7LW3

Structure of SARS-CoV-2 nsp16/nsp10 complex in presence of Cap-1 analog (m7GpppAmU) and SAH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

A metal ion orients SARS-CoV-2 mRNA to ensure accurate 2'-O methylation of its first nucleotide.

Viswanathan, T.Misra, A.Chan, S.H.Qi, S.Dai, N.Arya, S.Martinez-Sobrido, L.Gupta, Y.K.

(2021) Nat Commun 12: 3287-3287

  • DOI: https://doi.org/10.1038/s41467-021-23594-y
  • Primary Citation of Related Structures:  
    7LW3, 7LW4

  • PubMed Abstract: 

    The SARS-CoV-2 nsp16/nsp10 enzyme complex modifies the 2'-OH of the first transcribed nucleotide of the viral mRNA by covalently attaching a methyl group to it. The 2'-O methylation of the first nucleotide converts the status of mRNA cap from Cap-0 to Cap-1, and thus, helps the virus evade immune surveillance in host cells. Here, we report two structures of nsp16/nsp10 representing pre- and post-release states of the RNA product (Cap-1). We observe overall widening of the enzyme upon product formation, and an inward twisting motion in the substrate binding region upon product release. These conformational changes reset the enzyme for the next round of catalysis. The structures also identify a unique binding mode and the importance of a divalent metal ion for 2'-O methylation. We also describe underlying structural basis for the perturbed enzymatic activity of a clinical variant of SARS-CoV-2, and a previous SARS-CoV outbreak strain.


  • Organizational Affiliation

    Greehey Children's Cancer Research Institute, University of Texas Health at San Antonio, San Antonio, TX, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
2'-O-methyltransferase298Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: rep1a-1b
EC: 2.1.1
UniProt
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 GroupP0DTD1
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Non-structural protein 10139Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: rep1a-1b
UniProt
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 GroupP0DTD1
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
YG4 (Subject of Investigation/LOI)
Query on YG4

Download Ideal Coordinates CCD File 
F [auth A][(2~{R},3~{R},4~{R},5~{R})-5-(6-azanyl-7,8-dihydropurin-9-yl)-2-[[[[[(2~{R},3~{S},4~{R},5~{R})-5-(2-azanyl-7-methyl-6-oxidanylidene-1,8-dihydropurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]oxy-oxidanyl-phosphoryl]oxy-oxidanyl-phosphoryl]oxymethyl]-4-methoxy-oxolan-3-yl] [(2~{R},3~{S},4~{R},5~{S})-5-[2,4-bis(oxidanylidene)pyrimidin-1-yl]-3,4-bis(oxidanyl)oxolan-2-yl]methyl hydrogen phosphate
C31 H46 N12 O25 P4
POOGENYSODSFCS-SWDLWUBYSA-N
SAH (Subject of Investigation/LOI)
Query on SAH

Download Ideal Coordinates CCD File 
E [auth A]S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
MES
Query on MES

Download Ideal Coordinates CCD File 
C [auth A]2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
H [auth B],
I [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
G [auth B]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
MG (Subject of Investigation/LOI)
Query on MG

Download Ideal Coordinates CCD File 
D [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 184.073α = 90
b = 184.073β = 90
c = 57.128γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other privateUnited States--

Revision History  (Full details and data files)

  • Version 1.0: 2021-05-05
    Type: Initial release
  • Version 1.1: 2021-11-17
    Changes: Database references
  • Version 1.2: 2023-10-18
    Changes: Data collection, Refinement description