α₅β₁, also known as the fibronectin receptor, is an

integrin Integrins are transmembrane receptors that facilitate cell-cell and cell-extracellular matrix (ECM) adhesion. Upon ligand binding, integrins activate signal transduction pathways that mediate cellular signals such as regulation of the cell cycle, ...

that binds to matrix macromolecules and

proteinase A protease (also called a peptidase, proteinase, or proteolytic enzyme) is an enzyme that catalyzes (increases reaction rate or "speeds up") proteolysis, breaking down proteins into smaller polypeptides or single amino acids, and spurring the for ...

s and thereby stimulates

angiogenesis Angiogenesis is the physiological process through which new blood vessels form from pre-existing vessels, formed in the earlier stage of vasculogenesis. Angiogenesis continues the growth of the vasculature by processes of sprouting and splitting ...

. It is composed of α₅ (

ITGA5 Integrin alpha-5 is a protein that in humans is encoded by the ''ITGA5'' gene. The product of this gene belongs to the integrin alpha chain family. Integrins are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain. ...

/CD49e) and β₁ (

ITGB1 Integrin beta-1 (ITGB1), also known as CD29, is a cell surface receptor that in humans is encoded by the ''ITGB1'' gene. This integrin associates with integrin alpha 1 and integrin alpha 2 to form integrin complexes which function as collagen r ...

/CD29) subunits. It is the primary receptor for fibronectin. The interaction of VLA-5 with fibronectin plays an important role in regulating inflammatory cytokine production by human articular chondrocytes (From the Cell Migration Gatewa
ITGA5 ITGB1
. α₅β₁-integrin is transported inside the cell by the kinesin

KIF1C Kinesin-like protein KIF1C is a protein that in humans is encoded by the ''KIF1C'' gene. Kif1C is a fast, plus-end directed microtubule motor. Kif1C transports α5β1-integrins in human cells. Kif1C has been shown to be non-essential in mouse wit ...

, a kinesin-3 organelle transporter that walks along

microtubules Microtubules are polymers of tubulin that form part of the cytoskeleton and provide structure and shape to eukaryotic cells. Microtubules can be as long as 50 micrometres, as wide as 23 to 27 nm and have an inner diameter between 11 an ...

References

External links

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ITGA5 ITGB1
Info with links in th
Cell Migration Gateway
Integrins {{membrane-protein-stub