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.
复制标题

DOI:
10.1021/jm8011867
复制
发表时间:
2008-12-25
影响因子:
7.3
通讯作者:
Edmondson DE
Edmondson DE
中科院分区:
医学1区
文献类型:
--
作者:
Milczek EM;Bonivento D;Binda C;Mattevi A;McDonald IA;Edmondson DE

文献摘要

参考文献

被引文献

相似文献

对莫非吉林不可逆抑制人MAO-B的分子基础进行了机制和结构研究。与底物竞争抑制的表观Ki为28 nM。MAO-B的不可逆抑制发生在1:1的摩尔化学计量中,没有可观察到的催化周转。莫非吉兰抑制MAO-B的吸收光谱性质与传统黄素N(5)或C(4a)加合物不同,表现出λmax≃450 nm的特征。莫非吉林- mao - b加合物的可见光和近紫外圆二色性光谱在340 nm处出现一个负峰,强度与N(5)黄花青素加合物相似。莫非吉林- mao - b加合物的x射线晶体结构显示黄素辅因子N(5)与远端烯丙胺碳原子之间存在共价键,且氟原子缺失。提出了一种解释这些结构和光谱数据的机制。
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.
DOI: 10.1021/bi962220o
发表时间: 1997-01-28
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Benson, TE;Walsh, CT;Massey, V
通讯作者: Massey, V
DOI: 10.1021/jm0310885
发表时间: 2004-03-25
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
DOI: 10.1021/bi051847g
发表时间: 2006-04-18
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Li, M;Binda, C;Edmondson, DE
通讯作者: Edmondson, DE
DOI: 10.1006/prep.2001.1546
发表时间: 2002-02-01
影响因子: 1.6
作者:
Li, M;Hubálek, F;Edmondson, DE
通讯作者: Edmondson, DE