Creative BioMart to Present at
                        BIO-Europe Spring Creative BioMart to Present at IMMUNOLOGY2024™|May 3-7, 2024|Booth #512

Active Recombinant Human CD33 protein, His-Avi-tagged, Biotinylated

Cat.No. : CD33-051H
Product Overview : Biotinylated Recombinant Human CD33(Met17-His259) protein, fused to his tag and Avi tag at the C-terminus, was expressed in CHO cells.
  • Specification
  • Gene Information
  • Related Products
  • Download
Description : CD33 is I-type (Ig-type) lectins belonging to the Ig superfamily. They are characterized by an N-terminal Ig-like V-type domain which mediates sialic acid binding, followed by varying numbers of Ig-like C2-type domains (1, 2). Eleven human Siglecs have been cloned and characterized. They are sialoadhesin/CD169/Siglec-1, CD22/Siglec-2, CD33/Siglec-3, Myelin-Associated Glycoprotein (MAG/Siglec-4a) and Siglecs 5 to 11 (1-3). To date, no Siglec has been shown to recognized any cell surface ligand other than sialic acids, suggesting that interactions with glycans containing this carbohydrate are important in mediating the biological functions of Siglecs. Siglecs 5 to 11 share a high degree of sequence similarity with CD33/Siglec-3 both in their extracellular and intracellular regions. They are collectively referred to as CD33-related Siglecs. One remarkable feature of the CD33-related Siglecs is their differential expression pattern within the hematopoietic system (1, 2). This fact, together with the presence of two conserved immunoreceptor tyrosine-based inhibition motifs (ITIMs) in their cytoplasma tails, suggests that CD33-related Siglecs are involved in the regulation of cellular activation within the immune system. Human Siglec-3 is alternatively known as myeloid cell surface antigen CD33 and GP67. Human Siglec-3 cDNA encodes a 364 amino acid (aa) polypeptide with a hydrophobic signal peptide, an N-terminal Iglike V-type domain, one Ig-like C2-type domains, a transmembrane region and a cytoplasmic tail (1, 4). Siglec-3 expression is restricted to cells of myelomonocytic lineage (2). It binds sialic acid preferring α2,3- linkage over α2,6- linkage (5). Studies indicated that Siglec-3 recruits SHP-1 and SHP-2 to its ITIMs (6, 7). When cocrosslinking with FcγR1, Siglec-3 inhibits tyrosine phosphorylation and calcium mobilization, suggesting Siglec-3 can mediate inhibitory signals (7).
Source : CHO cells
Species : Human
Tag : His/Avi
Predicted N Terminal : Met17
Form : Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Bio-activity : Measured by its binding ability in a functional ELISA. When Human CD33 Antibody is immobilized at 0.5 µg/mL (100 µL/well), Biotinylated Recombinant Human CD33 His-tag Avi-tag binds with an ED50 of 60-360 ng/mL. Measured by the ability of the immobilized protein to support the adhesion of human red blood cel. The ED50 for this effect is 0.05-0.4 μg/mL.
The ED50 for this effect is 0.05-0.4 μg/mL.
Molecular Mass : 45-52 kDa, under reducing conditions
Protein length : Met17-His259
Endotoxin : <0.10 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.
Applications : Bioactivity
Storage : Use a manual defrost freezer and avoid repeated freeze-thaw cycles.12 months from date of receipt, -20 to -70 °C as supplied.1 month, 2 to 8 °C under sterile conditions after reconstitution.3 months, -20 to -70 °C under sterile conditions after reconstitution.
Reconstitution : Reconstitute at 500 μg/mL in PBS.
Gene Name : CD33 CD33 molecule [ Homo sapiens ]
Official Symbol : CD33
Synonyms : CD33; CD33 molecule; CD33 antigen (gp67); myeloid cell surface antigen CD33; FLJ00391; p67; sialic acid binding Ig like lectin 3; SIGLEC 3; SIGLEC3; gp67; sialic acid binding Ig-like lectin 3; sialic acid-binding Ig-like lectin 3; SIGLEC-3;
Gene ID : 945
mRNA Refseq : NM_001082618
Protein Refseq : NP_001076087
MIM : 159590
UniProt ID : P20138

For Research Use Only. Not intended for any clinical use. No products from Creative BioMart may be resold, modified for resale or used to manufacture commercial products without prior written approval from Creative BioMart.

Inquiry

  • Q&As
  • Reviews

Q&As (7)

Ask a question
What are the implications of CD33 polymorphisms in therapeutic targeting? 10/18/2022

Certain polymorphisms in the CD33 gene can influence its expression on the cell surface, which might affect the efficacy of CD33-targeted therapies.

What is the primary biological function of CD33 in hematopoietic cells? 10/08/2022

CD33 is a transmembrane receptor primarily expressed on cells of myeloid lineage and is involved in modulating cellular functions, including the regulation of cellular proliferation and differentiation.

How does CD33 expression vary among different leukocyte populations? 01/11/2022

CD33 is predominantly expressed on myeloid cells, especially on immature myeloid cells. Its expression decreases as these cells differentiate and is typically low or absent on lymphoid cells.

How has CD33 been utilized as a therapeutic target in hematological malignancies? 09/22/2021

CD33 has been targeted for therapeutic antibodies in AML. An example is gemtuzumab ozogamicin, which targets CD33 and delivers a cytotoxic agent specifically to leukemia cells expressing CD33.

How does CD33 signaling influence myeloid cell differentiation? 06/08/2020

While the exact signaling pathways of CD33 are still under investigation, it is believed that CD33 signaling can influence the differentiation and function of myeloid cells, potentially playing a role in immune regulation.

What role does CD33 play in acute myeloid leukemia (AML)? 03/30/2019

CD33 is commonly expressed on the surface of AML blasts, making it a potential target for therapeutic interventions in AML.

Are there known ligands that bind specifically to CD33? 06/20/2018

The specific ligands for CD33 are not fully characterized, but it is believed to play a role in cell-cell interactions within the immune system.

Customer Reviews (3)

Write a review
Reviews
11/14/2019

    Quick dissolution, easy use.

    08/27/2019

      Excellent solubility, no aggregates.

      02/27/2019

        High concentration, very effective.

        Ask a Question for All CD33 Products

        Required fields are marked with *

        My Review for All CD33 Products

        Required fields are marked with *

        0

        Inquiry Basket

        cartIcon
        logo

        FOLLOW US

        Terms and Conditions        Privacy Policy

        Copyright © 2024 Creative BioMart. All Rights Reserved.

        Contact Us

        • /

        Stay Updated on the Latest Bioscience Trends