2AG0: Crystal Structure Of Benzaldehyde Lyase (bal)- Native

Pseudomonas fluorescens is able to grow on R-benzoin as the sole carbon and energy source because it harbours the enzyme benzaldehyde lyase that cleaves the acyloin linkage using thiamine diphosphate (ThDP) as a cofactor. In the reverse reaction, this lyase catalyses the carboligation of two aldehydes with high substrate and stereospecificity. The enzyme structure was determined by X-ray diffraction at 2.6 A resolution. A structure-based comparison with other proteins showed that benzaldehyde lyase belongs to a group of closely related ThDP-dependent enzymes. The ThDP cofactors of these enzymes are fixed at their two ends in separate domains, suspending a comparatively mobile thiazolium ring between them. While the residues binding the two ends of ThDP are well conserved, the lining of the active centre pocket around the thiazolium moiety varies greatly within the group. Accounting for the known reaction chemistry, the natural substrate R-benzoin was modelled unambiguously into the active centre of the reported benzaldehyde lyase. Due to its substrate spectrum and stereospecificity, the enzyme extends the synthetic potential for carboligations appreciably.
PDB ID: 2AG0Download
MMDB ID: 37051
PDB Deposition Date: 2005/7/26
Updated in MMDB: 2017/11
Experimental Method:
x-ray diffraction
Resolution: 2.58  Å
Source Organism:
Similar Structures:
Biological Unit for 2AG0: tetrameric; determined by author and by software (PISA)
Molecular Components in 2AG0
Label Count Molecule
Proteins (4 molecules)
Benzaldehyde Lyase
Molecule annotation
Chemicals (8 molecules)
* Click molecule labels to explore molecular sequence information.

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