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Thermodynamic tools for more efficient biotechnological processes: an example in poly-(3-hydroxybutyrate) production from carbon monoxide
Summary
This study demonstrates how thermodynamic tools — including metabolic network analysis and feasibility assessments — can optimize the biotechnological production of poly-(3-hydroxybutyrate) (PHB), a biodegradable bioplastic, from carbon monoxide. The authors show these frameworks help identify yield limits, metabolic bottlenecks, and genetic engineering targets applicable across diverse bioproduction systems.
Modern biotechnology requires the integration of several disciplines, with thermodynamics being a crucial one. Experimental approaches frequently used in biotechnology, such as rewiring of metabolic networks or culturing of micro-organisms in engineered environments, can benefit from the application of thermodynamic tools. In this paper, we provide an overview of several thermodynamic tools that are useful for the design and optimization of biotechnological processes, and we demonstrate their potential application in the production of poly-(3-hydroxybutyrate) (PHB) from carbon monoxide (CO). We discuss how these tools can aid in the design of metabolic engineering strategies, the calculation of expected yields, the assessment of the thermodynamic feasibility of the targeted conversions, the identification of potential thermodynamic bottlenecks, and the selection of genetic engineering targets. Although we illustrate these tools using the specific example of PHB production from CO, they can be applied to other substrates and products.