6EDW image
Entry Detail
PDB ID:
6EDW
Keywords:
LYASE
Title:
Crystal structure of Mycobacterium tuberculosis ICL2 in the apo form
Biological Source:
Source Organism:
Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2018-08-12
Release Date:
2019-08-14
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.80 Å
R-Value Free:
0.20
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 1 21 1
6EDW validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Isocitrate lyase 2
Chain IDs:A, B, C, D
Chain Length:786
Number of Molecules:4
Biological Source:Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)
UniProt ID:Q8VJU4 Pfam ID:PF00463
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
CSX A CYS modified residue
Ligand Molecules
GOL
MG
Primary Citation
Acetyl-CoA-mediated activation of Mycobacterium tuberculosis isocitrate lyase 2.
Nat Commun 10 4639 4639 (2019)
PMID: 31604954 DOI: 10.1038/s41467-019-12614-7

Abstact

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.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
6EDZ
6EE1