Type IV collagen chain

Type IV collagen chains are the principal structural proteins of the **basement membranes** in capillaries and many other tissues. These chains assemble into triple-helical protomers that further organize into a unique network structure, providing mechanical stability and serving as a scaffold for additional extracellular matrix molecules such as laminins, nidogens, and perlecan[1][2][3]. The **type IV collagen network** is essential for maintaining the integrity of the capillary wall under mechanical stress but is not required for initial deposition of basement membrane components during early development[2]. Mutations or defects in these chains can lead to various diseases affecting blood vessels, kidneys, eyes, and more.

Other names

Collagen type IV chainBasement membrane collagen chainCapillary basement membrane collagenCOL4A1, COL4A2, etc. (gene/protein names for specific chains)