Download MendeleySnapshots of ADP-ribose bound to Getah virus macro domain reveal an intriguing choreography.
Ferreira-Ramos, A.S., Sulzenbacher, G., Canard, B., Coutard, B.(2020) Sci Rep 10: 14422-14422
- PubMed: 32879358
- DOI: https://doi.org/10.1038/s41598-020-70870-w
- Primary Citation of Related Structures:
6QZU, 6R0F, 6R0G, 6R0P, 6R0R, 6R0T - PubMed Abstract:
Alphaviruses are (re-)emerging arboviruses of public health concern. The nsP3 gene product is one of the key players during viral replication. NsP3 comprises three domains: a macro domain, a zinc-binding domain and a hypervariable region. The macro domain is essential at both early and late stages of the replication cycle through ADP-ribose (ADPr) binding and de-ADP-ribosylation of host proteins. However, both its specific role and the precise molecular mechanism of de-ADP-ribosylation across specific viral families remains to be elucidated. Here we investigate by X-ray crystallography the mechanism of ADPr reactivity in the active site of Getah virus macro domain, which displays a peculiar substitution of one of the conserved residues in the catalytic loop. ADPr adopts distinct poses including a covalent bond between the C''1 of the ADPr and a conserved Togaviridae-specific cysteine. These different poses observed for ADPr may represent snapshots of the de-ADP-ribosylation mechanism, highlighting residues to be further characterised.
Organizational Affiliation:
Architecture et Fonction des Macromolécules Biologiques, CNRS, Aix-Marseille Université, 13288, Marseille, France.
