2BK4

Human Monoamine Oxidase B: I199F mutant in complex with rasagiline


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Demonstration of Isoleucine 199 as a Structural Determinant for the Selective Inhibition of Human Monoamine Oxidase B by Specific Reversible Inhibitors

Hubalek, F.Binda, C.Khalil, A.Li, M.Mattevi, A.Castagnoli, N.Edmondson, D.E.

(2005) J.Biol.Chem. 280: 15761

  • DOI: 10.1074/jbc.M500949200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Several reversible inhibitors selective for human monoamine oxidase B (MAO B) that do not inhibit MAO A have been described in the literature. The following compounds: 8-(3-chlorostyryl)caffeine, 1,4-diphenyl-2-butene, and trans,trans-farnesol are sh ...

    Several reversible inhibitors selective for human monoamine oxidase B (MAO B) that do not inhibit MAO A have been described in the literature. The following compounds: 8-(3-chlorostyryl)caffeine, 1,4-diphenyl-2-butene, and trans,trans-farnesol are shown to inhibit competitively human, horse, rat, and mouse MAO B with K(i) values in the low micromolar range but are without effect on either bovine or sheep MAO B or human MAO A. In contrast, the reversible competitive inhibitor isatin binds to all known MAO B and MAO A with similar affinities. Sequence alignments and the crystal structures of human MAO B in complex with 1,4-diphenyl-2-butene or with trans,trans-farnesol provide molecular insights into these specificities. These inhibitors span the substrate and entrance cavities with the side chain of Ile-199 rotated out of its normal conformation suggesting that Ile-199 is gating the substrate cavity. Ile-199 is conserved in all known MAO B sequences except bovine MAO B, which has Phe in this position (the sequence of sheep MAO B is unknown). Phe is conserved in the analogous position in MAO A sequences. The human MAO B I199F mutant protein of MAO B binds to isatin (K(i) = 3 microM) but not to the three inhibitors listed above. The crystal structure of this mutant demonstrates that the side chain of Phe-199 interferes with the binding of those compounds. This suggests that the Ile-199 "gate" is a determinant for the specificity of these MAO B inhibitors and provides a molecular basis for the development of MAO B-specific reversible inhibitors without interference with MAO A function in neurotransmitter metabolism.


    Organizational Affiliation

    Department of Biochemistry, Emory University, Atlanta, Georgia 30322, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AMINE OXIDASE [FLAVIN-CONTAINING] B
A, B
520Homo sapiensMutations: F199I
Gene Names: MAOB
EC: 1.4.3.4
Find proteins for P27338 (Homo sapiens)
Go to Gene View: MAOB
Go to UniProtKB:  P27338
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

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

Download SDF File 
Download CCD File 
A, B
(1R)-N-(prop-2-en-1-yl)-2,3-dihydro-1H-inden-1-amine
RASAGILINE, BOUND FORM
C12 H15 N
RPAZWTZFMPXUKS-GFCCVEGCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.191 
  • Space Group: C 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 132.026α = 90.00
b = 223.524β = 90.00
c = 86.714γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-02-14
    Type: Initial release
  • Version 1.1: 2012-02-29
    Type: Derived calculations, Non-polymer description, Other, Version format compliance