Integrin Proteins

Integrins are non-covalently-linked, heterodimeric molecules containing an α (120~185kD)and a β (90~110kD)subunit. Both subunits are type I transmembrane proteins, containing large extracellular domains and mostly short cytoplasmic domains. As a group of cell-matrix adhesion molecules, integrins play important roles in cell survival, proliferation, motility, differentiation, and ensuring appropriate cell localization. Thus, it is predicted that integrins involve in both mechanical engagement of cell to extracellular matrix, and generation of cellular signals during cancer malignancies development.


ACROBiosystems has developed a comprehensive series of Integrin proteins expressed by HEK293. The proteins are suitable for ELISA, SPR, BLI and Cell based assay. ACRO has verified the purity and activity of the Integrin proteins, and organized the experimental operations and parameters into the corresponding protocol. Protocols are offered for free, which can help you save the development cycle.

Application

Product Features

Integrin proteins expressed by HEK293

High Bioactivity

SPR:
High Bioactivity

Human MAdCAM-1, His Tag (Cat. No. MAM-H52H4) immobilized on CM5 Chip can bind Human ITGA4&ITGB7 Heterodimer Protein, His Tag&Tag Free (Cat. No. IT7-H52W4) with an affinity constant of 0.227 μM as determined in a SPR assay (Biacore 8K) (routinely tested).

SPR:
SPR

Human Laminin 511 Protein, premium grade (Cat. No. LA8-H5283L) immobilized on CM5 Chip can bind Human Integrin alpha 6 beta 1 (ITGA6&ITGB1) Heterodimer Protein, His Tag&Tag Free with an affinity constant between 1.00 nM - 15.0 nM as determined in a SPR assay (Biacore 8K) (QC tested).

ELISA:
ELISA

Immobilized Fibronectin at 5 μg/mL (100 μL/well) can bind Biotinylated Human ITGAV&ITGB1 Heterodimer Protein, His,Avitag&Tag Free (Cat. No. IT1-H82W6) with a linear range of 0.039-0.625 μg/mL (QC tested)

ELISA

Immobilized Mouse Latent TGFB1, His Tag (Cat. No. TG1-M5245) at 2 μg/mL (100 μL/well) can bind Biotinylated Mouse ITGAV&ITGB6 Heterodimer Protein, His,Avitag&Tag Free (Cat. No. IT6-M82W9) with a linear range of 1-20 ng/mL (QC tested)

High batch-to-batch Consistency

High batch-to-batch Consistency

Immobilized Human Fibronectin at 2 μg/mL (100 μL/well) can bind Human ITGAV&ITGB1 Heterodimer Protein, His Tag & Tag Free (Cat. No. IT1-H52E1) with a linear range of 0.02-0.313 μg/mL.

* If you would like ACRO to add more experimental design and application data of Integrin, please contact us.
* If you have any customized product or more suggestion for Integrin proteins.

FAQ

Q

Why should an assembled integrin heterodimer be used instead of isolated α or β subunits?

Many ligand and antibody epitopes depend on the joint conformation of both subunits. A mammalian-expressed heterodimer therefore provides a more relevant target for affinity measurement, specificity testing, and inhibitor screening.
Q

How should I select a physiological ligand when validating an integrin protein?

Match the ligand to the heterodimer and biological pathway, such as MAdCAM-1 for α4β7, Laminin 511 for α6β1, Fibronectin for αVβ1, or latent TGF-β1 for αVβ6. Avoid using one ligand as a universal activity control across integrins.
Q

How do divalent cations affect recombinant integrin binding assays?

Ca²⁺, Mg²⁺, and Mn²⁺ can shift integrin conformation and apparent affinity; Mn²⁺ often favors a higher-affinity state. Keep cation and chelator conditions constant when ranking candidates or comparing lots.
Q

Which immobilization strategy best preserves integrin ligand-binding activity?

Avitag™-biotinylated heterodimers enable controlled streptavidin capture, while His-tagged formats support metal-chelate or anti-His capture. Pilot both orientations when the ligand-binding interface may be sensitive to surface attachment.
Q

How should SPR and ELISA data for integrin–ligand binding be interpreted together?

SPR provides kinetic measurements under a defined surface setup, while ELISA shows concentration-dependent binding and may include avidity effects. Rank candidates within one assay format and use the other as orthogonal confirmation.
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