Advances in metabolic engineering for enhanced acetyl-CoA availability in yeast

Area of Science:

• Biochemistry
• Metabolic Engineering
• Synthetic Biology

Background:

• Acetyl-CoA (coenzyme A) is a crucial intermediate metabolite in central cellular metabolism.
• It serves as a precursor for synthesizing valuable commercial products like terpenoids, fatty acids, and polyketides.
• Microbial cell factories, particularly using *Saccharomyces cerevisiae* and *Yarrowia lipolytica*, are engineered for efficient acetyl-CoA and derivative synthesis.

Purpose of the Study:

• To review recent advancements in biosynthetic pathways for acetyl-CoA and its derivatives in yeast.
• To summarize metabolic engineering strategies for channeling acetyl-CoA toward desired products.
• To highlight future directions for improving microbial cell factories for bio-manufacturing.

Main Methods:

• Outlining metabolic routes for acetyl-CoA and derivative biosynthesis.
• Summarizing metabolic engineering strategies including enhancing organelle flux, refining precursor CoA synthesis, optimizing substrate utilization, and modifying protein acetylation.
• Reviewing advancements in yeast chassis like *Saccharomyces cerevisiae* and *Yarrowia lipolytica*.

Main Results:

• Detailed metabolic pathways for acetyl-CoA synthesis and derivative production in yeast were outlined.
• Effective metabolic engineering strategies were identified for redirecting acetyl-CoA flux.
• Key approaches include enhancing metabolic flux, optimizing precursor synthesis, and modifying protein acetylation.

Conclusions:

• Significant progress has been made in engineering yeast for acetyl-CoA and derivative production.
• Future research should focus on reducing CO2 emissions, dynamic pathway regulation, and understanding acetyl-CoA's role in protein acetylation.
• Optimized microbial cell factories hold promise for advanced bio-manufacturing.