X-ray Crystal structure of a methylmalonate semialdehyde dehydrogenase from Pseudomonas sp. AAC

Experimental Data Snapshot

  • Resolution: 2.95 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Structural Analysis Provides Mechanistic Insight into Nicotine Oxidoreductase from Pseudomonas putida.

Tararina, M.A.Janda, K.D.Allen, K.N.

(2016) Biochemistry 55: 6595-6598

  • DOI: https://doi.org/10.1021/acs.biochem.6b00963
  • Primary Citation of Related Structures:  
    5TJR, 5TTJ, 5TTK

  • PubMed Abstract: 

    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.

  • Organizational Affiliation

    Program in Biomolecular Pharmacology, Boston University School of Medicine , 72 East Concord Street, Boston, Massachusetts 02118, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Methylmalonate-semialdehyde dehydrogenase
A, B, C, D, E
A, B, C, D, E, F
531Pseudomonas sp. AACMutation(s): 0 
Gene Names: FG99_15390
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.95 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.891α = 90
b = 156.631β = 90
c = 192.246γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-01-11
    Type: Initial release
  • Version 1.1: 2018-04-18
    Changes: Data collection, Database references
  • Version 1.2: 2023-10-04
    Changes: Data collection, Database references, Refinement description