heparan sulfate basal lamina glycoprotein that plays a central role in the formation and the maintenance of the neuromuscular junction (NMJ) and directs key events in postsynaptic differentiation. Component of the AGRN-LRP4 receptor complex that induces the phosphorylation and activation of MUSK. The activation of MUSK in myotubes induces the formation of NMJ by regulating different processes including the transcription of specific genes and the clustering of AChR in the postsynaptic membrane. Calcium ions are required for maximal AChR clustering. AGRN function in neurons is highly regulated by alternative splicing, glycan binding and proteolytic processing. Modulates calcium ion homeostasis in neurons, specifically by inducing an increase in cytoplasmic calcium ions. Functions differentially in the central nervous system (CNS) by inhibiting the alpha(3)-subtype of Na+/K+-ATPase and evoking depolarization at CNS synapses. This secreted isoform forms a bridge, after release from motor neurons, to basal lamina through binding laminin via the NtA domain.

transmembrane form that is the predominate form in neurons of the brain, induces dendritic filopodia and synapse formation in mature hippocampal neurons in large part due to the attached glycosaminoglycan chains and the action of Rho-family GTPases.

Isoform 1, isoform 4 and isoform 5: neuron-specific (z+) isoforms that contain C-terminal insertions of 8-19 AA are potent activators of AChR clustering. Isoform 5, agrin (z+8), containing the 8-AA insert, forms a receptor complex in myotubules containing the neuronal AGRN, the muscle-specific kinase MUSK and LRP4, a member of the LDL receptor family. The splicing factors, NOVA1 and NOVA2, regulate AGRN splicing and production of the 'z' isoforms.

Isoform 3 and isoform 6: lack any 'z' insert, are muscle-specific and may be involved in endothelial cell differentiation.

is involved in regulation of neurite outgrowth probably due to the presence of the glycosaminoglcan (GAG) side chains of heparan and chondroitin sulfate attached to the Ser/Thr- and Gly/Ser-rich regions. Also involved in modulation of growth factor signaling (By similarity).

this released fragment is important for agrin signaling and to exert a maximal dendritic filopodia-inducing effect. All 'z' splice variants (z+) of this fragment also show an increase in the number of filopodia.

Description
Rabbit polyclonal antibody to AGRN

Applications 
WB, IF, ICC.

Immunogen 
AGRN Antibody detects endogenous levels of total AGRN.

Reactivity 
Human, Mouse, Rat.
可预测：Pig(100%), Zebrafish(%), Bovine(%), Dog(%), Chicken(%)

Molecular weight
217kDa, 150 kDa; 217kD(Calculated).

Host species 
Rabbit

Ig class 
Immunogen-specific rabbit IgG

Purification 
Antigen affinity purification

Full name 
AGRN

Synonyms 
AGRIN; Agrin proteoglycan; AGRN; FLJ45064; OTTHUMP00000044043;

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.

Swissprot 
O00468
 

Western blot analysis of extracts from Myeloma cells, using AGRN Antibody. The lane on the left was treated with blocking peptide. Observed bands: 150 kDa....

ab17854 staining HepG2 cells by IF/ICC. The samples were fixed with PFA and permeabilized in 0.1% Triton X-100,then blocked in 10% serum for 45 minutes at 25°C. Samples were then incubated with primary Ab(ab17854 1:200) and mouse anti-beta tubulin Ab(T0023 1:200) for 1 hour at 37°C. An AlexaFluor594 conjugated goat anti-rabbit IgG(H+L) Ab(Red) and an AlexaFluor488 conjugated goat anti-mouse IgG(H+L) Ab(Green) were used as the secondary antibody. The nuclear counter stain is DAPI(blue)....

Figure 3 Cell-based assay for the detection of agrin antibodies. HEK293T cells were transfected with a plasmid construct encoding agrin-GFP fusion to develop a cell-based assay for the detection of agrin antibody. After transfection of HEK293T cells with the plasmid construct encoding the fusion protein, green fluorescence was used to confirm fusion protein expression in transfected cells. In our cell-based assay, the binding of IgG in the patient serum is confirmed by red fluorescence. Positive control (ab17854,Affinity Biosciences, OH, USA), HC serum, and Agrin-MG serum staining of transfected cells. The complete overlap of red fluorescence and green fluorescence indicates the presence of anti-Agrin antibodies....