Calnexin is a calcium-binding protein which interacts with newly synthesized glycoproteins in ER for facilitating protein assembly and/or the retention within ER of unassembled protein subunits as well as incorrectly folded proteins thereby playing a key role in ER's quality control apparatus. The specificity of calnexin for glycoproteins is defined by a lectin site, which binds an early oligosaccharide intermediate on the folding glycoprotein. When associated with partial T-cell antigen receptor complexes which escape immature thymocytes's ER, calnexin regulates thymocyte maturation process and is also implicated in receptor-mediated endocytosis at synapses. MAPK3/ERK1 phosphorylates calnexin at Ser-565 leading to increased calnexin-ribosomal association and DHHC6 mediated calnexin palmitoylation leads to its preferential localization to perinuclear rough ER. Palmitoylation also facilitate calnexin association with RTC/ribosome-translocon complex that is essential to efficient folding of glycosylated proteins.
Applications:
Suitable for use in Immunocytochemistry/Immunofluorescence, Western Blot, Immunoprecipitation and Immunohistochemistry. Other applications not tested.
Recommended Dilution:
Immunocytochemistry/Immunofluorescence: 1:100
Western Blot: 1:1000
Immunoprecipitation: 1:100
Immunohistochemistry (Paraffin): 1:100, using antigen retrieval with sodium citrate buffer (pH 6.0).
Optimal dilutions to be determined by the researcher.
Positive Control:
HeLa cells, HeLa whole cell lysate, Mouse bladder tissue.
Storage and Stability:
May be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.