Nucleoprotein - Q9QP77 (NCAP_EBOSB)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

Oligomerizes into helical capsid to encapsidate the viral genome, protecting it from nucleases and the cellular innate immune response. VP35 binds to and stabilizes monomeric NP, keeping it soluble. Upon virus replication, NP is recruited to bind cooperatively viral genomic RNA and VP35 is released. The encapsidated genomic RNA is termed the nucleocapsid and serves as template for transcription and replication. The nucleocapsid is helical with a pitch of 10.81 NP per turn and a diameter of about 22nm. Each NP binds to six nucleotides of viral genomic RNA, three being exposed to the solvant and three hidden into the nucleocapsid. Recruits also host PPP2R5C phosphatase to dephosphorylate VP30 and thereby promote viral transcription. Upon virion assembly and budding, NP binds to VP24 and possibly host STAU1. UniProt
Pathway Maps
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Subunit Structure
Homooligomer. Homomultimerizes to form the nucleocapsid. Binds to viral genomic RNA. Interacts with VP35 and VP30 to form the nucleocapsid. Interacts with host PPP2R5C; this interaction leads to VP30 dephosphorylation and viral transcription. Interacts with VP24; this interaction facilitates nucleocapsid assembly and genome packaging. Interacts with matrix protein VP40; this interaction allows recruitment of the nucleocapsid into progeny virions. Interacts with host STAU1. UniProt
Comprizes a N-terminal arm involved in oligomerization, a NP core region involved in RNA binding, a disordered region follwoed by a C-terminal tail involved in protein-protein interactions. During oligomerization, NP N-terminal arm binds to a neighbor NP thereby displacing VP35 bound to monomeric NP. UniProt
  • Other Gene names: NP
This protein in other organisms (by gene name):
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Data in green originates from UniProtKB  
Variation data (sourced from UniProt) shows non-genetic variation from the ExPASy   and dbSNP   websites.
Data in yellow originates from Pfam  , by interacting with the HMMER3 web site  
Data in purple originates from Phosphosite  .
Data in orange originates from the SCOP   (version 1.75) and SCOPe   (version 2.04) classifications.
Data in grey has been calculated using BioJava  . Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  
  • Red: potentially disorderd region
  • Blue: probably ordered region.
Hydropathy has been calculated using a sliding window of 15 residues and summing up scores from standard hydrophobicity tables.
  • Red: hydrophobic
  • Blue: hydrophilic.
Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
Data in blue originates from PDB
  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
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Validation Track

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Data in red indicates combined ranges of Homology Models from the SWISS-MODEL Repository  
The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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