5YN6

Crystal structure of MERS-CoV nsp10/nsp16 complex bound to SAM

• PDB DOI: https://doi.org/10.2210/pdb5YN6/pdb

• Classification: TRANSFERASE
• Organism(s): Human betacoronavirus 2c EMC/2012
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2017-10-24 Released: 2018-12-05 
• Deposition Author(s): Wei, S.M., Yang, L., Ke, Z.H., Guo, D.Y., Fan, C.P.
• Funding Organization(s): NSFC

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.227 
• R-Value Work: 0.195 
• R-Value Observed: 0.196 

Starting Model: experimental

Literature

Structural insights into the molecular mechanism of MERS Coronavirus RNA ribose 2'-O-methylation by nsp16/nsp10 protein complex

Wei, S.M., Yang, L., Ke, Z.H., Liu, Q.Y., Che, Y., Yang, Z.Z., Guo, D.Y., Fan, C.P.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 49.17 kDa 
• Atom Count: 3,194 
• Modelled Residue Count: 403 
• Deposited Residue Count: 443 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
nsp16 protein	A	303	Human betacoronavirus 2c EMC/2012	Mutation(s): 0  Gene Names: orf1ab
UniProt
Find proteins for K0BWD0 (Human betacoronavirus 2c EMC/2012) Explore K0BWD0  Go to UniProtKB:  K0BWD0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
nsp10 protein	B	140	Human betacoronavirus 2c EMC/2012	Mutation(s): 0  Gene Names: orf1ab
UniProt
Find proteins for K4LC41 (Human betacoronavirus 2c EMC/2012) Explore K4LC41  Go to UniProtKB:  K4LC41

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SAM	C [auth A]	S-ADENOSYLMETHIONINE C15 H22 N6 O5 S MEFKEPWMEQBLKI-FCKMPRQPSA-N
ZN	D [auth B], E [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.227 
• R-Value Work: 0.195 
• R-Value Observed: 0.196 
• Space Group: P 2₁ 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 66.962	α = 90
b = 70.171	β = 90
c = 119.804	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2018-12-05 
Deposition Author(s): Wei, S.M., Yang, L., Ke, Z.H., Guo, D.Y., Fan, C.P.

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Funding Organization	Location	Grant Number
NSFC	China	3157062

Revision History  

• Version 1.0: 2018-12-05
  Type: Initial release
  
• Version 1.1: 2023-11-22
  Changes: Data collection, Database references, Refinement description