2XFU

human monoamine oxidase B with tranylcypromine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Insights Into the Mode of Inhibition of Human Mitochondrial Monoamine Oxidase B from High- Resolution Crystal Structures.

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

(2003) Proc.Natl.Acad.Sci.USA 100: 9750

  • DOI: 10.1073/pnas.1633804100
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Monoamine oxidase B (MAO-B) is an outer mitochondrial membrane-bound enzyme that catalyzes the oxidative deamination of arylalkylamine neurotransmitters and has been a target for a number of clinically used drug inhibitors. The 1.7-A structure of the ...

    Monoamine oxidase B (MAO-B) is an outer mitochondrial membrane-bound enzyme that catalyzes the oxidative deamination of arylalkylamine neurotransmitters and has been a target for a number of clinically used drug inhibitors. The 1.7-A structure of the reversible isatin-MAO-B complex has been determined; it forms a basis for the interpretation of the enzyme's structure when bound to either reversible or irreversible inhibitors. 1,4-Diphenyl-2-butene is found to be a reversible MAO-B inhibitor, which occupies both the entrance and substrate cavity space in the enzyme. Comparison of these two structures identifies Ile-199 as a "gate" between the two cavities. Rotation of the side chain allows for either separation or fusion of the two cavities. Inhibition of the enzyme with N-(2-aminoethyl)-p-chlorobenzamide results in the formation of a covalent N(5) flavin adduct with the phenyl ring of the inhibitor occupying a position in the catalytic site overlapping that of isatin. Inhibition of MAO-B with the clinically used trans-2-phenylcyclopropylamine results in the formation of a covalent C(4a) flavin adduct with an opened cyclopropyl ring and the phenyl ring in a parallel orientation to the flavin. The peptide bond between the flavin-substituted Cys-397 and Tyr-398 is in a cis conformation, which allows the proper orientation of the phenolic ring of Tyr-398 in the active site. The flavin ring exists in a twisted nonplanar conformation, which is observed in the oxidized form as well as in both the N(5) and the C(4a) adducts. An immobile water molecule is H-bonded to Lys-296 and to the N(5) of the flavin as observed in other flavin-dependent amine oxidases. The active site cavities are highly apolar; however, hydrophilic areas exist near the flavin and direct the amine moiety of the substrate for binding and catalysis. Small conformational changes are observed on comparison of the different inhibitor-enzyme complexes. Future MAO-B drug design will need to consider "induced fit" contributions as an element in ligand-enzyme interactions.


    Related Citations: 
    • Potentiation of Ligand Binding Through Cooperative Effects in Monoamine Oxidase B.
      Bonivento, D.,Milczek, E.M.,Mcdonald, G.R.,Binda, C.,Holt, A.,Edmondson, D.E.,Mattevi, A.
      (2010) J.Biol.Chem. 285: 36849


    Organizational Affiliation

    Department of Genetics and Microbiology, University of Pavia, Via Abbiategrasso, 27100 Pavia, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AMINE OXIDASE [FLAVIN-CONTAINING] B
A, B
519Homo sapiensMutation(s): 0 
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
3PL
Query on 3PL

Download SDF File 
Download CCD File 
A, B
3-PHENYLPROPANAL
C9 H10 O
YGCZTXZTJXYWCO-UHFFFAOYSA-N
 Ligand Interaction
FA8
Query on FA8

Download SDF File 
Download CCD File 
A, B
[[(2R,3S,4S)-5-[(4AS)-7,8-DIMETHYL-2,4-DIOXO-4A,5-DIHYDROBENZO[G]PTERIDIN-10-YL]-2,3,4-TRIHYDROXY-PENTOXY]-HYDROXY-PHOSPHORYL] [(2R,3S,4R,5R)-5-(6-AMINOPURIN-9-YL)-3,4-DIHYDROXY-OXOLAN-2-YL]METHYL HYDROGEN PHOSPHATE
C27 H35 N9 O15 P2
SDBHOOIZTSVSKT-LDVRFEIFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.188 
  • Space Group: C 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 130.609α = 90.00
b = 222.551β = 90.00
c = 86.201γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
AMoREphasing
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-06-09
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance