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Genome-wide cloning and characterization of microbial esterases
Hyeon-Su Ro1, Hyung Pyo Hong, Byung Hoon Kho
1Laboratory of Integrative Biotechnology, Korea Research Institute of Bioscience and Biotechnology, P.O. BOX 115, Yuseong-gu, Daejeon 305-600, South Korea.
FEMS Microbiology Letters
|March 27, 2004
Summary
Researchers identified nine novel bacterial esterase genes with significant hydrolyzing activity. Several enzymes demonstrated high alkaline pH activity and thermostability, offering potential for industrial applications.
Area of Science:
- Biochemistry
- Molecular Biology
- Enzymology
Background:
- Esterases are crucial enzymes involved in various biological processes.
- Exploring microbial genomes can reveal novel enzymes with unique properties.
Purpose of the Study:
- To identify and characterize novel esterase enzymes from bacterial genomes.
- To evaluate the activity and stability of these enzymes under different conditions.
Main Methods:
- Selection of 30 putative esterase genes from 13 bacterial chromosomes.
- Cloning genes into an expression vector and testing hydrolyzing activity on tributyrin plates.
- Assessing enzyme activity at various pH and temperature conditions, including solution assays.
Main Results:
- Nine out of 30 clones exhibited significant tributyrin hydrolyzing activity.
- Specific esterases (S5, S12, S28) showed high activity in alkaline pH ranges.
- Esterases S5, S12, S21, and S28 displayed thermostability at 50°C.
Conclusions:
- Genome-wide exploration is effective for discovering novel esterases.
- Identified esterases possess desirable characteristics for potential biotechnological applications.
- Biochemical differences among esterases from various sources were revealed.