Recombinant Human Myeloid cell surface antigen CD33 (CD33), partial (Active), Homo sapiens (Human), Mammalian cell, C-terminal hFc1-Myc-tagged, 56.9kDa, purity >95% as determined by SDS-PAGE.
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Recombinant Human Myeloid cell surface antigen CD33 (CD33), partial (Active)

Recombinant Human Myeloid cell surface antigen CD33 (CD33), partial (Active) — 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. Purity >95%.

SKU: BCRECP-000283 Categories: ,
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Product Specifications

Product SkuBCRECP-000283
Product DescriptionRecombinant Human Myeloid cell surface antigen CD33 (CD33) Protein is expressed from Mammalian cell with C-terminal hFc1-Myc-tagged. It contains 18-259aa. [Accession | P20138].
Uniprot No.P20138
Gene NamesCD33
PurityGreater than 95% as determined by SDS-PAGE.
Expression SystemMammalian cell
Expression Region18-259aa
SpeciesHomo sapiens (Human)
Tag InfoC-terminal hFc1-Myc-tagged
Molecular weight56.9kDa
ActivityPlease contact us to obtain bioactivity data.
BufferIf the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose.
StorageStore at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Research AreasCancer

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.

Biological Context

Subcellular Location: Peroxisome
Tissue Specificity: Monocytic/myeloid lineage cells. In the brain, CD33 is mainly expressed on microglial cells

Product Specifications

Recombinant Human Myeloid cell surface antigen CD33 (CD33), partial (Active) is a recombinant protein from Homo sapiens (Human), expressed in Mammalian cell, covering amino acids 18-259aa, with C-terminal hFc1-Myc-tagged tag, molecular weight 56.9kDa, purity Greater than 95% as determined by SDS-PAGE.. Suitable for ELISA and Western Blot applications.

SDS-PAGE: Single band at expected molecular weight confirming purity.

ELISA: Suitable as coating antigen or detection standard.

Western Blot: Compatible with standard Western Blot protocols.

Protein Interaction: Validated for SPR (Surface Plasmon Resonance) and BLI (Bio-Layer Interferometry) studies.

Shipping: Shipped at ambient temperature. Lyophilized protein is stable during transit.

Storage: Store lyophilized protein at -20°C to -80°C. Reconstituted protein should be aliquoted and stored at -80°C. Avoid repeated freeze-thaw cycles.

Shelf Life: 12 months from date of receipt when stored as recommended.

Shipping Time: Orders placed before 2 PM EST ship same day. International orders typically deliver within 5-10 business days.

Related products

Protein Biology

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 (PubMed:10611343, PubMed:11320212, PubMed:15597323). Preferentially recognizes and binds alpha-2,3- and more avidly alpha-2,6-linked sialic acid-bearing glycans (PubMed:7718872). 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 (PubMed:10887109, PubMed:28325905). These phosphorylations provide docking sites for the recruitment and activation of protein-tyrosine phosphatases PTPN6/SHP-1 and PTPN11/SHP-2 (PubMed:10206955, PubMed:10556798, PubMed:10887109). In turn, these phosphatases regulate downstream pathways through dephosphorylation of signaling molecules (PubMed:10206955, PubMed:10887109). One of the repressive effect of CD33 on monocyte activation requires phosphoinositide 3-kinase/PI3K (PubMed:15597323)

Subcellular Location

Peroxisome

Tissue Specificity

Monocytic/myeloid lineage cells. In the brain, CD33 is mainly expressed on microglial cells

Subunit

Homodimer; disulfide-linked (PubMed:10887109). Interacts with PTPN6/SHP-1 and PTPN11/SHP-2 upon phosphorylation (PubMed:10206955, PubMed:10556798). Interacts with C1QA (via C-terminus); this interaction activates CD33 inhibitory motifs (PubMed:28325905)

Gene: CD33  |  Organism: Homo sapiens  |  Synonyms: Sialic acid-binding Ig-like lectin 3; gp67
Key Publications

Frequently Asked Questions

How do I order or inquire about this product?

Fill out the Online Inquiry form with your required quantity and specifications. You can also email sales@biocrestsci.com. Our team typically responds within 4 business hours with a quote and availability confirmation.

What is the shipping and delivery time?

Orders placed before 2 PM EST ship the same day. Domestic (US) delivery typically takes 2-3 business days. International orders deliver within 5-10 business days. All products are shipped at ambient temperature with appropriate packaging to ensure stability.

How should I store this recombinant protein?

Lyophilized proteins should be stored at -20°C to -80°C upon receipt. After reconstitution, aliquot and store at -80°C. Avoid repeated freeze-thaw cycles. Shelf life is 12 months from date of receipt when stored as recommended.

What quality controls are performed on your products?

Each product undergoes SDS-PAGE purity analysis (typically >85-95%), endotoxin testing, and bioactivity validation. Products are validated for ELISA, Western Blot, and SPR/BLI applications as specified on this product page. A Certificate of Analysis (CoA) is available upon request.

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