Integrin beta-5 is a protein that in humans is encoded by the ITGB5 gene.
Integrin, beta 5 has been shown to interact with PTK2, Annexin A5 and PAK4.
ITGB5 encodes a subunit of integrin that can interact with the integrin alpha v to form the integrin alpha v beta 5 integrin heterodimer. Integrin alpha V beta 5 is a receptor for the extracellular matrix protein Vitronectin and can form both focal adhesions and reticular adhesions.
Elevated levels of ITGB5 have been found in patients with autosomal dominant osteopetrosis type II, a rare disease of bones.