at higher temperatures.</abstract><cop>Berlin/Heidelberg</cop><pub>Berlin/Heidelberg : Springer-Verlag</pub><pmid>19015844</pmid><doi>10.1007/s00253-008-1775-9</doi><tpages>12</tpages></addata></record>
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subjects Amino Acid Sequence
Amino acids
Bacterial Proteins - chemistry
Bacterial Proteins - genetics
Bacterial Proteins - isolation & purification
Bacterial Proteins - metabolism
Base Sequence
Biological and medical sciences
Biotechnologically Relevant Enzymes and Proteins
Biotechnology
Burkholderia cepacia
Chemicals
Cholesterol
Cholesterol oxidase
Cholesterol Oxidase - chemistry
Cholesterol Oxidase - genetics
Cholesterol Oxidase - isolation & purification
Cholesterol Oxidase - metabolism
Chromobacterium
Chromobacterium - chemistry
Chromobacterium - enzymology
Chromobacterium - genetics
Cloning
Cloning, Molecular
Detergent
Detergents
E coli
Enzyme Stability
Enzymes
Escherichia coli
Escherichia coli - genetics
Escherichia coli - metabolism
Fundamental and applied biological sciences. Psychology
Gene Expression
Genetic research
High temperature
Kinetics
Laboratories
Life Sciences
Microbial Genetics and Genomics
Microbiology
Molecular Sequence Data
Molecular Weight
Organic solvent
Organic solvents
Peptides
Physicochemical properties
Pseudomonas aeruginosa
Sequence Analysis
Sodium
Solvents
Spectral analysis
Studies
thermal stability
title Cloning, sequence analysis, and expression of a gene encoding Chromobacterium sp. DS-1 cholesterol oxidase
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