CD33 / Siglec-3 Protein (Fc tag) (recombinant mouse)

Protein Construction: A DNA sequence encoding the extracellular domain of mouse CD33 (Q63994-1) (Met 1-Glu 240) was fused with the Fc region of human IgG1 at the C-terminus. Sequence: Met 1-Glu 240. Fusion tag: C-Fc Endotoxin: < 1.0 EU per µg of the protein as determined by the LAL method. Apparent Molecular Mass: 55-60 kDa. Protein function: Myeloid cell surface antigen CD33 also known as Sialic acid binding Ig-like lectin 3, CD33 antigen or Siglec-3, is a member of the immunoglobulin superfamily and SIGLEC (sialic acid binding Ig-like lectin) family. This Single-pass type I membrane protein contains 1 Ig-like C2-type (immunoglobulin-like) domain and 1 Ig-like V-type (immunoglobulin-like) domain. CD33 /Siglec-3 is a putative adhesion molecule of myelomonocytic-derived cells that mediates sialic-acid dependent binding to cells. CD33 /Siglec-3 preferentially binds to alpha-2,6-linked sialic acid. The sialic acid recognition site may be masked by cis interactions with sialic acids on the same cell surface. In the immune response, may act as an inhibitory receptor upon ligand induced tyrosine phosphorylation by recruiting cytoplasmic phosphatase(s) via their SH2 domain(s) that block signal transduction through dephosphorylation of signaling molecules. CD33/Siglec-3 induces apoptosis in acute myeloid leukemia (in vitro). CD33/Siglec-3 can function as Protein 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 binds sialic acid to the short O-linked glycans of certain mucins (PubMed:12773563). [The UniProt Consortium]