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TitleThe structure of native influenza virion ribonucleoproteins.
Journal, issue, pagesScience, Vol. 338, Issue 6114, Page 1634-1637, Year 2012
Publish dateDec 21, 2012
AuthorsRocío Arranz / Rocío Coloma / Francisco Javier Chichón / José Javier Conesa / José L Carrascosa / José M Valpuesta / Juan Ortín / Jaime Martín-Benito /
PubMed AbstractThe influenza viruses cause annual epidemics of respiratory disease and occasional pandemics, which constitute a major public-health issue. The segmented negative-stranded RNAs are associated with ...The influenza viruses cause annual epidemics of respiratory disease and occasional pandemics, which constitute a major public-health issue. The segmented negative-stranded RNAs are associated with the polymerase complex and nucleoprotein (NP), forming ribonucleoproteins (RNPs), which are responsible for virus transcription and replication. We describe the structure of native RNPs derived from virions. They show a double-helical conformation in which two NP strands of opposite polarity are associated with each other along the helix. Both strands are connected by a short loop at one end of the particle and interact with the polymerase complex at the other end. This structure will be relevant for unraveling the mechanisms of nuclear import of parental virus RNPs, their transcription and replication, and the encapsidation of progeny RNPs into virions.
External linksScience / PubMed:23180776
MethodsEM (helical sym.) / EM (single particle)
Resolution18.0 - 27.0 Å
Structure data

2205

4bbl

EMDB-2205, PDB-4bbl:
Cryo-electron microscopy reconstruction of the helical part of influenza A virus ribonucleoprotein isolated from virions.
Method: EM (helical sym.) / Resolution: 18.0 Å

EMDB-2206:
Negative stained electron microscopy reconstruction of the loop of influenza A virus ribonucleoprotein isolated from virions.
Method: EM (single particle) / Resolution: 27.0 Å

EMDB-2207:
Negative stained electron microscopy reconstruction of the viral polymerase of influenza A virus ribonucleoprotein isolated from virions. Conformation 1.
Method: EM (single particle) / Resolution: 20.0 Å

EMDB-2208:
Negative stained electron microscopy reconstruction of the viral polymerase of influenza A virus ribonucleoprotein isolated from virions. Conformation 2.
Method: EM (single particle) / Resolution: 21.7 Å

Source
  • influenza a virus
KeywordsNUCLEAR PROTEIN / NUCLEOCAPSID

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