Engineering of Microbial Factories for the Production of Useful Compounds

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Microbial Biotechnology".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 808

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Guest Editor
Department of Chemical Engineering, Feng Chia University, 100 Wenhwa Road, Taichung 40724, Taiwan
Interests: metabolic engineering; recombinant protein production; microbial fermentation; bio-based chemicals production; biofuel production
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Department of Medical Laboratory Science and Biotechnology, China Medical University, 91, Hsueh-Shih Rd., Taichung 40402, Taiwan
Interests: synthetic biology; recombinant protein production; smart microbe design; enzyme engineering; bioprocess engineering; chemicals biosynthesis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

(1) Introduction

Microorganisms have long been central in biotechnology. The advances in metabolic engineering, synthetic biology, omics, computational, and machine learning technologies have significantly engineered microbes with the ability to convert simple substrates into complex compounds of interest. Daily consumables mainly result from conventional chemical synthesis using fossil-based feedstocks, leading to hazardous waste and CO2 emissions. This issue has further increased the industrial interest in applying microbial cell factories to develop environment-friendly and sustainable production systems that synthesize valuable molecules, including pharmaceuticals, biofuels, chemicals, biodegradable materials, etc.

Despite these advances, the practical application of microbial production systems still encounters many challenges. Issues such as low product yields and productivity, metabolic burden, pathway complexity, strain instability, and inefficient scale-up must be addressed before the potential of microbial factories can be acknowledged. Therefore, it is scientifically compelling and industrially essential for the continued research and innovation in microbial engineering and bioprocess.

(2) Aim of the Special Issue

This Special Issue aims to provide a platform to compile the cutting-edge research and comprehensive reviews focusing on genetic modification and process engineering of microbial cell factories for the sustainable and efficient production of valuable compounds. Contributions that address fundamental insights and novel findings are welcome, with particular interest in studies that demonstrate helpful production strategies to overcome current technology bottlenecks.

Topics of interest include, but are not limited to:

Metabolic engineering to improve production yield and productivity

Genome editing technologies to reprogram microbes

Omics-based strategies for strain improvement

Exploration of novel microbial chassis

In silico design and AI-assisted design of microbial cell factories

Fermentation process development and scale-up

Prof. Dr. Yun-Peng Chao
Dr. Chung-Jen Chiang
Guest Editors

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Keywords

  • microbial factories
  • metabolic engineering
  • synthetic biology
  • sustainable bioprocess

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Published Papers (1 paper)

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Research

13 pages, 649 KB  
Article
Engineering of Escherichia coli for Co-Production of Lignocellulosic Ethanol and Poly(3-hydroxybutyrate)
by Nguyen Luan Luu, Yin-Zhou Liu, Doan Thanh Ta, Chung-Jen Chiang and Yun-Peng Chao
Microorganisms 2026, 14(3), 537; https://doi.org/10.3390/microorganisms14030537 - 26 Feb 2026
Viewed by 517
Abstract
Bioethanol is an alternative energy source to fossil fuels and can serve as a raw material for the production of sustainable aviation fuel. Poly(3-hydroxybutyrate) (PHB) is a biodegradable plastic with the potential to replace petrochemical plastics. Lignocellulose has a renewable and eco-friendly nature, [...] Read more.
Bioethanol is an alternative energy source to fossil fuels and can serve as a raw material for the production of sustainable aviation fuel. Poly(3-hydroxybutyrate) (PHB) is a biodegradable plastic with the potential to replace petrochemical plastics. Lignocellulose has a renewable and eco-friendly nature, and it is a key factor in determining the environmental impact of bioethanol and PHB. In this study, we addressed this issue by developing Escherichia coli for the co-production of bioethanol and PHB from rice straw hydrolysate (RSH). Metabolic evolution was employed to enhance ethanol tolerance in the ethanologenic E. coli strain. To mitigate the toxicity of RSH, the strain was modified by rewiring the pentose phosphate pathway and subsequently subjected to metabolic evolution. The strain was further reshaped by reprogramming xylose metabolism and recruiting the PHB synthesis pathway. As a result, the engineered strain simultaneously utilized glucose and xylose while producing 19.8 g/L of bioethanol and 3.5 g/L of PHB in 30 h. The bioethanol yield and the PHB content account for 0.40 g/g and 38% of dry cell weight, respectively. Overall, it indicates the potential application of this developed strain in lignocellulosic biorefineries. Full article
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