Structural and mechanistic studies of mofegiline inhibition of recombinant human monoamine oxidase B.
Structural and mechanistic studies of mofegiline inhibition of recombinant human monoamine oxidase B.
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DOI:
10.1021/jm8011867
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发表时间:
2008-12-25
影响因子:
7.3
通讯作者:
Edmondson DE
中科院分区:
文献类型:
--
作者:
Milczek EM;Bonivento D;Binda C;Mattevi A;McDonald IA;Edmondson DE
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 Ki 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 (λmax ≃ 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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影响因子:
2.9
作者:
Benson, TE;Walsh, CT;Massey, V
通讯作者:
Massey, V
影响因子:
7.3
作者:
Hubálek, F;Binda, C;Edmondson, DE
通讯作者:
Edmondson, DE
DOI:
10.1107/s090744499900846x
发表时间:
1999-10-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Leslie, AGW
通讯作者:
Leslie, AGW
影响因子:
2.9
作者:
Li, M;Binda, C;Edmondson, DE
通讯作者:
Edmondson, DE
影响因子:
1.6
作者:
Li, M;Hubálek, F;Edmondson, DE
通讯作者:
Edmondson, DE