6I6M

Papaver somniferum O-methyltransferase 1

• PDB DOI: https://doi.org/10.2210/pdb6I6M/pdb

• Classification: TRANSFERASE
• Organism(s): Papaver somniferum
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2018-11-15 Released: 2019-03-27 
• Deposition Author(s): Cabry, M.P., Offen, W.A., Winzer, T., Li, Y., Graham, I.A., Davies, G.J., Saleh, P.
• Funding Organization(s): Biotechnology and Biological Sciences Research Council

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.20 Å
• R-Value Free: 0.130 
• R-Value Work: 0.117 
• R-Value Observed: 0.117 

Starting Model: experimental

Literature

Structure of Papaver somniferum O-Methyltransferase 1 Reveals Initiation of Noscapine Biosynthesis with Implications for Plant Natural Product Methylation

Cabry, M.P., Offen, W.A., Winzer, T.H., Li, Y., Graham, I.A., Davies, G.J., Saleh, P.

(2019) ACS Catal 

• DOI: https://doi.org/10.1021/acscatal.9b01038

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: light scattering

Macromolecule Content

• Total Structure Weight: 86.88 kDa 
• Atom Count: 6,734 
• Modelled Residue Count: 700 
• Deposited Residue Count: 786 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
O-methyltransferase 1	A, B	393	Papaver somniferum	Mutation(s): 3  Gene Names: MT1 EC: 2.1.1.89 (UniProt), 2.1.1.117 (UniProt), 2.1.1 (UniProt)
UniProt
Find proteins for I3V6A7 (Papaver somniferum) Explore I3V6A7  Go to UniProtKB:  I3V6A7

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SAH	D [auth A], F [auth B]	S-ADENOSYL-L-HOMOCYSTEINE C14 H20 N6 O5 S ZJUKTBDSGOFHSH-WFMPWKQPSA-N
SLX	C [auth A], E [auth B]	(13aS)-3,10-dimethoxy-5,8,13,13a-tetrahydro-6H-isoquino[3,2-a]isoquinoline-2,9-diol C19 H21 N O4 KNWVMRVOBAFFMH-HNNXBMFYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.20 Å
• R-Value Free: 0.130 
• R-Value Work: 0.117 
• R-Value Observed: 0.117 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 68.868	α = 90
b = 76.617	β = 101.55
c = 77.158	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
xia2	data reduction
Aimless	data scaling
MOLREP	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2019-03-27 
Deposition Author(s): Cabry, M.P., Offen, W.A., Winzer, T., Li, Y., Graham, I.A., Davies, G.J., Saleh, P.

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Funding Organization	Location	Grant Number
Biotechnology and Biological Sciences Research Council	United Kingdom	BB/M011151/1

Revision History  

• Version 1.0: 2019-03-27
  Type: Initial release
  
• Version 1.1: 2019-04-10
  Changes: Data collection, Database references
• Version 1.2: 2024-01-24
  Changes: Data collection, Database references, Refinement description