6AW8

2.25A resolution domain swapped dimer structure of SAH bound catechol O-methyltransferase (COMT) from Nannospalax galili

• PDB DOI: https://doi.org/10.2210/pdb6AW8/pdb

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


• Deposited: 2017-09-05 Released: 2018-09-12 
• Deposition Author(s): Lovell, S., Mehzabeen, N., Battaile, K.P., Deng, Y., Hanzlik, R.P., Shams, I., Moskovitz, J.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.210 
• R-Value Work: 0.183 
• R-Value Observed: 0.185 

Literature

Crystal structure of the catechol-o-methyl transferase (COMT) enzyme of the subterranean mole rat (Spalax) and the effect of L136M substitution

Deng, Y., Lovell, S., Mehzabeen, N., Battaile, K.P., Hanzlik, R.P., Shams, I., Moskovitz, J.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 78.43 kDa 
• Atom Count: 5,187 
• Modelled Residue Count: 637 
• Deposited Residue Count: 684 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Catechol O-methyltransferase	A, B, C	228	Nannospalax galili	Mutation(s): 0
UniProt
Find proteins for A0A452CSQ0 (Nannospalax galili) Explore A0A452CSQ0  Go to UniProtKB:  A0A452CSQ0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SAH	E [auth A], G [auth B], I [auth C]	S-ADENOSYL-L-HOMOCYSTEINE C14 H20 N6 O5 S ZJUKTBDSGOFHSH-WFMPWKQPSA-N
CA	D [auth A], F [auth B], H [auth C]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.210 
• R-Value Work: 0.183 
• R-Value Observed: 0.185 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 93.643	α = 90
b = 97.531	β = 90
c = 104.909	γ = 90

Software Package:

Software Name	Purpose
Aimless	data scaling
PHASER	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction
XDS	data processing
XDS	data reduction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2018-09-12 
Deposition Author(s): Lovell, S., Mehzabeen, N., Battaile, K.P., Deng, Y., Hanzlik, R.P., Shams, I., Moskovitz, J.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	P30 GM110761

Revision History  

• Version 1.0: 2018-09-12
  Type: Initial release
  
• Version 1.1: 2019-02-20
  Changes: Author supporting evidence, Data collection
• Version 1.2: 2020-01-01
  Changes: Author supporting evidence
• Version 1.3: 2023-10-04
  Changes: Data collection, Database references, Derived calculations, Refinement description