Toward Rational Design of Precision-Fermented Milk Proteins: Integrating Cross-Species Selection, Post-Translational Modification, and AI Optimization.

Precision-fermented milk proteins as a model for industrial food biotechnology.

Dairy proteins are among the most nutritionally and functionally valuable proteins used in food, clinical nutrition, and infant nutrition, yet their supply remains structurally linked to livestock production and dairy processing streams. Precision fermentation offers, based on proven technology, a route to produce individual milk proteins independently of animal agriculture while preserving their molecular identity and application potential. Recent advances in host engineering, secretion capacity, and bioprocess optimization have moved recombinant milk proteins from proof-of-concept toward industrial relevance. However, not all milk proteins are equally tractable fermentation targets. In this opinion article, we examine β-lactoglobulin, α-lactalbumin, and caseins through the lens of nutritional value, functionality, manufacturing complexity, and commercial readiness. We argue that future success will depend less on sequence expression alone than on scalable biomanufacturing technology and know-how, post-translational fidelity, and application-driven target prioritization.

Microbial Production of Alternative Proteins for Food Applications: Advances, Industrial Challenges, and Regulatory Status.

The escalating global population and the environmentally inefficient nature of livestock-based protein production are intensifying demand for sustainable and scalable protein alternatives. Microbial biosynthesis, employing engineered cell factories, represents a pivotal strategy for producing functional proteins with a reduced ecological footprint. This review comprehensively examines the biosynthesis of alternative proteins (APs) via microbial precision fermentation, encompassing diverse categories including coloring proteins, flavoring and taste proteins, structuring and texturizing proteins, nutritional and functional proteins, food processing and enabling proteins, and special functional proteins. Enabling technologies, from fermentation feedstock and microbial host selection to genome/metabolic engineering, bioprocess optimization via response surface methodology/artificial neural networks, and downstream purification, are critically analyzed. Emerging strategies demonstrate substantial progress in enhancing microbial titers, achieving functional mimicry, and advancing regulatory readiness. However, persistent challenges include precise flavor replication, nutritional completeness, and food safety concerns such as allergenicity and process contaminants. Potential solutions, including advanced metabolic engineering, refined protein extraction, biocontainment strategies, and transparent regulatory frameworks, are discussed. By integrating technological innovation with targeted application mapping and regulatory foresight, this review outlines a roadmap toward scalable, safe, and functionally robust microbial AP platforms, thereby contributing to the transition toward a sustainable food system.

Tandem Repeat Gene Strategy for High-Yield Production and Functional Evaluation of Bioactive Wheat Oligopeptides.

Functional roles and nutritional potential of human milk oligosaccharides in swine gut health.

Human milk oligosaccharides (HMOs) are a prominent class of bioactive glycans recognized for their pivotal roles as prebiotics, anti-adhesive antimicrobials, and immunomodulators in neonatal development. While traditionally studied in the context of infant nutrition, scalable biotechnological production now allows for their evaluation in swine production to address the relatively lower structural complexity of the porcine milk glycome compared to humans. This review critically evaluates the structural diversity and biosynthesis of HMOs, detailing how specific fucosylated and sialylated structures modulate the porcine gut microbiome and reinforce intestinal barrier integrity. We synthesize current evidence regarding the metabolic fate of these glycans in the piglet and address the translational relevance of using swine as high-fidelity models for human gastrointestinal physiology. Furthermore, the review identifies critical knowledge gaps, specifically the lack of large-scale longitudinal studies and comprehensive cost-benefit analyses required to validate the economic feasibility of HMOs in commercial agriculture. By consolidating these mechanistic insights within the context of global efforts to reduce reliance on antibiotic growth promoters, this work underscores the potential of HMOs as precision nutritional tools to enhance resilience and productivity in sustainable animal production systems.

Wheat germ protein in functional foods: structure, processing, applications, and mechanistic insights.

As a sustainable plant protein resource, wheat germ protein (WGP) has attracted increasing attention because of its high digestibility, balanced essential amino acid profile, and broad potential in functional food development. However, its industrial application remains limited by processing bottlenecks and an incomplete understanding of its structure-function relationships and molecular mechanisms of action. This review systematically summarizes the structural characteristics, digestion behavior, and functional properties of WGP, and further evaluates its incorporation into diverse food matrices, particularly bakery products, meat analogues, and other functional formulations. In addition, current evidence on the physiological activities of WGP and its derived bioactive peptides is critically examined, with emphasis on antioxidant, antihypertensive, immunomodulatory, neuroprotective, and metabolic regulatory effects, together with the signaling pathways involved. Available studies indicate that WGP-derived peptides exert health-promoting effects not only through activation of key pathways such as Nrf2 and AMPK, but also through modulation of systemic homeostasis via the gut-brain and gut-liver axes. Overall, this review highlights the need to move beyond conventional nutritional fortification toward a mechanism-oriented design strategy, and provides a theoretical basis for the development of next-generation functional foods and specialized medical nutrition products based on WGP.

Graduate Student Literature Review: Methodologies and tools for synthetic biology for the production of next-generation dairy foods.

Synthetic biology has played a foundational role in the dairy industry for decades, with continued advancements improving the efficiency, precision, and scalability of producing recombinant dairy foods and additives. As global demand shifts, the industry faces growing pressure to deliver products that are nutritionally optimized, sustainable, cost-effective, and broadly accessible. At the same time, numerous value-added dairy components, such as bioactive proteins and functional metabolites, remain underleveraged despite their biological and commercial potential. Synthetic biology offers a platform to industrialize these products. This review examines approaches in protein engineering, genetic modification, and heterologous expression of high-value dairy products in non-native organisms. Overall, this work provides researchers and industry stakeholders with a technological framework to accelerate the integration of synthetic biology into next-generation dairy food development.