Matsuda, A.* ; Plewka, J.* ; Rawski, M.* ; Mourao, A. ; Zajko, W.* ; Siebenmorgen, T. ; Kresik, L.* ; Lis, K.* ; Jones, A. ; Pachota, M.* ; Karim, A.* ; Hartman, K.* ; Nirwal, S.* ; Sonani, R.* ; Chykunova, Y.* ; Minia, I.* ; Mak, P.* ; Landthaler, M.* ; Nowotny, M.* ; Dubin, G.* ; Sattler, M. ; Suder, P.* ; Popowicz, G.M. ; Pyrc, K.* ; Czarna, A.*
     
    
        
Despite the odds: Formation of the SARS-CoV-2 methylation complex.
    
    
        
    
    
        
        Nucleic Acids Res. 52, 6441-6458 (2024)
    
    
    
      
      
	
	    Coronaviruses modify their single-stranded RNA genome with a methylated cap during replication to mimic the eukaryotic mRNAs. The capping process is initiated by several nonstructural proteins (nsp) encoded in the viral genome. The methylation is performed by two methyltransferases, nsp14 and nsp16, while nsp10 acts as a co-factor to both. Additionally, nsp14 carries an exonuclease domain which operates in the proofreading system during RNA replication of the viral genome. Both nsp14 and nsp16 were reported to independently bind nsp10, but the available structural information suggests that the concomitant interaction between these three proteins would be impossible due to steric clashes. Here, we show that nsp14, nsp10, and nsp16 can form a heterotrimer complex upon significant allosteric change. This interaction is expected to encourage the formation of mature capped viral mRNA, modulating nsp14's exonuclease activity, and protecting the viral RNA. Our findings show that nsp14 is amenable to allosteric regulation and may serve as a novel target for therapeutic approaches.
	
	
	    
	
       
      
	
	    
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        Publication type
        Article: Journal article
    
 
    
        Document type
        Scientific Article
    
 
    
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        Keywords
        Structural Basis; Protein; Exoribonuclease; Replication; Reveals; Nsp14; Domain
    
 
    
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        Language
        english
    
 
    
        Publication Year
        2024
    
 
    
        Prepublished in Year
        0
    
 
    
        HGF-reported in Year
        2024
    
 
    
    
        ISSN (print) / ISBN
        0305-1048
    
 
    
        e-ISSN
        1362-4962
    
 
    
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	    Volume: 52,  
	    Issue: 11,  
	    Pages: 6441-6458 
	    Article Number: ,  
	    Supplement: ,  
	
    
 
    
        
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            Publisher
            Oxford University Press
        
 
        
            Publishing Place
            Great Clarendon St, Oxford Ox2 6dp, England
        
 
	
        
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        Reviewing status
        Peer reviewed
    
 
     
    
        POF-Topic(s)
        30203 - Molecular Targets and Therapies
    
 
    
        Research field(s)
        Enabling and Novel Technologies
    
 
    
        PSP Element(s)
        G-503000-001
    
 
    
        Grants
        Jagiellonian University in Krakow
    
 
    
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        Erfassungsdatum
        2024-05-03