tetano
Editor, Senior Moderator
Viruses. 2016 Sep 13;8(9). pii: E247. doi: 10.3390/v8090247.
[h=1]Binding of RNA by the Nucleoproteins of Influenza Viruses A and B.[/h] Labaronne A[SUP]1[/SUP], Swale C[SUP]2,[/SUP][SUP]3[/SUP], Monod A[SUP]4[/SUP], Schoehn G[SUP]5[/SUP], Cr?pin T[SUP]6[/SUP], Ruigrok RW[SUP]7[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] This paper describes a biochemical study for making complexes between the nucleoprotein of influenza viruses A and B (A/NP and B/NP) and small RNAs (polyUC RNAs from 5 to 24 nucleotides (nt)), starting from monomeric proteins. We used negative stain electron microscopy, size exclusion chromatography-multi-angle laser light scattering (SEC-MALLS) analysis, and fluorescence anisotropy measurements to show how the NP-RNA complexes evolve. Both proteins make small oligomers with 24-nt RNAs, trimers for A/NP, and dimers, tetramers, and larger complexes for B/NP. With shorter RNAs, the affinities of NP are all in the same range at 50 mM NaCl, showing that the RNAs bind on the same site. The affinity of B/NP for a 24-nt RNA does not change with salt. However, the affinity of A/NP for a 24-nt RNA is lower at 150 and 300 mM NaCl, suggesting that the RNA binds to another site, either on the same protomer or on a neighbour protomer. For our fluorescence anisotropy experiments, we used 6-fluorescein amidite (FAM)-labelled RNAs. By using a (UC)₆-FAM(3') RNA with 150 mM NaCl, we observed an interesting phenomenon that gives macromolecular complexes similar to the ribonucleoprotein particles purified from the viruses.
[h=4]KEYWORDS:[/h] RNA; assembly; influenza virus; nucleoprotein; oligomerization; ribonucleoprotein
PMID: 27649229 DOI: 10.3390/v8090247
[PubMed - in process] Free full text
[h=1]Binding of RNA by the Nucleoproteins of Influenza Viruses A and B.[/h] Labaronne A[SUP]1[/SUP], Swale C[SUP]2,[/SUP][SUP]3[/SUP], Monod A[SUP]4[/SUP], Schoehn G[SUP]5[/SUP], Cr?pin T[SUP]6[/SUP], Ruigrok RW[SUP]7[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] This paper describes a biochemical study for making complexes between the nucleoprotein of influenza viruses A and B (A/NP and B/NP) and small RNAs (polyUC RNAs from 5 to 24 nucleotides (nt)), starting from monomeric proteins. We used negative stain electron microscopy, size exclusion chromatography-multi-angle laser light scattering (SEC-MALLS) analysis, and fluorescence anisotropy measurements to show how the NP-RNA complexes evolve. Both proteins make small oligomers with 24-nt RNAs, trimers for A/NP, and dimers, tetramers, and larger complexes for B/NP. With shorter RNAs, the affinities of NP are all in the same range at 50 mM NaCl, showing that the RNAs bind on the same site. The affinity of B/NP for a 24-nt RNA does not change with salt. However, the affinity of A/NP for a 24-nt RNA is lower at 150 and 300 mM NaCl, suggesting that the RNA binds to another site, either on the same protomer or on a neighbour protomer. For our fluorescence anisotropy experiments, we used 6-fluorescein amidite (FAM)-labelled RNAs. By using a (UC)₆-FAM(3') RNA with 150 mM NaCl, we observed an interesting phenomenon that gives macromolecular complexes similar to the ribonucleoprotein particles purified from the viruses.
[h=4]KEYWORDS:[/h] RNA; assembly; influenza virus; nucleoprotein; oligomerization; ribonucleoprotein
PMID: 27649229 DOI: 10.3390/v8090247
[PubMed - in process] Free full text