title: Cloning and expression of a novel lipase gene from Bacillus sphaericus 205y.
abstract: A Bacillus sphaericus strain (205y) that produces an organic solvent-tolerant lipase was isolated in Port Dickson, Malaysia. The gene for the lipase was recovered from a genomic library and sequenced. Phylogenetic analysis was performed based on an alignment of thirteen microbial lipase sequences obtained from the NCBI database. The analysis suggested that the B. sphaericus lipase gene is a novel gene, as it is distinct from other lipase genes in Families I.4 and I.5 reported so far. Expression in Escherichia coli under the control of the lacZ promoter resulted in an eight-fold increase in enzyme activity after a 3-h induction with 1 mM IPTG. The crude enzyme thus obtained showed a slight (10%) enhancement in activity after a 30-min incubation in 25% (v/v) n-hexane at 37 degrees C, and retained 90% of its activity after a similar period in 25% (v/v) p-xylene.
authors.affiliation: Department of Biochemistry and Microbiology, Enzyme and Microbial Technology Research, Faculty of Science and Environmental Studies, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia. rnzaliha@fsas.upm.edu.my
authors.forename: R N Z A
authors.initials: RN
authors.lastname: Rahman
authors.forename: J H
authors.initials: JH
authors.lastname: Chin
authors.forename: A B
authors.initials: AB
authors.lastname: Salleh
authors.forename: M
authors.initials: M
authors.lastname: Basri
mesh_terms: D000595:Amino Acid Sequence; D001407:Bacillus / Q000201:enzymology* / Q000235:genetics*; D001483:Base Sequence; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D004247:DNA / Q000378:metabolism; D004262:DNA Restriction Enzymes / Q000378:metabolism; D019992:Databases as Topic; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000378:metabolism; D015723:Gene Library; D007763:Lac Operon; D008049:Lipase / Q000737:chemistry / Q000235:genetics; D008957:Models, Genetic; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D010802:Phylogeny; D010957:Plasmids / Q000378:metabolism; D011401:Promoter Regions, Genetic; D021382:Protein Sorting Signals; D017386:Sequence Homology, Amino Acid; D013997:Time Factors
chemical_list: D021382:Protein Sorting Signals; D004247:DNA; D008049:Lipase; D004262:DNA Restriction Enzymes