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Related Concept Videos

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 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.
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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.
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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.
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Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
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Revealing the Cytoskeletal Organization of Invasive Cancer Cells in 3D
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Cell-Populated Collagen Lattice Models.

Beate Eckes1, Fang Wang2, Laure Rittié3,4

  • 1Department of Dermatology, University of Cologne, Cologne, Germany. beate.eckes@uni.koeln.de.

Methods in Molecular Biology (Clifton, N.J.)
|August 25, 2017
PubMed
Summary
This summary is machine-generated.

Researchers are improving cell culture by using 3D collagen lattices. This method offers a more realistic environment for studying cell function and behavior in vitro, mimicking in vivo conditions.

Keywords:
Collagen-binding integrinFibroblastMMPMechanical forceMorphologyThree-dimensional culture

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Area of Science:

  • Cell Biology
  • Biotechnology
  • Tissue Engineering

Background:

  • Investigating cell function is challenging due to complex tissue environments.
  • Traditional cell culture in 2D monolayers does not replicate the in vivo cellular environment.
  • A more physiologically relevant in vitro model is needed for accurate cell studies.

Purpose of the Study:

  • To introduce and validate the use of three-dimensional (3D) collagen lattices for cell culture.
  • To provide a more physiologically accurate in vitro environment for studying cell behavior.
  • To demonstrate the adaptability of 3D collagen lattices for various cell types and experimental conditions.

Main Methods:

  • Cells are cultured within 3D collagen lattices, offering a spatial environment.
  • Collagen lattices are manipulated to control mechanical forces and accommodate different cell types.
  • Techniques for imaging, gene expression analysis, and protein monitoring are applied to cells in 3D culture.

Main Results:

  • 3D collagen lattices provide an "in vivo-like" environment for cell culture.
  • This method circumvents the limitations of traditional 2D cell culture.
  • The system allows for detailed monitoring of cellular activities, including gene and protein expression.

Conclusions:

  • Three-dimensional collagen lattices represent an optimized in vitro culture system.
  • This approach enhances the study of cell function by better mimicking in vivo conditions.
  • The versatility of collagen lattices supports diverse cell biology investigations.