Crystal structure of hyperthermophilic esterase EstE1 and the relationship between its dimerization and thermostability properties
2007
Structure of EstE1: A Thermostable Esterase
publication
Evidence: high
Author Information
Author(s): Byun Jung-Sue, Rhee Jin-Kyu, Kim Nam Doo, Yoon JeongHyeok, Kim Dong-Uk, Koh Eunhee, Oh Jong-Won, Cho Hyun-Soo
Primary Institution: Yonsei University
Hypothesis
The study investigates the relationship between dimerization and thermostability of the hyperthermophilic esterase EstE1.
Conclusion
The study concludes that hydrophobic interactions are essential for the hyperthermostability of EstE1.
Supporting Evidence
- EstE1 exhibits a classic α/β hydrolase fold with a central parallel-stranded beta sheet.
- The catalytic triad of EstE1 consists of Ser154, Asp251, and His281.
- Dimerization of EstE1 is primarily mediated by hydrophobic interactions.
- Mutations disrupting hydrophobic interactions significantly decrease EstE1's thermostability.
- EstE1 retains high activity even after prolonged exposure to high temperatures.
Takeaway
EstE1 is a special enzyme that can work at very high temperatures, and it stays stable because its parts stick together really well.
Methodology
The crystal structure of EstE1 was determined using single wavelength anomalous dispersion (SAD) method.
Digital Object Identifier (DOI)
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