8FRK

Structure of nsp14 N7-MethylTransferase domain fused with TELSAM bound to SGC8158


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.61 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.219 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Structures of SARS-CoV-2 N7-methyltransferase with DOT1L and PRMT7 inhibitors provide a platform for new antivirals.

Kottur, J.White, K.M.Rodriguez, M.L.Rechkoblit, O.Quintana-Feliciano, R.Nayar, A.Garcia-Sastre, A.Aggarwal, A.K.

(2023) PLoS Pathog 19: e1011546-e1011546

  • DOI: https://doi.org/10.1371/journal.ppat.1011546
  • Primary Citation of Related Structures:  
    8FRJ, 8FRK

  • PubMed Abstract: 

    The RNA N7-methyltransferase (MTase) activity of SARS-CoV-2's nsp14 protein is essential for viral replication and is a target for the development of new antivirals. Nsp14 uses S-adenosyl methionine (SAM) as the methyl donor to cap the 5' end of the SARS-CoV-2 mRNA and generates S-adenosyl homocysteine (SAH) as the reaction byproduct. Due to the central role of histone MTases in cancer, many SAM/SAH analogs with properties of cell permeability have recently been developed for the inhibition of these MTases. We have succeeded in identifying two such compounds (SGC0946 and SGC8158) that display significant antiviral activity and bind to the SARS-CoV-2 nsp14 N7-MTase core. Unexpectedly, crystal structures of SGC0946 and SGC8158 with the SARS-CoV-2 nsp14 N7-MTase core identify them as bi-substrate inhibitors of the viral MTase, co-occupying both the SAM and RNA binding sites; positing novel features that can be derivatized for increased potency and selectivity for SARS-CoV-2 nsp14. Taken together, the high-resolution structures and the accompanying biophysical and viral replication data provide a new avenue for developing analogs of SGC0946 and SGC8158 as antivirals.


  • Organizational Affiliation

    Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transcription factor ETV6,Guanine-N7 methyltransferase nsp14 chimera309Severe acute respiratory syndrome coronavirus 2Mutation(s): 3 
Gene Names: ETV6TELTEL1rep1a-1b
EC: 2.1.1.56 (PDB Primary Data), 3.1.13 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P41212 (Homo sapiens)
Explore P41212 
Go to UniProtKB:  P41212
PHAROS:  P41212
GTEx:  ENSG00000139083 
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTD1 
Go to UniProtKB:  P0DTD1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP0DTD1P41212
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.61 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.219 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.174α = 90
b = 109.174β = 90
c = 48.659γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
STARANISOdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2023-07-26
    Type: Initial release
  • Version 1.1: 2023-09-27
    Changes: Data collection, Database references