Contactins are a subgroup of molecules belonging to the immunoglobulin superfamily that are expressed exclusively in the nervous system. The subgroup consists of six members: Contactin-1; Contactin-2(TAG-1); Contactin-3(BIG-1); BIG-2; Contactin-5(NB-2) and NB-3. Since their identification in the late 1980s; Contactin-1 and Contactin-2 have been studied extensively. Axonal expression and the neurite extension activity of Contactin-1 and Contactin-2 attracted researchers to study the function of these molecules in axon guidance during development. Contactin-1 and Contactin-2 have come to be known as the principal molecules in the function and maintenance of myelinated neurons. In contrast; the function of the other four members of this subgroup remained unknown until recently. Contactin-3; also known as CNTN3 ( BIG-1 in rat and PANG in mouse ); is a GPI-linked glycoprotein that is expressed on cerebellar Purkinje cells; amygdaloid and thalamic neurons and olfactory granule cells. In the brain; Contactin-3 is expressed in frontal lobe; occipital lobe; cerebellum and amygdala. Contactin-3 contains 4 fibronectin type-III domains and 6 Ig-like C2-type (immunoglobulin-like) domains. Human Contactin-3 shares 92% aa identity with mouse Contactin-3.The exact function of Contactin-3 is unclear. Contactin-3 may mediate cell-cell interaction and may promote neurite outgrowth.
Product Name:
Human Contactin 3/CNTN3 Recombinant Protein (RPES0965)
Product Code:
RPES0965
Size:
100 µg
Species:
Human
Expressed Host:
HEK293 Cells
Synonyms:
BIG-1,PANG,PCS
Accession:
NP_065923.1
Sequence:
Met 1-Ser1002; 708 Asp/Asn
Fusion tag:
C-His
Activity:
Measured by the ability of the immobilized protein to support the adhesion of C6 Rat brain glial cells. When 5 x 10E4 cells/well are added to CNTN3 coated plates (0.8 µg/ml and 100 ?l/well); approximately 35%-55% will adhere specifically after 60 minutes at 37?.
Endotoxin:
<1.0 EU per µg as determined by the LAL method.
Protein Construction:
A DNA sequence encoding the human CNTN3 (NP_065923.1) (Met 1-Ser1002; 708 Asp/Asn) precursor was expressed with a C-terminal polyhistidine tag.
Purity:
> 97 % as determined by reducing SDS-PAGE.
Mol Mass:
109.2 kDa
AP Mol Mass:
120-130 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.
