doi: 10.1016/s0092-8674(03)00424-0.
mRNA cap-1 methyltransferase in the SARS genome
- PMID: 12809601
- PMCID: PMC7126025
- DOI: 10.1016/s0092-8674(03)00424-0
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mRNA cap-1 methyltransferase in the SARS genome
Cell.
.
Abstract
The 3D jury system has predicted the methyltransferase fold for the nsp13 protein of the SARS coronavirus. Based on the conservation of a characteristic tetrad of residues, the mRNA cap-1 methyltransferase function has been assigned to this protein, which has potential implications for antiviral therapy.
Figures
3D Model of the nsp13 Domain of the SARS Coronavirus pp1ab Polyprotein This model is based on the reassigned (Bujnicki and Rychlewski, 2001) cap-1 methyltransferase of the reovirus λ2 protein (1ej6 [Reinisch et al., 2000]). While other templates (1eiz or 1ej0) obtained marginally higher 3D jury scores, the selected template had the lowest number of insertions and deletions. Side chains of the conserved tetrad of residues (K-D-K-E) essential for cap-1 methylation and the docked AdoMet cofactor are shown. Four blocks of aligned motifs containing the conserved, function-specific residues are shown in upper right corner.
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