1. Recombinant Proteins
  2. CAR-T Related Proteins CD Antigens Receptor Proteins Fluorescent-labeled Recombinant Proteins
  3. NK Cell CD Proteins Macrophage CD Proteins Monocyte CD Proteins Stem Cell CD Proteins Dendritic Cell CD Proteins Siglec
  4. Siglec-3/CD33 Siglec-3/CD33
  5. FITC-Labeled Siglec-3/CD33 Protein, Human (HEK293, Fc)

FITC-Labeled Siglec-3/CD33 Protein, Human (HEK293, Fc)

Cat. No.: HY-P701262
Handling Instructions Technical Support

Siglec-3/CD33 protein is a sialic acid-binding lectin that mediates cell-cell interactions and maintains immune cell quiescence. It prefers α-2,3- and α-2,6-linked glycans with sialic acid. FITC-Labeled Siglec-3/CD33 Protein, Human (HEK293, Fc) is the recombinant human-derived FITC-Labeled Siglec-3/CD33 protein, expressed by HEK293 , with Fc labeled tag.

For research use only. We do not sell to patients.

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Description

Siglec-3/CD33 protein is a sialic acid-binding lectin that mediates cell-cell interactions and maintains immune cell quiescence. It prefers α-2,3- and α-2,6-linked glycans with sialic acid. FITC-Labeled Siglec-3/CD33 Protein, Human (HEK293, Fc) is the recombinant human-derived FITC-Labeled Siglec-3/CD33 protein, expressed by HEK293 , with Fc labeled tag.

Background

The Siglec-3/CD33 protein, a sialic-acid-binding immunoglobulin-like lectin, plays a crucial role in mediating cell-cell interactions and maintaining immune cells in a resting state. It exhibits a preference for recognizing and binding alpha-2,3- and more avidly alpha-2,6-linked sialic acid-bearing glycans. Upon engagement with ligands like C1q or sialylated glycoproteins, two immunoreceptor tyrosine-based inhibitory motifs (ITIMs) within CD33's cytoplasmic tail undergo phosphorylation by Src-like kinases such as LCK. These phosphorylated ITIMs serve as docking sites for recruiting and activating protein-tyrosine phosphatases PTPN6/SHP-1 and PTPN11/SHP-2, which, in turn, regulate downstream pathways through dephosphorylation of signaling molecules. CD33's repressive effect on monocyte activation involves phosphoinositide 3-kinase/PI3K. Structurally, the protein forms homodimers through disulfide linkages and interacts with PTPN6/SHP-1 and PTPN11/SHP-2 upon phosphorylation. It also engages with C1QA via its C-terminus, activating CD33 inhibitory motifs.

Species

Human

Source

HEK293

Tag

Fc

Accession

P20138-1 (D18-H259)

Gene ID

945

Synonyms
CD33; SIGLEC3; gp67
Molecular Weight

70-90 kDa

Purity

Greater than 90% as determined by reducing SDS-PAGE.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Documentation

FITC-Labeled Siglec-3/CD33 Protein, Human (HEK293, Fc) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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FITC-Labeled Siglec-3/CD33 Protein, Human (HEK293, Fc)
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HY-P701262
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