Name :
Recombinant Human pIgR Protein (365 Ser/Gly, His Tag)
Biological Activity :
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.
Biological 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.
Expression Host :
Human
Source :
HEK293 Cells
Tag :
Protein Accession No. :
NP_002635.2
NCBI Gene ID :
Synonyms :
Synonyms :
polymeric immunoglobulin receptor
Amino Acid Sequence :
Molecular Weight :
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.
Purity :
> 97 % as determined by SDS-PAGE
State of Matter :
Product Concentration :
Storage and Stability :
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃. 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.
Endotoxin Level :
< 1.0 EU per μg of the protein as determined by the LAL method
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.
Buffer Solution :
Lyophilized from sterile PBS, pH 7.4.Please contact us for any concerns or special requirements. Normally 5 % – 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hardcopy of datasheet.
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.
Redissolution :
A hardcopy of datasheet with reconstitution instructions is sent along with the products. Please refer to it for detailed information.
Synonyms :
FLJ22667 Protein, Human; MGC125361 Protein, Human; MGC125362 Protein, Human; PIGR Protein, Human pIgR 背景信息 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.
References & Citations :
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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