Crystal structure of Mycobacterium tuberculosis ICL2 in complex with acetyl-CoA

Experimental Data Snapshot

  • Resolution: 2.36 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 

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Acetyl-CoA-mediated activation of Mycobacterium tuberculosis isocitrate lyase 2.

Bhusal, R.P.Jiao, W.Kwai, B.X.C.Reynisson, J.Collins, A.J.Sperry, J.Bashiri, G.Leung, I.K.H.

(2019) Nat Commun 10: 4639-4639

  • DOI: https://doi.org/10.1038/s41467-019-12614-7
  • Primary Citation of Related Structures:  
    6EDW, 6EDZ, 6EE1

  • PubMed Abstract: 

    Isocitrate lyase is important for lipid utilisation by Mycobacterium tuberculosis but its ICL2 isoform is poorly understood. Here we report that binding of the lipid metabolites acetyl-CoA or propionyl-CoA to ICL2 induces a striking structural rearrangement, substantially increasing isocitrate lyase and methylisocitrate lyase activities. Thus, ICL2 plays a pivotal role regulating carbon flux between the tricarboxylic acid (TCA) cycle, glyoxylate shunt and methylcitrate cycle at high lipid concentrations, a mechanism essential for bacterial growth and virulence.

  • Organizational Affiliation

    School of Chemical Sciences, The University of Auckland, Private Bag 92019, Victoria Street West, Auckland, 1142, New Zealand.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Isocitrate lyase 2
A, B, C, D
786Mycobacterium tuberculosis CDC1551Mutation(s): 0 
Gene Names: icl2aceA-2MT1966
Find proteins for Q8VJU4 (Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh))
Explore Q8VJU4 
Go to UniProtKB:  Q8VJU4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8VJU4
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.36 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.475α = 90
b = 169.972β = 95.26
c = 106.425γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-08-14
    Type: Initial release
  • Version 1.1: 2019-10-23
    Changes: Data collection, Database references
  • Version 1.2: 2024-03-13
    Changes: Data collection, Database references, Derived calculations