Human CD33 (Siglec-3) protein (Recombinant) {Biotin} (STJP000204)
SPECIFICATIONS
HostHEK293
ConjugationBiotin
ImmunogenOptimized DNA sequence encoding extracellular domain of Human CD33 including a C-terminal His tag was expressed in HEK293 cells. CD33 was further labled by Biotin for detection by avidin conjugated secondary probes. NA
General Information
| Short Description | Recombinant-Human CD33 (Siglec-3)-protein was developed from hek293. For use in research applications. |
| Applications | ELISA/WB |
| Host | HEK293 |
| Note | STRICTLY FOR FURTHER RESEARCH USE ONLY (RUO). MUST NOT TO BE USED IN DIAGNOSTIC OR THERAPEUTIC APPLICATIONS. |
Product Properties
| Conjugation | Biotin |
| Formulation | Lyophilised from 0.2 Mu m filtered PBS solution, pH7.2, 5% Trehalose. |
| Storage Instruction | Can be stored in working aliquots at 2ยฐC-8ยฐC C for one month, or at-20ยฐC to-70ยฐC for 1 year. Avoid repeated freeze/thaw cycles. NA |
| Endotoxin | Endotoxin content was assayed using a LAL gel clot method. Endotoxin level was found to be less than 0.1 ng/ยตg (1EU/ยตg). NA |
Target Information
| Gene Symbol | CD33 |
| Gene ID | 945 |
| Uniprot ID | CD33_HUMAN |
| Immunogen | Optimized DNA sequence encoding extracellular domain of Human CD33 including a C-terminal His tag was expressed in HEK293 cells. CD33 was further labled by Biotin for detection by avidin conjugated secondary probes. NA |
| Immunogen Region | ECD |
Additional Info
| Tissue Specificity | Monocytic/myeloid lineage cells. In the brain, CD33 is mainly expressed on microglial cells. |
| Post Translational Modifications | Glycosylated. Glycosylation at Asn-100 is critical for regulating ligand recognition. Phosphorylation of Tyr-340 is involved in binding to PTPN6 and PTPN11. Phosphorylation of Tyr-358 is involved in binding to PTPN6. LCK phosphorylates Tyr-340 efficiently and Tyr-358 to a lesser extent. |
| Function | Sialic-acid-binding immunoglobulin-like lectin (Siglec) that plays a role in mediating cell-cell interactions and in maintaining immune cells in a resting state. Preferentially recognizes and binds alpha-2,3- and more avidly alpha-2,6-linked sialic acid-bearing glycans. Upon engagement of ligands such as C1q or syalylated glycoproteins, two immunoreceptor tyrosine-based inhibitory motifs (ITIMs) located in CD33 cytoplasmic tail are phosphorylated by Src-like kinases such as LCK. These phosphorylations provide docking sites for the recruitment and activation of protein-tyrosine phosphatases PTPN6/SHP-1 and PTPN11/SHP-2. In turn, these phosphatases regulate downstream pathways through dephosphorylation of signaling molecules. One of the repressive effect of CD33 on monocyte activation requires phosphoinositide 3-kinase/PI3K. |
| Protein Name | Myeloid Cell Surface Antigen Cd33Sialic Acid-Binding Ig-Like Lectin 3Siglec-3Gp67Cd Antigen Cd33 |
| Database Links | Reactome: R-HSA-198933Reactome: R-HSA-6798695 |
| Cellular Localisation | Isoform Cd33m: Cell MembraneSingle-Pass Type I Membrane ProteinIsoform Cd33m: PeroxisomeCd33m Isoform Does Not Localize To Cell Surfaces But Instead Accumulates In Peroxisomes |
| Alternative Protein Names | Myeloid Cell Surface Antigen Cd33 proteinSialic Acid-Binding Ig-Like Lectin 3 proteinSiglec-3 proteinGp67 proteinCd Antigen Cd33 proteinCD33 proteinSIGLEC3 protein |
Information sourced from Uniprot.org