Recombinant Influenza A H3N2 (A/Hong Kong/1/1968) Nucleoprotein / NP Protein (His Tag)

Name: Recombinant Influenza A H3N2 (A/Hong Kong/1/1968) Nucleoprotein / NP Protein (His Tag)
Brand: Beta LifeScience
SKU: BLPSN-5138
Availability: InStock

Collections: Featured viral antigens molecules, Influenza a/b antigen, Recombinant proteins, Viral antigen

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Product Overview

Tag	His
Host Species	Influenza A H3N2
Accession	P22435
Description	The Influenza A virus (A/Hong Kong/1/1968(H3N2)) nucleoprotein (P22435.2) (Met1-Asn498) was produced with a C-terminal His tag.
Source	Insect Cells
Predicted N Terminal	Met
AA Sequence	Met1-Asn498
Molecular Weight	The recombinant nucleoprotein of Influenza A virus (A/Hong Kong/1/1968(H3N2)) comprises 509 amino acids and has a predicted molecular mass of 57.5 kDa. The apparent molecular mass of the protein is approximately 59.9 kDa in SDS-PAGE under reducing conditions.
Purity	Greater than 85% as determined by SDS-PAGE
Endotoxin	< 1.0 EU per μg of the protein as determined by the LAL method
Formulation	This product was lyophilized from sterile 20 mM Tris, 500 mM NaCl, 10 % glycerol, pH 8.0.
Stability	Recombinant antigens are stable for up to 1 year from date of receipt at -80°C
Applications	ELISA; immunogen; WB, etc.
Usage	For Research Use Only
Storage	Store it under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Please avoid repeated freeze-thaw cycles.

Target Details

Target Function	Encapsidates the negative strand viral RNA, protecting it from nucleases. The encapsidated genomic RNA is termed the ribonucleoprotein (RNP) and serves as template for transcription and replication. The RNP needs to be localized in the host nucleus to start an infectious cycle, but is too large to diffuse through the nuclear pore complex. NP comprises at least 2 nuclear localization signals that are responsible for the active RNP import into the nucleus through cellular importin alpha/beta pathway. Later in the infection, nclear export of RNPs are mediated through viral proteins NEP interacting with M1 which binds nucleoproteins. It is possible that nucleoprotein binds directly host exportin-1/XPO1 and plays an active role in RNPs nuclear export. M1 interaction with RNP seems to hide nucleoprotein's nuclear localization signals. Soon after a virion infects a new cell, M1 dissociates from the RNP under acidification of the virion driven by M2 protein. Dissociation of M1 from RNP unmasks nucleoprotein's nuclear localization signals, targeting the RNP to the nucleus.
Subcellular Location	Virion. Host nucleus.
Protein Families	Influenza viruses nucleoprotein family

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.