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Item number | Size | Datasheet | Manual | SDS | Delivery time | Quantity | Price |
---|---|---|---|---|---|---|---|
I7661-36R.50 | 50 µg | - | - |
3 - 19 business days* |
1,137.00€
|
If you have any questions, please use our Contact Form.
You can also order by e-mail: info@biomol.com
Larger quantity required? Request bulk
You can also order by e-mail: info@biomol.com
Larger quantity required? Request bulk
Integrin alphaLbeta2 is one of three beta2 integrin adhesion proteins. The non-covalent... more
Product information "Integrin alphaL, beta2, Recombinant, Human (LFA-1, CD11a/CD18)"
Integrin alphaLbeta2 is one of three beta2 integrin adhesion proteins. The non-covalent heterodimer of 180kD aL/CD11a and 95kD b2/CD18 integrin subunits is expressed on virtually all leukocytes. The ligand binding site of LFA-1 is in the N-terminal head region, formed by an interaction of the vWFA (I, I-like) domains from each subunit, and the aL betapropeller structure. The aL subunit contains domains termed thigh, calf-1 and calf-2, while the b2 subunit contains a PSI region and four cysteine-rich I-EGF folds. Each subunit has a transmembrane sequence and a short cytoplasmic tail connected to the cytoskeleton. Upon activation by "inside-out" signaling, clustering, or Mg2+ or Mn2+ binding to metal ion-dependent adhesion sites within the vWFA domains, the molecule unfolds from its inactive, "closed" conformation to expose ligand binding sites. Active aLb2 binds ICAM-1/CD54, ICAM-2, ICAM-3 and JAM-A. The adhesion stabilizes interactions between T cells and antigen-presenting cells, decreases the T cell activation threshold and facilitates leukocyte transendothelial migration to sites of inflammation. A constitutively active construct severely impairs immune responses, demonstrating that both activation and de-activation are important. Mutations of b2, especially in the vWFA domain, cause leukocyte adhesion deficiency (LAD-1) and susceptibility to bacterial infections. The 1088aa human aL/CD11b is 73-74% aa identical to mouse and rat, and 79-80% aa identical to bovine, porcine, ovine, goat and canine. The 678aa human b2/CD18 shares 81-83% aa sequence identity with mouse, rat, bovine, canine, goat, ovine and porcine b2 ECD. A second human aL isoform has 53 aa inserted after aa 954 in the ECD. The 678 aa human b 2/CD18 ECD shares 81-83% aa sequence identity with mouse, rat, bovine, canine, goat, ovine and porcine b2 ECD. Source: Human Integrin alpha L (Tyr26-Met1089) acidic tail, ~121.7kD, Accession #P20701, Human Integrin beta2 (Gln23-Asn700) basic tail, ~79kD, Accession #P05107 expressed in Chinese hamster ovary (CHO) cells. Molecular Mass: Based on N-terminal sequencing, the recombinant human Integrin aL subunit starts at Tyr 26 and has a calculated molecular mass of approximately 121.7kD. The N-terminal sequence of the b2 subunit was blocked, suggesting that the b2 subunit may start at the predicted Gln 23 and has a calculated molecular mass of approximately 79kD. As a result of glycosylation, the recombinant proteins migrate as approximately 160 and 100kD protein bands in SDS-PAGE under reducing conditions. SDS-PAGE: ~160kD and 100kD under reducing conditions. Predicted MW: 121.7kD (Integrin aL), 79kD (Integrin b2), Biological Activity: Measured by the ability of the immobilized protein to support the adhesion of CHO cells transfected with human ICAM-1. When 5x10e4 cells/well are added to Integrin aLb2-coated plates (5ug/ml, 100ul/well), 60-80% of the cells will adhere after 1 hour at 37°C in the presence of 1mM MnCl2. Storage and Stability: Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile PBS. Aliquot to avoid repeated freezing and thawing. Store at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
Keywords: | CD18, ITGB2, Integrin beta-2, Complement receptor C3 subunit beta, Cell surface adhesion glycoproteins LFA-1/CR3/p150,95 subunit beta |
Supplier: | United States Biological |
Supplier-Nr: | I7661-36R |
Properties
Conjugate: | No |
Species reactivity: | human |
Format: | Highly Purified |
Database Information
KEGG ID : | K06464 | Matching products |
UniProt ID : | P05107 | Matching products |
Gene ID | GeneID 3689 | Matching products |
Handling & Safety
Storage: | -20°C |
Shipping: | +4°C (International: +4°C) |
Caution
Our products are for laboratory research use only: Not for administration to humans!
Our products are for laboratory research use only: Not for administration to humans!
Information about the product reference will follow.
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