2WGE

Crystal structure of KasA of Mycobacterium tuberculosis with bound TLM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal Structures of Mycobacterium Tuberculosis Kasa Show Mode of Action within Cell Wall Biosynthesis and its Inhibition by Thiolactomycin

Luckner, S.R.Machutta, C.A.Tonge, P.J.Kisker, C.

(2009) Structure 17: 1004

  • DOI: 10.1016/j.str.2009.04.012
  • Primary Citation of Related Structures:  
    2WGD, 2WGE, 2WGF, 2WGG

  • PubMed Abstract: 
  • Mycobacteria have a unique cell wall consisting of mycolic acids, very-long-chain lipids that provide protection and allow the bacteria to persist within human macrophages. Inhibition of cell wall biosynthesis is fatal for the organism and a starting ...

    Mycobacteria have a unique cell wall consisting of mycolic acids, very-long-chain lipids that provide protection and allow the bacteria to persist within human macrophages. Inhibition of cell wall biosynthesis is fatal for the organism and a starting point for the discovery and development of novel antibiotics. We determined the crystal structures of KasA, a key enzyme involved in the biosynthesis of long-chain fatty acids, in its apo-form and bound to the natural product inhibitor thiolactomycin. Detailed insights into the interaction of the inhibitor with KasA and the identification of a polyethylene glycol molecule that mimics a fatty acid substrate of approximately 40 carbon atoms length, represent the first atomic view of a mycobacterial enzyme involved in the synthesis of long-chain fatty acids and provide a robust platform for the development of novel thiolactomycin analogs with high affinity for KasA.


    Organizational Affiliation

    Rudolf Virchow Center for Experimental Biomedicine, Institute for Structural Biology, University of Würzburg, Würzburg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
3-OXOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE 1A416Mycobacterium tuberculosisMutation(s): 0 
EC: 2.3.1.41
Find proteins for P9WQD9 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WQD9 
Go to UniProtKB:  P9WQD9
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TLM
Query on TLM

Download CCD File 
A
THIOLACTOMYCIN
C11 H14 O2 S
SYQNUQSGEWNWKV-XUIVZRPNSA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
IPA
Query on IPA

Download CCD File 
A
ISOPROPYL ALCOHOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
TLMKd:  226000   nM  BindingDB
TLMKi:  175400   nM  BindingDB
TLMKi:  1900   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.542α = 90
b = 77.542β = 90
c = 148.458γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-21
    Type: Initial release
  • Version 1.1: 2012-04-11
    Changes: Database references, Derived calculations, Non-polymer description, Other, Version format compliance