Nucleocapsid/NP Protein, H7N9 (AHZ59787, sf9, His)

Nucleocapsid protein in many coronaviruses is highly conserved, immunogenic, and abundantly expressed during infection. Nucleocapsid/NP Protein, H7N9 (AHZ59787, sf9, His) is the recombinant Virus-derived Nucleocapsid/NP protein, expressed by Sf9 insect cells , with C-His labeled tag. The total length of Nucleocapsid/NP Protein, H7N9 (AHZ59787, sf9, His) is 498 a.a., with molecular weight of ~55 kDa.

NP 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^[1].

Virus

Sf9 insect cells

C-His

AHZ59787 (M1-N498)

/

Approximately 55 kDa

Greater than 95% as determined by reducing SDS-PAGE

<1 EU/μg, determined by LAL method.