5TTK image
Deposition Date 2016-11-03
Release Date 2017-01-25
Last Version Date 2024-11-20
Entry Detail
PDB ID:
5TTK
Keywords:
OXIDOREDUCTASE
Title:
Crystal Structure of Selenomethionine-incorporated Nicotine Oxidoreductase from Pseudomonas putida
Biological Source:
Source Organism:
Pseudomonas putida (strain S16) (Taxon ID: 1042876)
Host Organism:
Escherichia coli 'BL21-Gold(DE3)pLysS AG'
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.51 Å
R-Value Free:
0.24
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 21 21 21
5TTK validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Amine oxidase
Gene (Uniprot):nicA2
Chain IDs:A, B, C, D
Chain Length:490
Number of Molecules:4
Biological Source:Pseudomonas putida (strain S16)
UniProt ID:F8G0P2 Pfam ID:PF01593
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MSE A MET modified residue
Ligand Molecules
FAD
Primary Citation
Structural Analysis Provides Mechanistic Insight into Nicotine Oxidoreductase from Pseudomonas putida.
Biochemistry 55 6595 6598 (2016)
PMID: 27933790 DOI: 10.1021/acs.biochem.6b00963

Abstact

The first structure of nicotine oxidoreductase (NicA2) was determined by X-ray crystallography. Pseudomonas putida has evolved nicotine-degrading activity to provide a source of carbon and nitrogen. The structure establishes NicA2 as a member of the monoamine oxidase family. Residues 1-50 are disordered and may play a role in localization. The nicotine-binding site proximal to the isoalloxazine ring of flavin shows an unusual composition of the classical aromatic cage (W427 and N462). The active site architecture is consistent with the proposed binding of the deprotonated form of the substrate and the flavin-dependent oxidation of the pyrrolidone C-N bond followed by nonenzymatic hydrolysis.

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Primary Citation of related structures
5TTJ
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