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Related Concept Videos

Carbohydrate Digestion00:57

Carbohydrate Digestion

Carbohydrate digestion and metabolism break down simple and complex carbohydrates from food into saccharides (i.e., sugars) for the body to use as energy. Carbohydrate digestion starts in the mouth during mastication, or chewing. The masticated carbohydrates remain intact in the stomach. Digestion resumes in the duodenum of the small intestine, where pancreatic alpha-amylase and brush border enzymes of the microvilli convert complex carbohydrates to monosaccharides. Finally, the monosaccharides...
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Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...
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Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
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Accessory Organs01:31

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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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Related Experiment Video

Updated: May 14, 2026

Inhibition of Aspergillus flavus Growth and Aflatoxin Production in Transgenic Maize Expressing the &#945;-amylase Inhibitor from Lablab purpureus L.
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α-Amylase: Its Structure, Molecular Modification, and Application in the Food Field.

Gang Liu1, Manuel Montalbán-López2, Dehua Wei1

  • 1Anhui Fermented Food Engineering Research Center, Key Laboratory for Agricultural Products Processing of Anhui Province, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China.

Foods (Basel, Switzerland)
|May 13, 2026
PubMed
Summary

This review explores engineered alpha-amylases (GH13 family) for food processing. Protein engineering and nanomaterial immobilization enhance enzyme performance for baking, brewing, and sugar refining applications.

Keywords:
protein engineeringstructure determinationα-amylase

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Area of Science:

  • Biochemistry and Molecular Biology
  • Enzyme Engineering
  • Food Science and Technology

Background:

  • Alpha-amylase (GH13 family) is crucial in food processing.
  • Microbial sources offer cost-effective production via heterologous expression (e.g., Bacillus subtilis, Escherichia coli).
  • Extreme conditions (heat, acid) limit current enzyme applications.

Purpose of the Study:

  • To review structural features, catalytic mechanisms, and engineering of alpha-amylases.
  • To evaluate protein engineering strategies for enhanced enzyme properties.
  • To synthesize current applications and future directions for engineered alpha-amylases in food processing.

Main Methods:

  • Comprehensive literature review of structural biology, enzyme engineering, and material science.
  • Analysis of protein engineering techniques: directed evolution, semi-rational design.
  • Evaluation of immobilization methods using nanomaterials.

Main Results:

  • Engineered alpha-amylases exhibit improved thermostability, catalytic efficiency, and reusability.
  • Heterologous expression in hosts like Bacillus subtilis and Escherichia coli is cost-effective.
  • Advanced immobilization on nanomaterials further enhances enzyme performance.

Conclusions:

  • Protein engineering and nanomaterial science offer powerful tools to overcome limitations of alpha-amylases.
  • Engineered alpha-amylases have significant potential in baking, sugar refining, and brewing.
  • This review provides a roadmap for developing high-performance enzymes for sustainable food processing.