Ebola virus nucleoprotein (NP)

The Ebola virus nucleoprotein (NP) is a 739-amino acid structural protein essential for the life cycle of the Ebola virus [1, 7]. It functions by encapsidating the viral negative-sense RNA genome, protecting it from host cell nucleases and the innate immune system [2, 6]. This encapsidation forms the helical nucleocapsid, which serves as the necessary template for viral transcription and replication by the polymerase complex [2, 16]. NP interacts with several other viral proteins, including VP35, VP30, and VP24, to coordinate the assembly of the ribonucleoprotein complex [2, 7]. It also recruits host factors such as NXF1 and protein phosphatase 1 (PP1) to facilitate viral protein expression and regulate capsid formation [19, 20]. In the context of disease, NP is a primary target for diagnostic tools, including RT-PCR and rapid antigen tests, due to its abundance during infection [8, 10]. Although most currently approved Ebola therapies target the surface glycoprotein, NP is a high-priority target for the development of small-molecule antivirals [3, 9]. Experimental compounds like MCCB4 and 1E7-03 have demonstrated the potential to inhibit viral replication by disrupting NP's structural or regulatory functions [3, 20]. However, challenges such as the high mutation rate of RNA viruses and the need for effective cytoplasmic delivery remain significant hurdles in drug development [16, 17].

Other names

NucleoproteinNucleocapsid proteinProtein NEBOV NP

Inhibition of RNA encapsidation, disruption of NP-NP oligomerization, and interference with NP-VP35 or NP-host protein interactions [3, 6, 20].