4KGD image
Deposition Date 2013-04-29
Release Date 2013-06-12
Last Version Date 2023-09-20
Entry Detail
PDB ID:
4KGD
Keywords:
OXIDOREDUCTASE
Title:
High-resolution crystal structure of pyruvate oxidase from L. plantarum in complex with phosphate
Biological Source:
Source Organism:
Lactobacillus plantarum (Taxon ID: 644042)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.06 Å
R-Value Free:
0.15
R-Value Work:
0.12
R-Value Observed:
0.12
Space Group:
C 2 2 21
4KGD validation report
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Pyruvate oxidase
Chain IDs:A, B
Chain Length:603
Number of Molecules:2
Biological Source:Lactobacillus plantarum
Ligand Molecules
FAD
GOL
K
MG
PO4
TPP
Primary Citation
Observation of a stable carbene at the active site of a thiamin enzyme.
Nat.Chem.Biol. 9 488 490 (2013)
PMID: 23748673 DOI: 10.1038/nchembio.1275

Abstact

Carbenes are highly reactive chemical compounds that are exploited as ligands in organometallic chemistry and are powerful organic catalysts. They were postulated to occur as transient intermediates in enzymes, yet their existence in a biological system could never be demonstrated directly. We present spectroscopic and structural data of a thiamin enzyme in a noncovalent complex with substrate, which implicate accumulation of a stable carbene as a major resonance contributor to deprotonated thiamin.

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Primary Citation of related structures
4FEE