4RJJ

Acetolactate synthase from Bacillus subtilis bound to ThDP - crystal form II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.34 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Detailed Structure-Function Correlations of Bacillus subtilis Acetolactate Synthase.

Sommer, B.von Moeller, H.Haack, M.Qoura, F.Langner, C.Bourenkov, G.Garbe, D.Loll, B.Bruck, T.

(2015) Chembiochem 16: 110-118

  • DOI: 10.1002/cbic.201402541
  • Primary Citation of Related Structures:  
    4RJI, 4RJJ, 4RJK

  • PubMed Abstract: 
  • Isobutanol is deemed to be a next-generation biofuel and a renewable platform chemical.1 Non-natural biosynthetic pathways for isobutanol production have been implemented in cell-based and in vitro systems with Bacillus subtilis acetolactate synthase (AlsS) as key biocatalyst ...

    Isobutanol is deemed to be a next-generation biofuel and a renewable platform chemical.1 Non-natural biosynthetic pathways for isobutanol production have been implemented in cell-based and in vitro systems with Bacillus subtilis acetolactate synthase (AlsS) as key biocatalyst.2-6 AlsS catalyzes the condensation of two pyruvate molecules to acetolactate with thiamine diphosphate and Mg(2+) as cofactors. AlsS also catalyzes the conversion of 2-ketoisovalerate into isobutyraldehyde, the immediate precursor of isobutanol. Our phylogenetic analysis suggests that the ALS enzyme family forms a distinct subgroup of ThDP-dependent enzymes. To unravel catalytically relevant structure-function relationships, we solved the AlsS crystal structure at 2.3 Å in the presence of ThDP, Mg(2+) and in a transition state with a 2-lactyl moiety bound to ThDP. We supplemented our structural data by point mutations in the active site to identify catalytically important residues.


    Organizational Affiliation

    Fachgebiet Industrielle Biokatalyse, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching (Germany).



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acetolactate synthaseA, B, C, D, E, F, G, H571Bacillus subtilis PY79Mutation(s): 0 
Gene Names: U712_18080
EC: 4.1.3.18
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TPP
Query on TPP

Download Ideal Coordinates CCD File 
AA [auth D], AB [auth H], I [auth A], IA [auth E], O [auth B], PA [auth F], U [auth C], UA [auth G]THIAMINE DIPHOSPHATE
C12 H19 N4 O7 P2 S
AYEKOFBPNLCAJY-UHFFFAOYSA-O
 Ligand Interaction
PG4
Query on PG4

Download Ideal Coordinates CCD File 
CA [auth D] , CB [auth H] , DA [auth D] , DB [auth H] , EA [auth D] , EB [auth H] , FA [auth D] , GA [auth D] , 
CA [auth D],  CB [auth H],  DA [auth D],  DB [auth H],  EA [auth D],  EB [auth H],  FA [auth D],  GA [auth D],  K [auth A],  KA [auth E],  L [auth A],  LA [auth E],  M [auth A],  MA [auth E],  N [auth A],  NA [auth E],  OA [auth E],  Q [auth B],  R [auth B],  RA [auth F],  S [auth B],  SA [auth F],  T [auth B],  TA [auth F],  W [auth C],  WA [auth G],  X [auth C],  XA [auth G],  Y [auth C],  YA [auth G],  Z [auth C],  ZA [auth G]
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
HA [auth D]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
BA [auth D], BB [auth H], J [auth A], JA [auth E], P [auth B], QA [auth F], V [auth C], VA [auth G]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.34 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 
  • Space Group: P 21 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.671α = 90
b = 170.003β = 90
c = 339.812γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-22
    Type: Initial release
  • Version 1.1: 2014-11-26
    Changes: Database references
  • Version 1.2: 2015-01-07
    Changes: Database references