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Growth-based Determination and Biochemical Confirmation of Genetic Requirements for Protein Degradation in Saccharomyces cerevisiae

Growth-based Determination and Biochemical Confirmation of Genetic Requirements for Protein Degradation in Saccharomyces cerevisiae

Published on: February 16, 2015

Identifiability study of the proteins degradation model, based on ADM1, using simultaneous batch experiments.

X Flotats¹, J Palatsi, B K Ahring

¹Laboratory of Environmental Engineering, Centre UdL-IRTA, University of Lieida, Spain. xavier.flotats@irta.es

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|October 14, 2006

Summary

Volatile fatty acids (VFAs) do not inhibit gelatin anaerobic degradation. Hydrolysis is the rate-limiting step, with the ADM1 model accurately describing the process kinetics.

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Assays for the Degradation of Misfolded Proteins in Cells

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Published on: August 28, 2016

Area of Science:

Biochemistry
Environmental Microbiology
Chemical Engineering

Background:

Gelatin anaerobic degradation is crucial for organic waste treatment.
Understanding kinetic and stoichiometric parameters is essential for process optimization.
Volatile fatty acids (VFAs) are key intermediates in anaerobic digestion.

Purpose of the Study:

To analyze kinetic and stoichiometric parameters of gelatin anaerobic degradation at thermophilic temperatures.
To investigate whether volatile fatty acids (VFAs) inhibit the hydrolysis process.
To validate the applicability of the Anaerobic Digestion Model No. 1 (ADM1).

Main Methods:

Experimental design to assess VFA inhibition during gelatin hydrolysis.
Application of the ADM1 model to simulate hydrolysis and acidogenesis.
Estimation of yield coefficients using VFA profiles from batch experiments.
Identification studies involving simultaneous measurement of amino acid evolution.

Main Results:

Volatile fatty acids (VFAs) were found not to inhibit the hydrolysis of gelatin.
The ADM1 model accurately described the hydrolysis and acidogenesis steps.
Hydrolysis was identified as the rate-limiting step in the anaerobic degradation process.
Kinetic parameters indicated fast acidogenesis and slower hydrolysis rates.

Conclusions:

The study confirms that VFAs do not impede gelatin hydrolysis in thermophilic anaerobic digestion.
The ADM1 model provides a reliable framework for modeling this process.
Hydrolysis rate is critical for overall anaerobic degradation efficiency.
Accurate kinetic parameter determination for protein degradation is feasible with specific experimental conditions.