Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D3  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

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

Macromolecule Content

• Total Structure Weight: 51.23 kDa 
• Atom Count: 3639 
• Residue Count: 443 
• Unique protein chains: 1

1B93

METHYLGLYOXAL SYNTHASE FROM ESCHERICHIA COLI

• DOI: 10.2210/pdb1B93/pdb

• Classification: LYASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1999-02-23 Released: 1999-03-16 
• Deposition Author(s): Saadat, D., Harrison, D.H.T.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.202 
• R-Value Work: 0.181 
• R-Value Observed: 0.181 

Literature

The crystal structure of methylglyoxal synthase from Escherichia coli.

Saadat, D., Harrison, D.H.

(1999) Structure 7: 309-317

• PubMed: 10368300 
• DOI: 10.1016/s0969-2126(99)80041-0
• Primary Citation of Related Structures:  
  1B93


• PubMed Abstract: 
  

The reaction mechanism of methylglyoxal synthase (MGS) is believed to be similar to that of triosephosphate isomerase (TIM). Both enzymes utilise dihydroxyacetone phosphate (DHAP) to form an enediol(ate) phosphate intermediate as the first step of their reaction pathways. However, the second catalytic step in the MGS reaction pathway is characterized by the elimination of phosphate and collapse of the enediol(ate) to form methylglyoxal instead of reprotonation to form the isomer glyceraldehyde 3-phosphate.

---

Organizational Affiliation: 

Department of Biochemistry, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (METHYLGLYOXAL SYNTHASE)	A, B, C	152	Escherichia coli	Mutation(s): 0  Gene Names: mgsA EC: 4.2.3.3
Find proteins for P0A731 (Escherichia coli (strain K12)) Explore P0A731  Go to UniProtKB:  P0A731

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	B	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
FMT	A, B, C	FORMIC ACID C H2 O2 BDAGIHXWWSANSR-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.202 
• R-Value Work: 0.181 
• R-Value Observed: 0.181 
• Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 123.34	α = 90
b = 123.34	β = 90
c = 155.98	γ = 120

Software Package:

Software Name	Purpose
XTALVIEW	refinement
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-02-23 
• Released Date: 1999-03-16 
Deposition Author(s): Saadat, D., Harrison, D.H.T.

Revision History 

• Version 1.0: 1999-03-16
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance