How acetaldehyde deactivates microbial lipases
Author Information
Author(s): Benjamin Franken, Thorsten Eggert, Karl E Jaeger, Martina Pohl
Primary Institution: Heinrich-Heine University Düsseldorf
Hypothesis
The sensitivity of microbial lipases toward acetaldehyde depends on the protonation state of lysine ε-amino groups.
Conclusion
Acetaldehyde-induced inactivation of microbial lipases can be avoided by adjusting the protonation state of the enzymes.
Supporting Evidence
- The protonation state of lysine ε-amino groups significantly impacts lipase sensitivity to acetaldehyde.
- Different lipases exhibit varying degrees of sensitivity to acetaldehyde based on their purification procedures.
- Lyophilization at pH 6 can stabilize lipases against acetaldehyde-induced inactivation.
Takeaway
This study shows that acetaldehyde can make certain enzymes less effective, but we can prevent this by changing the environment around the enzymes.
Methodology
The study involved lyophilizing lipases from different microbial sources and treating them with acetaldehyde to assess their activity.
Limitations
The study primarily focuses on specific lipases and may not generalize to all microbial lipases.
Digital Object Identifier (DOI)
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