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Home > Products > Recombinant Proteins > Recombinant Human LGALS9 protein

Recombinant Human LGALS9 protein

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Human(13)
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His(8)
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Cat.No.:
LGALS9-208H
Product Overview:
Recombinant Human LGALS9(Ala2-Thr323) was expressed in E. coli.
Description:
Galectins comprise a family of multifunctional carbohydrate-binding proteins with specificity for N‑acetyl-lactosamine-containing glycoproteins. At least 14 mammalian Galectins share structural similarities in their carbohydrate recognition domains (CRD), forming three groups: prototype (one CRD), tandem-repeat (two CRDs), and chimeric (one CRD, unique N‑terminus). Full length Galectin-9 is a widely expressed 39 kDa tandem-repeat Galectin that contains two CRDs connected by a linker region. Progressive deletion within the linker region generates a 36 kDa isoform, also known as Ecalectin or UAT, as well as a 35 kDa isoform. This recombinant protein corresponds to the Ecalectin isoform of human Galectin-9 and shares 70% and 73% aa sequence identity with the corresponding regions of mouse and rat Galectin-9, respectively. Galectin-9 exhibits a wide range of activities. All three isoforms function as eosinophil chemoattractants. This activity is destroyed by thrombin-mediated cleavage within the linker region of the long isoform, although the Ecalectin isoform is resistant to thrombin. Galectin-9 binds to carbohydrate moieties of IgE, thereby preventing immune complex formation, mast cell degranulation, and asthmatic and cutaneous anaphylaxis reactions. Independent of its lectin properties, Galectin-9 induces the maturation of dendritic cells which promote Th1 polarization. Galectin-9 induces cellular apoptosis in part by direct binding to TIM-3. Its interaction with TIM-3 inhibits Th1 cell and CD8+ cytotoxic T cell responses and also promotes regulatory T cell differentiation and activity. Galectin-9 suppresses tumor cell metastasis by interfering with the associations between hyaluronic acid and CD44 and between VCAM-1 and Integrin alpha 4 beta 1. The Ecalectin isoform (UAT; urate transporter) can also be expressed as an integral membrane protein and mediate the cellular efflux of urate.
Source:
E. coli
Species:
Human
Predicted N Terminal:
Ala2
Form:
Lyophilized from a 0.2 μm filtered solution in MOPS, NaCl, EDTA, DTT and Trehalose.
Bio-activity:
Measured by its ability to induce apoptosis of Jurkat human acute T cell leukemia cells. Lu, L.H. et al. (2007) J. Biochem. 141:157. The ED50 for this effect is typically 1-5 μg/mL. Measured by its binding ability in a functional ELISA. Immobilized Recombinant Human Galectin-9 at 500 ng/mL can bind Recombinant Human TIM-3 Fc Chimera with an apparent Kd <30 nM. Measured by its ability to agglutinate human red blood cells. Hadari, Y.R. et al. (2000) J. Cell Sci. 113:2385. The ED50 for this effect is typically 2.5‑12.5 µg/mL.
Molecular Mass:
Predicted Molecular Mass: 35.8 kDa
SDS-PAGE: 34 kDa, reducing conditions
Endotoxin:
<0.1 EU per 1 μg of the protein by the LAL method.
Purity:
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Storage:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 centigrade as supplied.
1 month, 2 to 8 centigrade under sterile conditions after reconstitution.
3 months, -20 to -70 centigrade under sterile conditions after reconstitution.
Reconstitution:
Reconstitute at 100 μg/mL in water.


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Optional requirements on this protein +Expand
C-fusion   N-fusion  Non-tagged
His   GST  Fc  Others
<1.0 eu/μg   <0.1 eu/μg  <0.01 eu/μg  Not required
Monomer Isolation   Dimer Isolation   Not required
>80% by SDS-PAGE   >90% by SDS-PAGE  >95% by SDS-PAGE  Others
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45-1 Ramsey Road, Shirley, NY 11967, USA
USA: 1-631-559-9269  1-631-448-7888
Europe: 44-207-048-3343
FAX: 1-631-938-8127
EMAIL: info@creative-biomart.com

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