4GDP

Yeast polyamine oxidase FMS1, N195A mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9998 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mechanistic and Structural Analyses of the Roles of Active Site Residues in Yeast Polyamine Oxidase Fms1: Characterization of the N195A and D94N Enzymes.

Adachi, M.S.Taylor, A.B.Hart, P.J.Fitzpatrick, P.F.

(2012) Biochemistry 51: 8690-8697

  • DOI: 10.1021/bi3011434

  • PubMed Abstract: 
  • Flavoprotein Fms1 from Saccharomyces cerevisiae catalyzes the oxidation of spermine in the biosynthetic pathway for pantothenic acid. The same reaction is catalyzed by the mammalian polyamine and spermine oxidases. The active site of Fms1 contains th ...

    Flavoprotein Fms1 from Saccharomyces cerevisiae catalyzes the oxidation of spermine in the biosynthetic pathway for pantothenic acid. The same reaction is catalyzed by the mammalian polyamine and spermine oxidases. The active site of Fms1 contains three amino acid residues positioned to interact with the polyamine substrate, His67, Asn195, and Asp94. These three residues form a hydrogen-bonding triad with Asn195 being the central residue. Previous studies of the effects of mutating His67 are consistent with that residue being important both for interacting with the substrate and for maintaining the hydrogen bonds in the triad [Adachi, M. S., Taylor, A. B., Hart, P. J., and Fitzpatrick, P. F. (2012) Biochemistry 51, 4888-4897]. The N195A and D94N enzymes have now been characterized to evaluate their roles in catalysis. Both mutations primarily affect the reductive half-reaction. With N(1)-acetylspermine as the substrate, the rate constant for flavin reduction decreases ~450-fold for both mutations; the effects with spermine as the substrate are smaller, 20-40-fold. The k(cat)/K(amine)- and k(cat)-pH profiles with N(1)-acetylspermine are only slightly changed from the profiles for the wild-type enzyme, consistent with the pK(a) values arising from the amine substrate or product and not from active site residues. The structure of the N195A enzyme was determined at a resolution of 2.0 Å. The structure shows a molecule of tetraethylene glycol in the active site and establishes that the mutation has no effect on the protein structure. Overall, the results are consistent with the role of Asn195 and Asp94 being to properly position the polyamine substrate for oxidation.


    Organizational Affiliation

    Department of Biochemistry, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Polyamine oxidase FMS1
A, B, C, D
516Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 1 
Gene Names: FMS1
EC: 1.5.3.17
Find proteins for P50264 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P50264
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download SDF File 
Download CCD File 
A, B, C, D
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
PG4
Query on PG4

Download SDF File 
Download CCD File 
A, B, C, D
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9998 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.203 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 78.851α = 78.07
b = 81.885β = 79.51
c = 104.791γ = 78.92
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2013-01-30
    Type: Database references