Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

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

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

Biological assembly 2 assigned by authors.

Biological Assembly 3  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

Biological assembly 3 assigned by authors.

Macromolecule Content

• Total Structure Weight: 114.81 kDa 
• Atom Count: 7447 
• Modelled Residue Count: 908 
• Deposited Residue Count: 988 
• Unique protein chains: 1

1SUS

Crystal structure of alfalfa feruoyl coenzyme A 3-O-methyltransferase

• PDB DOI: 10.2210/pdb1SUS/pdb

• Classification: TRANSFERASE
• Organism(s): Medicago sativa
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-03-26 Released: 2005-03-15 
• Deposition Author(s): Ferrer, J.-L., Zubieta, C., Dixon, R.A., Noel, J.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.289 
• R-Value Work: 0.245 

Literature

Crystal Structures of Alfalfa Caffeoyl Coenzyme A 3-O-Methyltransferase

Ferrer, J.-L., Zubieta, C., Dixon, R.A., Noel, J.P.

(2005) Plant Physiol 137: 1009-1017

• PubMed: 15734921 
• DOI: 10.1104/pp.104.048751
• Primary Citation of Related Structures:  
  1SUI, 1SUS


• PubMed Abstract: 
  

Caffeoyl coenzyme A 3-O-methyltransferases (CCoAOMTs) are S-adenosyl-l-methionine-dependent O-methyltransferases (OMTs) involved in lignin biosynthesis. Plant CCoAOMTs belong to a distinct family of OMTs, more closely related to the mammalian catechol OMTs than to other plant OMTs. The crystal structure of alfalfa (Medicago sativa) CCoAOMT in complex with the reaction products S-adenosine-l-homocysteine and feruloyl/sinapoyl CoAs presented here belong to a structurally and mechanistically distinct family of plant small molecule OMTs. These structures provide a new understanding of the substrate preferences and the catalytic mechanism accompanying CCoAOMT-mediated O-methylation of CoA-linked phenylpropanoid substrates.

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Organizational Affiliation: 

Laboratoire de Cristallographie et Cristallogenèse des Protéines, Institut de Biologie Structurale, 38027 Grenoble cedex 1, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Caffeoyl-CoA O-methyltransferase	A, B, C, D	247	Medicago sativa	Mutation(s): 0  Gene Names: CCOMT EC: 2.1.1.104
UniProt
Find proteins for Q40313 (Medicago sativa) Explore Q40313  Go to UniProtKB:  Q40313

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SPF	G [auth A]	SINAPOYL COENZYME A C32 H44 N7 O20 P3 S HJGDVDUGXUSOGA-ADTMLPBESA-N
SAH	F [auth A], I [auth B], K [auth C], M [auth D]	S-ADENOSYL-L-HOMOCYSTEINE C14 H20 N6 O5 S ZJUKTBDSGOFHSH-WFMPWKQPSA-N
CA	E [auth A], H [auth B], J [auth C], L [auth D]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.289 
• R-Value Work: 0.245 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 60.854	α = 90
b = 136.486	β = 90
c = 332.778	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SnB	phasing
MLPHARE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-03-26 
• Released Date: 2005-03-15 
Deposition Author(s): Ferrer, J.-L., Zubieta, C., Dixon, R.A., Noel, J.P.

Revision History  

• Version 1.0: 2005-03-15
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-11
  Changes: Refinement description