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大鼠 Siglec-2 / CD22 蛋白 (ECD, Fc 標籤)

產品資料評論相關產品實驗方法
Rat Cd22 蛋白產品資訊
分子別稱:Cd22_predicted
蛋白構建:A DNA sequence encoding the rat Cd22 (NP_001100973.1) (Met1-Arg692) was expressed with the Fc region of human IgG1 at the C-terminus.
分子種屬:Rat
表達宿主:Human Cells
#N/A:In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Rat Cd22 蛋白質控檢測
純度:> 95 % as determined by SDS-PAGE
內毒素:< 1.0 EU per μg protein as determined by the LAL method.
穩定性:Samples are stable for up to twelve months from date of receipt at -70℃
預測N端:Trp 24
分子量:The recombinant rat Cd22 consists 907 amino acids and predicts a molecular mass of 102 kDa.
緩衝液:Lyophilized from sterile PBS, pH 7.4.
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Rat Cd22 蛋白使用指導
儲存方法:Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
#N/A:A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
Rat Cd22 Protein SDS-PAGE
Rat Siglec-2 / CD22 Protein (ECD, Fc Tag)

Cd22 相關信號通路

Other Cd22 Recombinant Protein Products
CD22/Siglec-2 研究背景

CD22 is a member of the immunoglobulin superfamily, SIGLEC family of lectins. It is first expressed in the cytoplasm of pro-B and pre-B cells, and on the surface as B cells mature to become IgD+. CD22 serves as an adhesion receptor for sialic acid-bearing ligands expressed on erythrocytes and all leukocyte classes. In addition to its potential role as a mediator of intercellular interactions, signal transduction through CD22 can activate B cells and modulate antigen receptor signaling in vitro. The phenotype of CD22-deficient mice suggests that CD22 is primarily involved in the generation of mature B cells within the bone marrow, blood, and marginal zones of lymphoid tissues. CD22 recruits the tyrosine phosphatase Src homology 2 domain-containing phosphatase 1 (SHP-1) to immunoreceptor tyrosine-based inhibitory motifs (ITIMs) and inhibits B-cell receptor (BCR)-induced Ca2+ signaling on normal B cells. CD22 interacts specifically with ligands carrying alpha2-6-linked sialic acids. As an inhibitory coreceptor of the B-cell receptor (BCR), CD22 plays a critical role in establishing signalling thresholds for B-cell activation. Like other coreceptors, the ability of CD22 to modulate B-cell signalling is critically dependent upon its proximity to the BCR, and this in turn is governed by the binding of its extracellular domain to alpha2,6-linked sialic acid ligands. However, genetic studies in mice reveal that some CD22 functions are regulated by ligand binding, whereas other functions are ligand-independent and may only require expression of an intact CD22 cytoplasmic domain at the B-cell surface. CD19 regulates CD22 phosphorylation by augmenting Lyn kinase activity, while CD22 inhibits CD19 phosphorylation via SHP-1.

Rat CD22/Siglec-2 參考資料
  • Tedder TF, et al. (1997) CD22, a B lymphocyte-specific adhesion molecule that regulates antigen receptor signaling. Annu Rev Immunol. 15: 481-504.
  • Tedder TF, et al. (2005) CD22: a multifunctional receptor that regulates B lymphocyte survival and signal transduction. Adv Immunol. 88: 1-50.
  • Fujimoto M, et al. (2007) B cell signaling and autoimmune diseases: CD19/CD22 loop as a B cell signaling device to regulate the balance of autoimmunity. J Dermatol Sci. 46(1): 1-9.
  • Walker JA, et al. (2008) CD22: an inhibitory enigma. Immunology. 123(3): 314-25.
  • Nitschke L. (2009) CD22 and Siglec-G: B-cell inhibitory receptors with distinct functions. Immunol Rev. 230(1): 128-43.
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    貨號: 81343-R02H-5
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    • Rat Siglec-2 / CD22 Protein (ECD, Fc Tag)
      All information of our products is subject to change without notice. Please refer to COA enclosed in shipped package for the newest information.
      請注意:所有產品都是“僅用於科研,而不能用於診斷或治療用途”