PRODUCT CODE: ER1802-28

CXCR4 Antibody (ER1802-28)

Applications

  • WB

  • ICC

  • IHC-P

  • FC

REACTIVITY

  • Human

  • Rat

Western blot analysis of CXCR4 on different cell lysates using anti-CXCR4 antibody at 1/500 dilution.<br />
 Positive control:<br />
 Lane 1: 293 <br />
 Lane 2: K562<br />
  • Western blot analysis of CXCR4 on different cell lysates using anti-CXCR4 antibody at 1/500 dilution.<br />
 Positive control:<br />
 Lane 1: 293 <br />
 Lane 2: K562<br />
  • ICC staining CXCR4 in Hela cells (green). The nuclear counter stain is DAPI (blue). Cells were fixed in paraformaldehyde, permeabilised with 0.25% Triton X100/PBS.
  • ICC staining CXCR4 in HUVEC cells (green). The nuclear counter stain is DAPI (blue). Cells were fixed in paraformaldehyde, permeabilised with 0.25% Triton X100/PBS.
  • Immunohistochemical analysis of paraffin-embedded human tonsil tissue using anti-CXCR4 antibody. Counter stained with hematoxylin.
  • Immunohistochemical analysis of paraffin-embedded human liver tissue using anti-CXCR4 antibody. Counter stained with hematoxylin.
  • Immunohistochemical analysis of paraffin-embedded rat lung tissue using anti-CXCR4 antibody. Counter stained with hematoxylin.
  • Flow cytometric analysis of THP-1 cells with CXCR4 antibody at 1/100 dilution (red) compared with an unlabelled control (cells without incubation with primary antibody; black). Alexa Fluor 488-conjugated goat anti-rabbit IgG was used as the secondary antibody.
Western blot analysis of CXCR4 on different cell lysates using anti-CXCR4 antibody at 1/500 dilution.
Positive control:
Lane 1: 293
Lane 2: K562

Applications

  • WB

  • ICC

  • IHC-P

  • FC

REACTIVITY

  • Human

  • Rat

SPECIFICATIONS

Product Type

Rabbit polyclonal primary

Product Name

CXCR4 Antibody (ER1802-28)

Immunogen

Peptide

Host

Rabbit

Positive Control

293, K562, Hela, HUVEC, rat lung tissue, human tonsil tissue, human liver tissue, THP-1.

Conjugation

Unconjugated

Clonality

Polyclonal

PROPERTIES

Form

Liquid

Storage Condition

Store at +4C after thawing. Aliquot store at -20C or -80C. Avoid repeated freeze / thaw cycles.

Storage Buffer

1*PBS (pH7.4), 0.2% BSA, 50% Glycerol. Preservative: 0.05% Sodium Azide.

Concentration

1 ug/ul

PURIFICATION

Peptide affinity purified

MOLECULAR WEIGHT

45 kDa

Isotype

IgG

APPLICATION DILUTION

  • WB

  • 1:500-1:1,000

  • ICC

  • 1:500-1:2,000

  • IHC-P

  • 1:50-1:200

  • FC

  • 1:50-1:100

TARGET

UNIPROT #

PROTEIN NAME

C-X-C chemokine receptor type 4

GENE NAME

CXCR4

SYNONYMS

CXC-R4, CXCR-4, LESTR, LAP-3, LPS-associated protein 3, SDF-1 receptor, CXCR4

SEQUENCE SIMILARITIES

Belongs to the G-protein coupled receptor 1 family.

TISSUE SPECIFICITY

Expressed in numerous tissues, such as peripheral blood leukocytes, spleen, thymus, spinal cord, heart, placenta, lung, liver, skeletal muscle, kidney, pancreas, cerebellum, cerebral cortex and medulla (in microglia as well as in astrocytes), brain microvascular, coronary artery and umbilical cord endothelial cells. Isoform 1 is predominant in all tissues tested.

POST-TRANSLATIONAL MODIFICATION

Phosphorylated on agonist stimulation. Rapidly phosphorylated on serine and threonine residues in the C-terminal. Phosphorylation at Ser-324 and Ser-325 leads to recruitment of ITCH, ubiquitination and protein degradation.; Ubiquitinated after ligand binding, leading to its degradation. Ubiquitinated by ITCH at the cell membrane on agonist stimulation. The ubiquitin-dependent mechanism, endosomal sorting complex required for transport (ESCRT), then targets CXCR4 for lysosomal degradation. This process is dependent also on prior Ser-/Thr-phosphorylation in the C-terminal of CXCR4. Also binding of ARRB1 to STAM negatively regulates CXCR4 sorting to lysosomes though modulating ubiquitination of SFR5S.; Sulfation on Tyr-21 is required for efficient binding of CXCL12/SDF-1alpha and promotes its dimerization. Tyr-7 and Tyr-12 are sulfated in a sequential manner after Tyr-21 is almost fully sulfated, with the binding affinity for CXCL12/SDF-1alpha increasing with the number of sulfotyrosines present. Sulfotyrosines Tyr-7 and Tyr-12 occupy clefts on opposing CXCL12 subunits, thus bridging the CXCL12 dimer interface and promoting CXCL12 dimerization.; O- and N-glycosylated. Asn-11 is the principal site of N-glycosylation. There appears to be very little or no glycosylation on Asn-176. N-glycosylation masks coreceptor function in both X4 and R5 laboratory-adapted and primary HIV-1 strains through inhibiting interaction with their Env glycoproteins. The O-glycosylation chondroitin sulfate attachment does not affect interaction with CXCL12/SDF-1alpha nor its coreceptor activity.

SUBCELLULAR LOCATION

Cell membrane; Multi-pass membrane protein. Cell junction. Early endosome. Late endosome. Lysosome. Note=In unstimulated cells, diffuse pattern on plasma membrane. On agonist stimulation, colocalizes with ITCH at the plasma membrane where it becomes ubiquitinated. In the presence of antigen, distributes to the immunological synapse forming at the T-cell-APC contact area, where it localizes at the peripheral and distal supramolecular activation cluster (SMAC).

FUNCTION

Receptor for the C-X-C chemokine CXCL12/SDF-1 that transduces a signal by increasing intracellular calcium ion levels and enhancing MAPK1/MAPK3 activation. Involved in the AKT signaling cascade. Plays a role in regulation of cell migration, e.g. during wound healing. Acts as a receptor for extracellular ubiquitin; leading to enhanced intracellular calcium ions and reduced cellular cAMP levels. Binds bacterial lipopolysaccharide (LPS) et mediates LPS-induced inflammatory response, including TNF secretion by monocytes. Involved in hematopoiesis and in cardiac ventricular septum formation. Also plays an essential role in vascularization of the gastrointestinal tract, probably by regulating vascular branching and/or remodeling processes in endothelial cells. Involved in cerebellar development. In the CNS, could mediate hippocampal-neuron survival (By similarity).; (Microbial infection) Acts as a coreceptor (CD4 being the primary receptor) for human immunodeficiency virus-1/HIV-1 X4 isolates and as a primary receptor for some HIV-2 isolates. Promotes Env-mediated fusion of the virus.