NEPH1 (KIRREL1) belongs to a family of three closely related transmembrane proteins of the Ig superfamily with a structure similar to that of nephrin. All three Neph proteins share a conserved podocin-binding motif; mutation of a centrally located tyrosine residue dramatically lowers the affinity of Neph1 for podocin. Neph1 triggers AP-1 activation similarly to nephrin but requires the presence of Tec family kinases for efficient transactivation. Neph1 consists of a signal peptide, five Ig-like C2-type domains with the middle domain overlapping with a PKD-like domain, an RGD sequence, a transmembrane domain and a cytoplasmic tail, which is expressed in slit diaphragm domains of podocytes and in vertebrate and invertebrate nervous systems. Neph1 is abundantly expressed in the kidney, specifically expressed in podocytes of kidney glomeruli, and plays a significant role in the normal development and function of the glomerular permeability. Neph1 interacts with nephrin in vitro and in vivo, and able to stimulate transcriptional activation in a model system, such as the activation the transcription factor AP-1 via the stimulation of a MAPK module. Neph1 is crucial for the integrity of the slit diaphragm, as Neph1 gene knockout mice results in effacement of glomerular podocytes, heavy proteinuria, and early postnatal death.
Product Name:
Mouse KIRREL1/NEPH1 Recombinant Protein (RPES4015)
Product Code:
RPES4015
Size:
50µg
Species:
Mouse
Expressed Host:
HEK293 Cells
Synonyms:
Kin of IRRE-like protein 1,Kin of irregular chiasm-like protein 1,Nephrin-like protein 1,Kirrel1,Neph1
Accession:
NP_570937.2
Sequence:
Met 1-Leu 525
Fusion tag:
C-His
Activity:
Measured by the ability of the immobilized protein to support the adhesion of MS1 mouse pancreatic islet endothelial cells (ATCC: CRL2279). When cells are added to coated plates (30 µg/mL, 100 ?L/well), > 40% cells will adhere specifically after 90 minutes at 37 ?.
Endotoxin:
<1.0 EU per µg of the protein as determined by the LAL method.
Protein Construction:
A DNA sequence encoding the extracellular domain of mouse KIRREL1 (NP_570937.2) (Met 1-Leu 525) was expressed with a C-terminal polyhistidine tag.
Purity:
> 98 % as determined by SDS-PAGE
Mol Mass:
53.8 kDa
AP Mol Mass:
65-70 kDa
Formulation:
Lyophilized from sterile PBS, pH 7.4
Shipping:
This product is provided as lyophilized powder which is shipped with ice packs.
Stability and Storage:
Lyophilized proteins are stable for up to 12 months when stored at -20 to -80°C. Reconstituted protein solution can be stored at 4-8°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.
