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Human PIGR Protein (365 Ser/Gly, His Tag)

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Human PIGR Protein Product Information
Synonym:PIGR, FLJ22667, MGC125361, MGC125362
Protein Construction:A DNA sequence encoding the extracellular domain (Met 1-Arg 638, 365 Ser/Gly) of human PIGR (NP_002635.2) was expressed with a C-terminal polyhistidine tag.
Expressed Host:Human Cells
Shipping:In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Human PIGR Protein QC Testing
Purity:> 97 % as determined by SDS-PAGE
Bio-Activity:Measured by its binding ability in a functional ELISA .
1. Immobilized rhhuman IgM at 2 μg/ml (100 μl/well) can bind biotinylated PIGR with a linear range of 0.94-15 ng/ml.
2. When human human IgM is immobilized at 2 μg/ml (100 μl/well), PIGR inhibits 50% binding of biotinylated PIGR (0.062 μg/ml) at the concentration range of 0.03-20 μg/ml.
Endotoxin:< 1.0 EU per μg of the protein as determined by the LAL method
Stability:Samples are stable for up to twelve months from date of receipt at -70℃
Predicted N Terminal:Lys 19
Molecule Mass:The soluble form of recombinant human PIGR consists of 630 amino acids after removal of the signal peptide and has a predicted molecular mass of 69 kDa. In SDS-PAGE under reducing conditions, it migrates with an apparent molecular mass of 80-90 kDa due to glycosylation.
Formulation:Lyophilized from sterile PBS, pH 7.4
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Human PIGR Protein Usage Guide
Storage:Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution:A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
Other PIGR Recombinant Protein Products
PIGR Background

Polymeric immunoglobulin receptor, also known as PIGR, is a member of the immunoglobulin superfamily and a Fc receptor. The ectodomain of this receptor consists of five units with homology to the variable units of immunoglobulins and a transmembrane region, which also has some homology to certain immunoglobulin variable regions. PIGR is expressed on several glandular epithelia including those of liver and breast. The deduced amino-acid sequence has a length of 764 residues and shows an overall similarity of 56% and 64% with the rabbit and rat counterpart. PIGR mediates transcellular transport of polymeric immunoglobulin molecules, and thus facilitates the secretion of IgA and IgM. During this process, a cleavage occurs that separates the extracellular (known as the secretory component) from the transmembrane segment of PIGR.

Human PIGR References
  • Coyne, R. S. et al., 1995, J. Biol. Chem. 269 (50) :31620-31625. 
  • Kaetzel,C.S., 2001,  Curr Biol. 11(1): R35-38.
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    Catalog: 10131-H08H-50
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