investigating the mechanism of action of sars-cov-2 virus for drug designing

coronavirus disease 2019 (covid19) is a viral pneumonia emerged in december 2019 in wuhan, china. its cause is a new virus from the coronavirus family scientifically named coronavirus acute respiratory syndrome 2 (sarscov2). in this review study, articles published in english until march 23, 2020 on new coronavirus infection were reviewed. these articles are obtained by searching in pubmed, scopus and google scholar databases using keywords sarscov2 , covid19 and coronavirus . the latest covid19 statistics and information were extracted from the websites of world health organization and the centers for disease control and prevention. we investigated the effect of different compounds on the key macromolecules in promoting sarscov2 infection using computational methods and bioinformatics analysis that can be considered as the best targets for designing inhibitory drugs. the most important macromolecules were angiotensin converting enzyme 2 (ace2) and transmembrane protease serine 2 (tmprss2) receptors of the host cell surface and the structural and nonstructural proteins of the virus. the most important structural protein was spike, playing an important role in binding the virus to the ace2 receptor of the host cell and the entery of the virus genome into it, while the key nonstructural proteins were 3chymotrypsin like protease (3clpro), rna-dependent rna polymerase (rdrp), papainlike cysteine proteinase (plpro), and nonstructural protein 13 (nsp13) helicase which are involved in viral genome replication and the virus rsquo; release from the host cell.