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Related Concept Videos

Protein Denaturation01:28

Protein Denaturation

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The function of proteins depends on their native three-dimensional structure, which is dictated by the amino acid sequence of the specific protein. Folding of the polypeptide chain takes place under specific conditions that energetically favor the folded conformation. In contrast, protein denaturation occurs spontaneously under unfavorable conditions that disrupt the integrity of the folded conformation. Thus, the chemical and physical environment of a protein, such as significant changes in pH...
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Protein Folding01:25

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Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
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Protein Organization01:24

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Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
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Protein and Protein Structure02:15

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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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Molecular Chaperones and Protein Folding03:00

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The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Processing Effects on Protein Structure and Physicochemical Properties.

Vibeke Orlien1, Åsmund Rinnan1

  • 1Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg, Denmark.

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All raw materials from plant or animal sources require processing before human consumption. This processing can occur domestically or industrially, ensuring safety and usability.

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Area of Science:

  • Food Science
  • Agricultural Science
  • Biotechnology

Background:

  • Raw materials from animal and plant sources are fundamental to the human diet.
  • Processing is a critical step transforming raw agricultural products into consumable goods.
  • Understanding these transformations is key to food security and safety.

Discussion:

  • Industrial and domestic processing methods vary significantly in scale and technology.
  • Processing impacts nutritional content, shelf-life, and safety of food products.
  • The choice of processing impacts the environmental footprint and economic viability of food systems.

Key Insights:

  • Processing is essential for making diverse raw materials safe and palatable for consumption.
  • Both traditional and modern techniques are employed, each with unique advantages and challenges.
  • The transformation of raw materials is a cornerstone of global food supply chains.

Outlook:

  • Future research should focus on sustainable and efficient processing technologies.
  • Innovations in food processing can enhance nutritional value and reduce waste.
  • Continued study is vital for adapting to changing dietary needs and environmental conditions.