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Cloning and sequence analysis of cDNA encoding Rhizopus niveus lipase
1Central Research Institute, Fuji Oil Co., Ltd., Ibaraki, Japan.
Bioscience, Biotechnology, and Biochemistry
|May 1, 1992
Summary
Complementary DNA for Rhizopus niveus lipase (RNL) was isolated and expressed in E. coli. This research provides insights into RNL
Area of Science:
- Biochemistry
- Molecular Biology
- Enzymology
Background:
- Lipases are crucial enzymes in various industrial applications.
- Understanding lipase structure and function is key to optimizing their use.
- Rhizopus niveus lipase (RNL) is a potential candidate for biotechnological applications.
Purpose of the Study:
- To isolate and characterize the complementary DNA (cDNA) encoding Rhizopus niveus lipase (RNL).
- To express the RNL gene in a heterologous host for functional analysis.
- To analyze the molecular properties and sequence homology of RNL.
Main Methods:
- cDNA library screening using synthetic oligonucleotides.
- Gene cloning and sequencing.
- Heterologous expression in Escherichia coli (E. coli) as a lacZ fusion protein.
- Molecular mass determination and sequence homology analysis.
Main Results:
- Isolation of a 1.0 kilobase pair cDNA clone containing the RNL coding region.
- Expression of mature RNL comprising 297 amino acid residues and a molecular mass of 32 kDa.
- Significant sequence homology of RNL to Rhizomucor miehei lipase, with conserved active site residues.
Conclusions:
- The successful isolation and expression of RNL provide a foundation for further studies.
- The conserved active site suggests similar catalytic mechanisms between RNL and related lipases.
- RNL's characteristics make it a promising enzyme for biotechnological applications.