CovidV2, Main, Exploration, bibRecord, 000A82

COVID-2019: The role of the nsp2 and nsp3 in its pathogenesis.

Identifieur interne : 000A82 ( Main/Exploration ); précédent : 000A81; suivant : 000A83

COVID-2019: The role of the nsp2 and nsp3 in its pathogenesis.

Auteurs : Silvia Angeletti [Italie] ; Domenico Benvenuto [Italie] ; Martina Bianchi [Italie] ; Marta Giovanetti [Brésil] ; Stefano Pascarella [Italie] ; Massimo Ciccozzi [Italie]

Source :

Journal of medical virology [ 1096-9071 ] ; 2020.

RBID : pubmed:32083328

Abstract

Last December 2019, a new virus, named novel Coronavirus (COVID-2019) causing many cases of severe pneumonia was reported in Wuhan, China. The virus knowledge is limited and especially about COVID-2019 pathogenesis. The Open Reading Frame 1ab (ORF1ab) of COVID-2019 has been analyzed to evidence the presence of mutation caused by selective pressure on the virus. For selective pressure analysis fast-unconstrained Bayesian approximation (FUBAR) was used. Homology modelling has been performed by SwissModel and HHPred servers. The presence of transmembrane helical segments in Coronavirus ORF1ab non structural protein 2 (nsp2) and nsp3 was tested by TMHMM, MEMSAT, and MEMPACK tools. Three-dimensional structures have been analyzed and displayed using PyMOL. FUBAR analysis revealed the presence of potential sites under positive selective pressure (P < .05). Position 723 in the COVID-2019 has a serine instead a glycine residue, while at aminoacidic position 1010 a proline instead an isoleucine. Significant (P < .05) pervasive negative selection in 2416 sites (55%) was found. The positive selective pressure could account for some clinical features of this virus compared with severe acute respiratory syndrome (SARS) and Bat SARS-like CoV. The stabilizing mutation falling in the endosome-associated-protein-like domain of the nsp2 protein could account for COVID-2019 high ability of contagious, while the destabilizing mutation in nsp3 proteins could suggest a potential mechanism differentiating COVID-2019 from SARS. These data could be helpful for further investigation aimed to identify potential therapeutic targets or vaccine strategy, especially in the actual moment when the epidemic is ongoing and the scientific community is trying to enrich knowledge about this new viral pathogen.

DOI: 10.1002/jmv.25719
PubMed: 32083328

Affiliations:

Le document en format XML

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COVID-2019: The role of the nsp2 and nsp3 in its pathogenesis.

COVID-2019: The role of the nsp2 and nsp3 in its pathogenesis.

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Abstract

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