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


Ligand Structure Quality Assessment 


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
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acetolactate synthase
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H
571Bacillus subtilis PY79Mutation(s): 0 
Gene Names: U712_18080
EC: 4.1.3.18
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
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  • 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],
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],
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],
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

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Ligand Structure Quality Assessment 


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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