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Open research questions in Microbial Metabolic Engineering and Bioproduction

181 unresolved questions extracted from the limitations and future-work sections of 565 Microbial Metabolic Engineering and Bioproduction papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Collectively, Professor Ouyang had published over 300 papers, authored or translated more than 10 books, and applied for over 70 patents by 2015. Qualitatively, these outputs were instrumental in moving the Chinese bio- economy from conceptual stages to global competitiveness. Professor Ouyang’s work exemplifies how biotechnology-driven engineering can reconcile industrial development with planetary health. His contributions— spanning waste valorization, biodegradable materials, and institutional reform—provide a roadmap for achieving carbon neutrality and circular economies. As he aptly stated, “Innovation must stem from real-world problems, not merely following trends”. His vision continues to inspire policies and innovations aimed at building an ecologically civilized society.

    Commemorating Academician Ouyang Pingkai: A Pioneer in Sustainable Engineering and Industrial Biotechnology † · 2026 · DOI

  • The study only analyzed 80 public C. albicans genome assemblies, - The analysis was limited to a specific type of fungal infection, - The study did not investigate the clinical implications of the findings, - The pan-GEM's sensitivity was limited

    Pan-Genome-Scale Metabolic Reconstruction Reveals Conserved Metabolic Functions in Candida albicans · 2026 · DOI

  • Investigating the clinical implications of the findings, - Analyzing a larger dataset of C. albicans genome assemblies, - Examining the metabolic variation in other fungal species, - Developing new methods to improve the pan-GEM's sensitivity

    Pan-Genome-Scale Metabolic Reconstruction Reveals Conserved Metabolic Functions in Candida albicans · 2026 · DOI

  • Developing innovative solutions to achieve economically viable industrial-scale yields - Identifying and addressing bottlenecks in the production process - Further research on systems metabolic engineering and machine learning - Improving the understanding of molecular mechanisms and process engineering

    Engineering Kluyveromyces marxianus for efficient 2-phenylethanol production: from metabolic design to process innovation · 2026 · DOI

  • The trade-off between yield, productivity, and production intensity, - The inherent conflict between cellular growth and product synthesis, - The limited theoretical yield of converting exogenous L-Phe via the Ehrlich pathway.

    Engineering Kluyveromyces marxianus for efficient 2-phenylethanol production: from metabolic design to process innovation · 2026 · DOI

  • computation is reshaping discovery - genome mining and the targeted activation of silent biosynthetic gene clusters - the physiological dimension deserves renewed attention

    Feature Review Papers in Microbial Metabolism, Physiology & Genetics, 2nd Edition · 2026 · DOI

  • The yields and titres of desired metabolites are frequently limiting. The biosynthetic gene clusters responsible for many fungal metabolites remain silent or poorly characterised. The path from in vitro bioactivity to a standardised, clinically validated product is rarely straightforward.

    Feature Review Papers in Microbial Metabolism, Physiology & Genetics, 2nd Edition · 2026 · DOI

  • Cell inhibition by acetate. Low production titer and yield of valuable chemicals from acetate. The need for efficient metabolic engineering strategies to improve the production of chemicals from acetate.

    Application of Acetate as a Substrate for the Production of Value-Added Chemicals in Escherichia coli · 2024 · DOI

  • However, the quantitative relationship between these two modeling scales remains unclear.

    A Thermodynamic Framework Linking Black Box Growth models with Genome Scale Metabolite models · 2026 · DOI

  • Still, it remains unclear whether organism- and environment-specific factors shape their capacity to evolve in response to metabolic stress or whether it follows general principles.

    Species-specific metabolic networks shape evolutionary routes to functional rescue · 2026 · DOI

  • IMPORTANCE Amino acids are central to a metabolic economy and are extensively exchanged between cells; yet, the scale of this economy remains unknown even in model microbes.

    The quantitative amino acid economy of yeast reveals public versus private goods and guides syntrophic community design · 2026 · DOI

  • Abstract PA2125 from Pseudomonas aeruginosa PAO1 is annotated as an aldehyde dehydrogenase (ALDH), but its substrate specificity, catalytic properties, and phylogenetic family assignment had not been established.

    Kinetic, computational, and phylogenetic characterisation of PA2125 from Pseudomonas aeruginosa PAO1: a hydroxybenzaldehyde dehydrogenase of the newly defined ALDH33 family · 2026 · DOI

  • Microorganisms thrive in complex communities shaped by intricate interactions, yet the extent and ecological implications of biosynthetic dependencies in natural communities remain underexplored.

    Microbial model communities exhibit widespread metabolic interdependencies · 2025 · DOI

  • Eat1 is accountable for bulk ethyl acetate production in yeasts, yet its properties and molecular mechanism are not well characterized.

    Characterization and Mechanism Study of a Novel Ethanol Acetyltransferase from Hanseniaspora uvarum (EatH) with Good Thermostability, pH Stability, and Broad Alcohol Substrate Specificity · 2025 · DOI

  • Future research should focus on system-level design to enhance cost-effectiveness and sustainability, advancing industrial bio-manufacturing of organic acids.

    Advancements in metabolic engineering: unlocking the potential of key organic acids for sustainable industrial applications · 2025 · DOI

  • glutamicum, the role of medium composition, particularly trace elements, remains underexplored.

    Enabling and improving trans-nerolidol production by Corynebacterium glutamicum: combining metabolic engineering and trace elements medium refinement · 2025 · DOI

  • There exists a gap in understanding between microbiologists and modelers/bioinformaticians, stemming from a lack of interdisciplinary knowledge.

    Microbiome modeling: a beginner's guide · 2024 · DOI

  • However, the efficient synthesis of CA is usually limited by the resources of individual microbial platforms.

    Development of a co-culture system for green production of caffeic acid from sugarcane bagasse hydrolysate · 2024 · DOI

  • coli, the production titer and yield are insufficient for commercial applications.

    Application of Acetate as a Substrate for the Production of Value-Added Chemicals in Escherichia coli · 2024 · DOI

  • However, the scarcity of efficient genetic tools and the challenge of identifying crucial metabolic genes impede further research on C.

    Expanding the CRISPR Toolbox for Engineering Lycopene Biosynthesis in Corynebacterium glutamicum · 2024 · DOI

  • Limited knowledge about the metabolic networks of the species and limited tools for genetic engineering have led to a relatively small amount of research on the microbes.

    Genome-scale model development and genomic sequencing of the oleaginous clade Lipomyces · 2024 · DOI

  • The availability of matched quantitative proteomic and metabolomic data sets is limited. Labeling experiments necessitate substantial resources and efforts. The approach relies on the quality of the fluxomic and proteomic data.

    Accurate prediction of flux distributions compatible with metabolite concentration effects in genome-scale metabolic networks · 2026 · DOI

  • Further research is needed to improve the accuracy and applicability of KineFlux. The approach can be applied to different organisms and experimental conditions. Future research can focus on integrating KineFlux with other approaches to provide a more comprehensive understanding of intracellular fluxes.

    Accurate prediction of flux distributions compatible with metabolite concentration effects in genome-scale metabolic networks · 2026 · DOI

  • While the study proposes that Rhodococcus PyK may belong to cluster II type based on lysine residue presence, experimental biochemical validation of this classification and its potassium ion dependency characteristics is needed.

    Bioinformatics Analysis of Pyruvate Kinase of Rhodococcus Opacus · 2026 · DOI

  • The complexity and interconnectedness of living systems. The dynamic nature of metabolism. The lack of standardization and documentation of kinetic models.

    A standardized workflow for kinetic metabolic model curation and dissemination · 2026 · DOI

Most-cited papers in Microbial Metabolic Engineering and Bioproduction

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181 open questions have been extracted from the limitations and future-work passages of 565 Microbial Metabolic Engineering and Bioproduction papers in our 4.5M-paper local library. Each one below links back to the study that raised it, so you can read the original claim in context.

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