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Related Concept Videos

Collagens are the Major Structural Proteins of ECM01:13

Collagens are the Major Structural Proteins of ECM

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Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Collagen fiber is made from fibrous protein subunits linked together to form a long, straight fiber. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the body's movement.
Connective tissue proper includes loose...
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Type IV Collagen of Basal Lamina01:05

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Type IV collagen is a 400 nm long, network-forming collagen that acts as a barrier between the epithelial and endothelial cells. Type IV collagen  forms the backbone of the basement membrane by scaffolding with laminin, entactin, proteoglycans, and fibronectin. Apart from rendering structural support to the basement membrane, it also helps entail signaling potentials necessary for both pathological and physiological functions.
A type IV collagen molecule has six alpha chains which can...
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Structural Protein Function01:56

Structural Protein Function

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Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
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Fibril-associated Collagen01:11

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Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
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Fibrous Proteins00:55

Fibrous Proteins

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Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
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Related Experiment Video

Updated: Mar 22, 2026

In vitro Synthesis of Native, Fibrous Long Spacing and Segmental Long Spacing Collagen
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In vitro Synthesis of Native, Fibrous Long Spacing and Segmental Long Spacing Collagen

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Collagen structure: new tricks from a very old dog.

Jordi Bella1

  • 1Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, U.K. jordi.bella@manchester.ac.uk.

The Biochemical Journal
|April 10, 2016
PubMed
Summary

Collagen triple helix structure understanding advanced from fiber X-ray diffraction to model peptides, enabling detailed studies. Molecular engineering now creates novel collagen materials with enhanced stability and designed properties.

Keywords:
collagen recognitioncollagen stabilitycollagen structurehydrogen bondingprotein design and engineering

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Materials Science

Background:

  • Early collagen models from X-ray diffraction offered limited molecular detail.
  • Chemical synthesis of collagen model peptides revolutionized structural studies.
  • Advances have deepened understanding of collagen conformation, stability, and interactions.

Purpose of the Study:

  • To review the current understanding of collagen triple helix structure.
  • To highlight advances in collagen model peptide studies.
  • To overview developments in collagen molecular engineering.

Main Methods:

  • Fiber X-ray diffraction (historical)
  • Chemical synthesis of collagen model peptides
  • Biochemical, crystallographic, and NMR studies
  • Analysis of collagen-receptor/protein complexes
  • Protein engineering and chemical biology approaches

Main Results:

  • High-resolution structures reveal collagen conformational variability, water interactions, and stability factors.
  • Studies elucidate collagen recognition mechanisms through complexes with receptors and binding proteins.
  • Molecular engineering enables production of hyperstable collagens and designed collagenous materials.

Conclusions:

  • Detailed collagen structure knowledge fuels molecular engineering for novel biomaterials.
  • Collagen model peptides are crucial tools for understanding structure-function relationships.
  • Future directions include creating advanced collagen-based materials with tailored properties.