Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

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

Macromolecule Content

• Total Structure Weight: 94459.55 
• Atom Count: 6486 
• Residue Count: 858 
• Unique protein chains: 1

1F61

CRYSTAL STRUCTURE OF ISOCITRATE LYASE FROM MYCOBACTERIUM TUBERCULOSIS

• DOI: 10.2210/pdb1F61/pdb

• Classification: LYASE
• Organism(s): Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
• Expression System: Escherichia coli


• Deposited: 2000-06-19 Released: 2000-08-30 
• Deposition Author(s): Sharma, V., Sharma, S., Hoener zu Bentrup, K.H., McKinney, J.D., Russell, D.G., Jacobs Jr., W.R., Sacchettini, J.C., TB Structural Genomics Consortium (TBSGC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.191 
• R-Value Work: 0.165 

Literature

Structure of isocitrate lyase, a persistence factor of Mycobacterium tuberculosis.

Sharma, V., Sharma, S., Hoener zu Bentrup, K., McKinney, J.D., Russell, D.G., Jacobs Jr., W.R., Sacchettini, J.C.

(2000) Nat.Struct.Mol.Biol. 7: 663-668

• PubMed: 10932251 
• DOI: 10.1038/77964
• Primary Citation of Related Structures:  
  1F8M, 1F8I


• PubMed Abstract: 
  

Isocitrate lyase (ICL) plays a pivotal role in the persistence of Mycobacterium tuberculosis in mice by sustaining intracellular infection in inflammatory macrophages. The enzyme allows net carbon gain by diverting acetyl-CoA from beta-oxidation of fatty acids into the glyoxylate shunt pathway. Given its potential as a drug target against persistent infections, we solved its structure without ligand and in complex with two inhibitors. Covalent modification of an active site residue, Cys 191, by the inhibitor 3-bromopyruvate traps the enzyme in a catalytic conformation with the active site completely inaccessible to solvent. The structure of a C191S mutant of the enzyme with the inhibitor 3-nitropropionate provides further insight into the reaction mechanism.

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Organizational Affiliation: 

Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843-2128, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
ISOCITRATE LYASE	A, B	429	Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)	Mutation(s): 0  Gene Names: icl EC: 4.1.3.1
Find proteins for P9WKK7 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Go to UniProtKB:  P9WKK7

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.191 
• R-Value Work: 0.165 
• Space Group: P 6₅ 2 2

Unit Cell:

Length (Å)	Angle (°)
a = 130.245	α = 90.00
b = 130.245	β = 90.00
c = 288.405	γ = 120.00

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-06-19 
• Released Date: 2000-08-30 
• Deposition Author(s): Sharma, V., Sharma, S., Hoener zu Bentrup, K.H., McKinney, J.D., Russell, D.G., Jacobs Jr., W.R., Sacchettini, J.C., TB Structural Genomics Consortium (TBSGC)

Revision History 

• Version 1.0: 2000-08-30
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Derived calculations, Version format compliance