Related Experiment Video
Updated: May 9, 2026
07:54
In vitro Synthesis of Native, Fibrous Long Spacing and Segmental Long Spacing Collagen
Published on: September 20, 2012
Solvent specific persistence length of molecular type I collagen
Heather H Lovelady1, Satish Shashidhara, W Garrett Matthews
1Department of Physics, University of South Florida, Tampa, FL, 33620-5700.
Biopolymers
|August 3, 2013
Summary
Researchers measured the flexibility of type I collagen molecules. This molecular flexibility is crucial for understanding tissue mechanics and how collagen behaves within the body.
Area of Science:
- Biochemistry
- Materials Science
- Biophysics
Background:
- Type I collagen is vital for tissue mechanical stability.
- Tissue and fibril-level collagen properties are well-studied.
- Molecular-scale mechanical properties of collagen remain unclear.
Purpose of the Study:
- To determine the persistence length and molecular flexibility of type I collagen.
- To investigate the influence of solvent environment on collagen molecular flexibility.
- To gain insights into collagen's in situ behavior.
Main Methods:
- Pepsin-digested bovine type I collagen was used.
- Molecules were deposited from solution onto 2D surfaces.
- Conformations were analyzed to extract persistence length.
Main Results:
- Persistence length, a measure of molecular flexibility, was successfully extracted.
- Solvent choice significantly affected collagen molecule conformations and flexibility.
- This provides a quantitative measure of collagen's inherent flexibility.
Conclusions:
- The study establishes a method for measuring collagen molecular flexibility.
- Solvent effects highlight the importance of the molecular environment on collagen behavior.
- Findings contribute to understanding collagen's role in tissue mechanics at the molecular level.
Related Concept Videos
01:11Fibril-associated Collagen
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...
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...
01:05Type IV Collagen of Basal Lamina
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 exist in...
A type IV collagen molecule has six alpha chains which can exist in...
01:13Collagens are the Major Structural Proteins of ECM
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...
Connective tissue proper includes loose...
01:56Structural Protein Function
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.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
00:55Fibrous Proteins
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...