Crystal Structure of Non-Structural Protein 10 from Severe Acute Respiratory Syndrome Coronavirus-2.

Rogstam A, Nyblom M, Christensen S, Sele C, Talibov VO, Lindvall T, Rasmussen AA, André I, Fisher Z, Knecht W, Kozielski F

Int J Mol Sci 21 (19) - [2020-10-06; online 2020-10-06]

Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2), causing Coronavirus Disease 19 (COVID-19), emerged at the end of 2019 and quickly spread to cause a global pandemic with severe socio-economic consequences. The early sequencing of its RNA genome revealed its high similarity to SARS, likely to have originated from bats. The SARS-CoV-2 non-structural protein 10 (nsp10) displays high sequence similarity with its SARS homologue, which binds to and stimulates the 3'-to-5' exoribonuclease and the 2'-O-methlytransferase activities of nsps 14 and 16, respectively. Here, we report the biophysical characterization and 1.6 Å resolution structure of the unbound form of nsp10 from SARS-CoV-2 and compare it to the structures of its SARS homologue and the complex-bound form with nsp16 from SARS-CoV-2. The crystal structure and solution behaviour of nsp10 will not only form the basis for understanding the role of SARS-CoV-2 nsp10 as a central player of the viral RNA capping apparatus, but will also serve as a basis for the development of inhibitors of nsp10, interfering with crucial functions of the replication-transcription complex and virus replication.

Category: Proteins

Type: Journal article

PubMed 33036230

DOI 10.3390/ijms21197375

Crossref 10.3390/ijms21197375

PDB: 6ZPE Nonstructural protein 10 (nsp10) from SARS CoV-2, 1.58Å resolution
PDB: 6ZCT Nonstructural protein 10 (nsp10) from SARS CoV-2, 2.55Å resolution
Supplementary materials

Publications 9.5.0