CD33 Antibody - #DF6789

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Product: CD33 Antibody
Catalog: DF6789
Description: Rabbit polyclonal antibody to CD33
Application: WB IHC
Reactivity: Human, Mouse
Mol.Wt.: 40kDa,60kDa; 40kD(Calculated).
Uniprot: P20138
RRID: AB_2838751

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Related Downloads
MS Report
HPLC Report
MSDS
Data Sheet
COA
Protocols
WB Handbook
IHC Protocol
IF/ICC Protocol

Product Info

Source:
Rabbit
Application:
WB 1:500-1:2000, IHC 1:50-1:200
*The optimal dilutions should be determined by the end user.
*Tips:

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Reactivity:
Human,Mouse
Clonality:
Polyclonal
Specificity:
CD33 Antibody detects endogenous levels of total CD33.
RRID:
AB_2838751
Cite Format: Affinity Biosciences Cat# DF6789, RRID:AB_2838751.
Conjugate:
Unconjugated.
Purification:
The antiserum was purified by peptide affinity chromatography using SulfoLink™ Coupling Resin (Thermo Fisher Scientific).
Storage:
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.
Alias:

Fold/Unfold

CD 33; CD33; CD33 antigen (gp67); CD33 antigen; CD33 molecule; CD33_HUMAN; FLJ00391; gp67; My9; Myeloid cell surface antigen CD33; Myeloid cell surface antigen CD33 precursor; Myeloid differentiation antigen CD33; p67; Sialic acid binding Ig like lectin 3; Sialic acid binding immunoglobulin like lectin 3; Sialic acid-binding Ig-like lectin 3; SIGLEC 3; Siglec-3; SIGLEC3;

Immunogens

Immunogen:
Uniprot:

P20138(CD33_HUMAN) >>Visit HPA database.

Gene(ID):
CD33(945)
Expression:
P20138 CD33_HUMAN:

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

Description:
CD33 is a type I transmembrane glycoprotein that is found on granulocyte and macrophage precursors in the bone marrow, but is absent from pluripotent stem cells. CD33 is also expressed on monocytes in peripheral blood. It is used as a marker to distinguish myelogenous leukemia cells from lymphoid or erythroid leukemias. CD33 may function as a sialic acid-dependent cell adhesion molecule.
Sequence:
MPLLLLLPLLWAGALAMDPNFWLQVQESVTVQEGLCVLVPCTFFHPIPYYDKNSPVHGYWFREGAIISRDSPVATNKLDQEVQEETQGRFRLLGDPSRNNCSLSIVDARRRDNGSYFFRMERGSTKYSYKSPQLSVHVTDLTHRPKILIPGTLEPGHSKNLTCSVSWACEQGTPPIFSWLSAAPTSLGPRTTHSSVLIITPRPQDHGTNLTCQVKFAGAGVTTERTIQLNVTYVPQNPTTGIFPGDGSGKQETRAGVVHGAIGGAGVTALLALCLCLIFFIVKTHRRKAARTAVGRNDTHPTTGSASPKHQKKSKLHGPTETSSCSGAAPTVEMDEELHYASLNFHGMNPSKDTSTEYSEVRTQ

PTMs - P20138 As Substrate

Site PTM Type Enzyme
K77 Ubiquitination
N100 N-Glycosylation
T226 Phosphorylation
T239 Phosphorylation
S248 Phosphorylation
K250 Ubiquitination
T299 Phosphorylation
T302 Phosphorylation
S307 Phosphorylation
Y340 Phosphorylation P12931 (SRC) , P06239 (LCK)
Y358 Phosphorylation
T363 Phosphorylation

Research Backgrounds

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.

PTMs:

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.

Subcellular Location:

Cell membrane>Single-pass type I membrane protein.

Peroxisome.
Note: CD33m isoform does not localize to cell surfaces but instead accumulates in peroxisomes.

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Tissue Specificity:

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

Subunit Structure:

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

Family&Domains:

Contains 2 copies of a cytoplasmic motif that is referred to as the immunoreceptor tyrosine-based inhibitor motif (ITIM). This motif is involved in modulation of cellular responses. The phosphorylated ITIM motif can bind the SH2 domain of several SH2-containing phosphatases.

Belongs to the immunoglobulin superfamily. SIGLEC (sialic acid binding Ig-like lectin) family.

Research Fields

· Organismal Systems > Immune system > Hematopoietic cell lineage.   (View pathway)

References

1). Long-Term Administration of Triterpenoids From Ganoderma lucidum Mitigates Age-Associated Brain Physiological Decline via Regulating Sphingolipid Metabolism and Enhancing Autophagy in Mice. Frontiers in Aging Neuroscience, 2021 (PubMed: 34025387) [IF=4.8]

Application: WB    Species: Mice    Sample: brain tissues

FIGURE 9 Ameliorate effects of Ganodenic acid A by regulating sphingolipid metabolism in 3 × Tg-AD mice. (A) Experimental procedure in 3 × Tg-AD mice; (B) The AD biomarkers of p-Tau, Aβ, APOE, TREM2, CD33, the inflammatory cytokines of TNF-α and NF-κB p65 and the autophagy level of LC3A/B were measured in brain tissues; (C) KEGG analysis of serum metabolites; (D) KEGG analysis of brain metabolites. Data are presented as the means ± SD of more than six independent experiments and six independent experiments in Western blot. *p < 0.05, **p < 0.01, and ***p < 0.001.

Application: WB    Species: mouse    Sample: brain

FIGURE 9 | Ameliorate effects of Ganodenic acid A by regulating sphingolipid metabolism in 3 × Tg-AD mice. (A) Experimental procedure in 3 × Tg-AD mice;(B) The AD biomarkers of p-Tau, Aβ, APOE, TREM2, CD33, the inflammatory cytokines of TNF-α and NF-κB p65 and the autophagy level of LC3A/B were measured in brain tissues

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