Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 21.53 kDa 
• Atom Count: 1341 
• Residue Count: 151 
• Unique protein chains: 1

1R67

Y104A MUTANT OF E.COLI IPP ISOMERASE

• DOI: 10.2210/pdb1R67/pdb

• Classification: ISOMERASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2003-10-15 Released: 2003-10-21 
• Deposition Author(s): Wouters, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.77 Å
• R-Value Free: 0.272 
• R-Value Work: 0.190 
• R-Value Observed: 0.197 

Literature

Structural role for Tyr-104 in Escherichia coli isopentenyl-diphosphate isomerase: site-directed mutagenesis, enzymology, and protein crystallography.

de Ruyck, J., Durisotti, V., Oudjama, Y., Wouters, J.

(2006) J Biol Chem 281: 17864-17869

• PubMed: 16617181 
• DOI: 10.1074/jbc.M601851200
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Isopentenyl-diphosphate (IPP):dimethylallyl diphosphate isomerase is a key enzyme in the biosynthesis of isoprenoids. The mechanism of the isomerization reaction involves protonation of the unactivated carbon-carbon double bond in the substrate, but identity of the acidic moiety providing the proton is still not clear. Multiple sequence alignments and geometrical features observed in crystal structures of complexes with IPP isomerase suggest that Tyr-104 could play an important role during catalysis. A series of mutants was constructed by directed mutagenesis and characterized by enzymology. Crystallographic and thermal denaturation data for Y104A and Y104F mutants were obtained. Those data demonstrate the importance of residue Tyr-104 for proper folding of Escherichia coli type I IPP isomerase.

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Organizational Affiliation: 

Laboratoire de Chimie Biologique Structurale, University of Namur, 61 Rue de Bruxelles, 5000 Namur, Belgium. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Isopentenyl-diphosphate delta-isomerase	A	190	Escherichia coli	Mutation(s): 1  Gene Names: IDI OR B2889 EC: 5.3.3.2
Find proteins for Q46822 (Escherichia coli (strain K12)) Explore Q46822  Go to UniProtKB:  Q46822

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MG	A	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.77 Å
• R-Value Free: 0.272 
• R-Value Work: 0.190 
• R-Value Observed: 0.197 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.648	α = 90
b = 71.648	β = 90
c = 61.327	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SHELX	model building
SHELXL-97	refinement
SHELX	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-10-15 
• Released Date: 2003-10-21 
Deposition Author(s): Wouters, J.

Revision History 

• Version 1.0: 2003-10-21
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance