Recombinant Human Contactin-Associated Protein 1 (CNTNAP1) Protein (His-SUMO)

Name: Recombinant Human Contactin-Associated Protein 1 (CNTNAP1) Protein (His-SUMO)
Brand: Beta LifeScience
SKU: BLC-09807P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

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Product Overview

Description	Recombinant Human Contactin-Associated Protein 1 (CNTNAP1) Protein (His-SUMO) is produced by our E.coli expression system. This is a protein fragment.
Purity	Greater than 90% as determined by SDS-PAGE.
Uniprotkb	P78357
Target Symbol	CNTNAP1
Synonyms	Caspr; Caspr1; CNTNAP; Cntnap1; CNTP1_HUMAN; Contactin associated protein 1; Contactin-associated protein 1; MHDNIV; NCP1; Neurexin 4; Neurexin IV; Neurexin-4; Nrxn4; p190; Paranodin
Species	Homo sapiens (Human)
Expression System	E.coli
Tag	N-6His-SUMO
Target Protein Sequence	DEELVGPLYARSLGASSYYSLLTAPRFARLHGISGWSPRIGDPNPWLQIDLMKKHRIRAVATQGSFNSWDWVTRYMLLYGDRVDSWTPFYQRGHNSTFFGNVNESAVVRHDLHFHFTARYIRIVPLAWNPRGKIGLRLGLYGCPYKADILYFDGDDAISYRFPRGVSRSLWDVFAFSFKTEEKDGLLLHAEGAQGDYVTLELEGAHLLLHMSLGSSPIQPRPGHTTVSAGGVLNDQHWHYVRVDRFGRDVNFTLDGYVQRFILNGDFERLNLDTEMFIGGLVGAARKNLAYRHNFRGCIENVIFNRVNIADLAVRRHSRITFEGKVAFRCL
Expression Range	26-356aa
Protein Length	Partial
Mol. Weight	53.8kDa
Research Area	Neuroscience
Form	Liquid or Lyophilized powder
Buffer	Liquid form: default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution	Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%.
Storage	1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C.
Notes	Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Target Details

Target Function	Required, with CNTNAP2, for radial and longitudinal organization of myelinated axons. Plays a role in the formation of functional distinct domains critical for saltatory conduction of nerve impulses in myelinated nerve fibers. Demarcates the paranodal region of the axo-glial junction. In association with contactin involved in the signaling between axons and myelinating glial cells.
Subcellular Location	Membrane; Single-pass type I membrane protein. Cell junction, paranodal septate junction.
Protein Families	Neurexin family
Database References	HGNC: 8011 OMIM: 602346 KEGG: hsa:8506 STRING: 9606.ENSP00000264638 UniGene: Hs.408730
Associated Diseases	Lethal congenital contracture syndrome 7 (LCCS7)
Tissue Specificity	Predominantly expressed in brain. Weak expression detected in ovary, pancreas, colon, lung, heart, intestine and testis.

Gene Functions References

E. coli exploits Caspr1 as a host receptor for penetration of the blood-brain barrier, resulting in meningitis PMID: 29895952
In two brothers with severe congenital hypotonia and foot deformities, we identified compound heterozygous variants in CNTNAP1, reporting the first causative missense variant, p.(Cys323Arg). Motor nerve conductions were markedly decreased. PMID: 27782105
CNTNAP1 mutations were found to induce characteristic ultrastructural lesions of the paranodal region. PMID: 27818385
report a consanguineous Arab family from Qatar with three children having an early lethal form of arthrogryposis multiplex congenita and a novel frameshift mutation in CNTNAP1 PMID: 28254648
Mutations in CNTNAP1 and ADCY6 are responsible for severe arthrogryposis multiplex congenita with axoglial defects PMID: 24319099

FAQs

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.