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Details on Person The function of the non-structural protein nsp16 as a 2'O-me...
| Class:Id | Summation:9694379 |
|---|---|
| _displayName | The function of the non-structural protein nsp16 as a 2'O-me... |
| _timestamp | 2022-02-15 09:24:00 |
| created | [InstanceEdit:9694660] Cook, Justin, 2020-07-07 |
| literatureReference | [LiteratureReference:9684039] Coronavirus nonstructural protein 16 is a cap-0 binding enzyme possessing (nucleoside-2'O)-methyltransferase activity [LiteratureReference:9685392] Comparative analysis of RNA genomes of mouse hepatitis viruses [LiteratureReference:9685391] Discontinuous and non-discontinuous subgenomic RNA transcription in a nidovirus [LiteratureReference:9684462] Attenuation and restoration of severe acute respiratory syndrome coronavirus mutant lacking 2'-o-methyltransferase activity [LiteratureReference:9683422] In vitro reconstitution of SARS-coronavirus mRNA cap methylation [LiteratureReference:9684045] Crystal structure and functional analysis of the SARS-coronavirus RNA cap 2'-O-methyltransferase nsp10/nsp16 complex |
| modified | [InstanceEdit:9696950] Orlic-Milacic, Marija, 2020-07-30 [InstanceEdit:9763854] Stephan, Ralf, 2022-02-06 [InstanceEdit:9763957] Stephan, Ralf, 2022-02-08 [InstanceEdit:9765248] Stephan, Ralf, 2022-02-15 |
| text | The function of the non-structural protein nsp16 as a 2'O-methyltransferase that acts in complex with its co-activator nsp10 is conserved in SARS-CoV-2 (Viswanathan et al. 2020). The genomic and subgenomic mRNAs of SARS-CoV-2 coronavirus, including the minus strand genomic RNA, are presumed to be capped at their 5′ end, based on studies of the mouse hepatitis virus (MHV) (Lai and Stohlman 1981) and the equine torovirus (van Vliet et al. 2002). 2'-O methylation of Cap-0 by SARS-CoV-2 nsp10/nsp16 has been shown, and the process is dependent on the presence of divalent metal cations (Wilamowski et al, 2021; Benoni et al, 2021; Minasov et al, 2021; Viswanathan et al, 2021). Non-structural protein 16 (nsp16) acts as a 2'O-methyltransferase that converts coronavirus cap-0 to cap-1, which was first demonstrated with nsp16 cloned from the feline coronavirus (FCV) (Decroly et al. 2008). Cap-0 represents N7-methyl guanosine connected to the 5′ nucleotide through a 5′ to 5′ triphosphate linkage (also known as m7G cap or m7Gppp cap). Cap-1 is generated by an additional methylation on the 2′O position of the initiating nucleotide, and is also known as m7GpppNm. Non-structural protein 10 (nsp10) acts as an activator of nsp16 and is necessary for cap-1 synthesis (Bouvet et al. 2010, Decroly et al. 2011). Coronavirus RNAs with cap-1 are protected from IFIT-mediated interferon response. IFITs are interferon-induced proteins with tetratricopeptide repeats that recognize unmethylated 2'-O RNAs and act to inhibit expression of virally encoded mRNAs (Menachery et al. 2014). |
| (summation) | [Reaction:9694521] nsp16 acts as a cap 2'-O-methyltransferase to modify SARS-CoV-2 gRNA complement (minus strand) [Homo sapiens] |
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