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© Research
Publication : Biomolecules

A Structural and Dynamic Analysis of the Partially Disordered Polymerase-Binding Domain in RSV Phosphoprotein.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Biomolecules - 17 Aug 2021

Cardone C, Caseau CM, Bardiaux B, Thureaux A, Galloux M, Bajorek M, Eléouët JF, Litaudon M, Bontems F, Sizun C,

Link to Pubmed [PMID] – 34439894

Link to DOI – 122510.3390/biom11081225

Biomolecules 2021 Aug; 11(8):

The phosphoprotein P of Mononegavirales (MNV) is an essential co-factor of the viral RNA polymerase L. Its prime function is to recruit L to the ribonucleocapsid composed of the viral genome encapsidated by the nucleoprotein N. MNV phosphoproteins often contain a high degree of disorder. In Pneumoviridae phosphoproteins, the only domain with well-defined structure is a small oligomerization domain (POD). We previously characterized the differential disorder in respiratory syncytial virus (RSV) phosphoprotein by NMR. We showed that outside of RSV POD, the intrinsically disordered N-and C-terminal regions displayed a structural and dynamic diversity ranging from random coil to high helical propensity. Here we provide additional insight into the dynamic behavior of PCα, a domain that is C-terminal to POD and constitutes the RSV L-binding region together with POD. By using small phosphoprotein fragments centered on or adjacent to POD, we obtained a structural picture of the POD-PCα region in solution, at the single residue level by NMR and at lower resolution by complementary biophysical methods. We probed POD-PCα inter-domain contacts and showed that small molecules were able to modify the dynamics of PCα. These structural properties are fundamental to the peculiar binding mode of RSV phosphoprotein to L, where each of the four protomers binds to L in a different way.

https://pubmed.ncbi.nlm.nih.gov/34439894