Collagen is a protein comprised of amino-acids, which room in turn constructed of carbon, oxygen and hydrogen. Collagen contains details amino acids – Glycine, Proline, Hydroxyproline and also Arginine.

Collagen renders up approximately 30% the the proteins in ~ the body. These are tough and solid structures discovered all end the body: in bones, tendons and ligaments.

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Where is collagen found?

In nature, collagen is discovered exclusively in animals, specifically in the flesh and also connective tissues of mammals. Collagen is a part of the connective tissue that in the skin help in firmness, suppleness and consistent renewal of skin cells. Collagen is crucial for skin elasticity.

Ligaments space another type of connective tissue that attach two bones and also consequently organize the joints together. Tendons are similar but different form of organization that connect the muscle to the bones. All of these tissues, the bones, ligaments, tendons and also the skeletal muscle themselves, are made up of proteins. One of the most predominant proteins is dubbed collagen.

Collagen is the key component of connective tissue, and is the most abundant protein in mammals, making up about 25% come 35% of the whole-body protein content.


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An atomic-force-microscopy picture of collagen fibrils in a collagen fiber. Image Credit: UChicago Argonne LLC

What go collagen do?


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Collagen help to offer strength to assorted structures that the body and likewise protects structures choose the skin by staying clear of absorption and also spreading that pathogenic substances, environmental toxins, micro - organisms and also cancerous cells. Collagen protein is the cement that holds every little thing together.

Collagen is likewise present in all the smooth muscle tissues, blood vessels digestive tract, heart, gallbladder, kidneys and also bladder stop the cells and also tissues together. Collagen is even the major component of the hair and nails.

Aging and collagen

With age, collagen production slows and also the cells frameworks weaken. The skin it s okay thinner and is easier to damage, hair it s okay lifeless, skin sags and also wrinkles, tendons and ligaments become less elastic, joints gain stiff etc.

Structure that collagen

Collagen microscopically wake up in elongated fibrils. That is mostly discovered in fibrous tissues such as tendon, ligament and also skin, and also is also abundant in cornea, bone, blood vessels, cartilage, intervertebral disc and also the digestive tract.

In muscle tissue, collagen serves together a major component the endomysium. 1 come 2% of the muscles are created of collagen and around 6% of the complete weight of muscle is created of collagen. Gelatin supplied in food is collagen that has actually been irreversibly hydrolyzed.

Molecular framework of collagen

In the mid-1930’s collagen was an initial discovered to have actually a molecular structure. Nobel laureates Crick, Pauling, Rich and also Yonath and also others including Brodsky, Berman, and also Ramachandran have been researching the structure of collagen and also their possible functions.

After numerous speculations of separation, personal, instance peptide chain, the last model that has actually been emerged is the "Madras" design which noted an essentially correct version of the molecule"s quaternary framework although this model still forced some refinement. The is a triple-helical structure.

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Collagen is further packed right into fibrillar collagen types with hexagional or quasi hexagonal shapes. The packing might be "sheet-like" or microfibrillar. The microfibrillar framework of collagen fibrils in tendon, cornea and cartilage has been directly imaged by electron microscopy.

The microfibrillar framework of adult tendon was shown in 2006 through Fraser, Miller and Wess (amongst others). They found the D-periodic pentameric arrangement and termed it microfibril.