ISDA

Deposition Date 2018-08-12

Release Date 2019-08-14

Last Version Date 2025-04-02

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) (Taxon ID: 83331)

Host Organism:

Escherichia coli

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

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Isocitrate lyase 2
Gene (Uniprot):icl2
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

Primary Citation

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.Show

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.

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Protein

Chemical

Disease

Primary Citation of related structures