2VZ2 image
Deposition Date 2008-07-29
Release Date 2008-12-16
Last Version Date 2024-11-06
Entry Detail
PDB ID:
2VZ2
Keywords:
Title:
Human MAO B in complex with mofegiline
Biological Source:
Source Organism:
HOMO SAPIENS (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.30 Å
R-Value Free:
0.22
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
C 2 2 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:AMINE OXIDASE [FLAVIN-CONTAINING] B
Gene (Uniprot):MAOB
Chain IDs:A, B
Chain Length:520
Number of Molecules:2
Biological Source:HOMO SAPIENS
Primary Citation
Structural and mechanistic studies of mofegiline inhibition of recombinant human monoamine oxidase B.
J. Med. Chem. 51 8019 8026 (2008)
PMID: 19053775 DOI: 10.1021/jm8011867

Abstact

Mechanistic and structural studies have been carried out to investigate the molecular basis for the irreversible inhibition of human MAO-B by mofegiline. Competitive inhibition with substrate shows an apparent K(i) of 28 nM. Irreversible inhibition of MAO-B occurs with a 1:1 molar stoichiometry with no observable catalytic turnover. The absorption spectral properties of mofegiline inhibited MAO-B show features (lambda(max) approximately 450 nm) unlike those of traditional flavin N(5) or C(4a) adducts. Visible and near-UV circular dichroism spectra of the mofegiline-MAO-B adduct shows a negative peak at 340 nm with an intensity similar to that of N(5) flavocyanine adducts. The X-ray crystal structure of the mofegiline-MAO-B adduct shows a covalent bond between the flavin cofactor N(5) with the distal allylamine carbon atom as well as the absence of the fluorine atom. A mechanism to explain these structural and spectral data is proposed.

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