Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 120146.74 
• Atom Count: 8115 
• Residue Count: 1040 
• Unique protein chains: 1

2XFQ

Rasagiline-inhibited human monoamine oxidase B in complex with 2-(2- benzofuranyl)-2-imidazoline

• DOI: 10.2210/pdb2XFQ/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Homo sapiens
• Expression System: Komagataella pastoris


• Deposited: 2010-05-26 Released: 2010-10-06 
• Deposition Author(s): Bonivento, D., Milczek, E.M., McDonald, G.R., Binda, C., Holt, A., Edmondson, D.E., Mattevi, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Work: 0.159 

Literature

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: 36849-36856

• PubMed: 20855894 
• DOI: 10.1074/jbc.M110.169482
• Primary Citation of Related Structures:  
  2XFU, 2XFP, 2XFN, 2XCG, 2XFO
• Also Cited By: 2XFU


• PubMed Abstract: 
  

Crystallographic and biochemical studies have been employed to identify the binding site and mechanism for potentiation of imidazoline binding in human monoamine oxidase B (MAO B). 2-(2-Benzofuranyl)-2-imidazoline (2-BFI) inhibits recombinant human MAO B with a K(i) of 8.3 ± 0.6 μM, whereas tranylcypromine-inhibited MAO B binds 2-BFI with a K(d) of 9 ± 2 nM, representing an increase in binding energy Δ(ΔG) of -3.9 kcal/mol. Crystal structures show the imidazoline ligand bound in a site that is distinct from the substrate-binding cavity. Contributions to account for the increase in binding affinity upon tranylcypromine inhibition include a conformational change in the side chain of Gln(206) and a "closed conformation" of the side chain of Ile(199), forming a hydrophobic "sandwich" with the side chain of Ile(316) on each face of the benzofuran ring of 2-BFI. Data with the I199A mutant of human MAO B and failure to observe a similar binding potentiation with rat MAO B, where Ile(316) is replaced with a Val residue, support an allosteric mechanism where the increased binding affinity of 2-BFI results from a cooperative increase in H-bond strength through formation of a more hydrophobic milieu. These insights should prove valuable in the design of high affinity and specific reversible MAO B inhibitors.

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Organizational Affiliation: 

Department of Genetics and Microbiology, University of Pavia, I-27100 Pavia PV, Italy.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Amine oxidase [flavin-containing] B	A, B	520	Homo sapiens	Mutation(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 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
FAD	A, B	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N
XCG	A, B	2-(2-BENZOFURANYL)-2-IMIDAZOLINE C11 H8 N2 O VBFQIUOSXHUWCT-UHFFFAOYSA-N
RAS	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
C15	A	N-DODECYL-N,N-DIMETHYL-3-AMMONIO-1-PROPANESULFONATE C17 H38 N O3 S IZWSFJTYBVKZNK-UHFFFAOYSA-O

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Work: 0.159 
• Space Group: C 2 2 2

Unit Cell:

Length (Å)	Angle (°)
a = 131.510	α = 90.00
b = 223.380	β = 90.00
c = 86.550	γ = 90.00

Software Package:

Software Name	Purpose
REFMAC	refinement
REFMAC	phasing
SCALA	data scaling
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-05-26 
• Released Date: 2010-10-06 
• Deposition Author(s): Bonivento, D., Milczek, E.M., McDonald, G.R., Binda, C., Holt, A., Edmondson, D.E., Mattevi, A.

Revision History 

• Version 1.0: 2010-10-06
  Type: Initial release
• Version 1.1: 2012-02-29
  Type: Non-polymer description, Version format compliance
• Version 1.2: 2017-12-20
  Type: Database references
• Version 1.3: 2018-05-16
  Type: Data collection
• Version 1.4: 2018-10-17
  Type: Data collection, Database references, Source and taxonomy, Structure summary