elastin n : a fibrous scleroprotein found in elastic tissues such as the walls of arteries
protein with elastic properties, similar to collagen
- Italian: elastina
Elastin is a protein in connective tissue that is elastic and allows many tissues in the body to resume their shape after stretching or contracting. Elastin helps skin to return to its original position when it is poked or pinched. Elastin is also an important load-bearing tissue in the bodies of mammals and used in places where mechanical energy is required to be stored.
A specialized protein with the weight of 64,000-66,000, it has an irregular or random coil conformation made up of 830 amino acids.
Elastin is made by linking many soluble tropoelastin protein molecules, in a reaction catalyzed by lysyl oxidase, to make a massive insoluble, durable cross-linked array. The amino acid responsible for these cross-links is lysine.