Vitamin A as an essential nutrient: advances in biosynthesis

Area of Science:

• Biotechnology and Metabolic Engineering
• Microbial Production Systems
• Vitamin A Synthesis

Background:

• Vitamin A (retinoids) are vital for vision, immunity, and cell differentiation.
• Chemical synthesis of retinoids faces sustainability challenges.
• Microbial biosynthesis presents an eco-friendly alternative for retinoid production.

Purpose of the Study:

• To review recent advances in metabolic engineering for microbial retinoid production.
• To highlight strategies for enhancing the biosynthesis of beta-carotene, retinol, retinal, retinoic acid, and retinyl esters.
• To discuss future directions for industrial-scale microbial retinoid manufacturing.

Main Methods:

• Metabolic engineering of microbial cell factories.
• Enhancement of precursor supply pathways.
• Engineering of key enzymes (e.g., beta-carotene oxygenase, dehydrogenases, acyltransferase).
• Cofactor and transporter engineering.
• Optimization of cultivation strategies to mitigate oxidative instability.

Main Results:

• Successful engineering of microbial platforms for increased production of various retinoids.
• Identification and modification of critical enzymes involved in the vitamin A biosynthetic pathway.
• Development of cultivation methods to improve yield and stability of vitamin A.
• Demonstrated potential for sustainable, large-scale retinoid manufacturing via microbial routes.

Conclusions:

• Metabolic engineering has significantly advanced microbial production of vitamin A and its derivatives.
• Optimized microbial cell factories offer a sustainable and scalable alternative to chemical synthesis.
• Further research into metabolic engineering and bioprocess optimization is crucial for industrial implementation.