共 31 条
The initial substrate-binding site of γ-secretase is located on presenilin near the active site
被引:173
作者:

Kornilova, AY
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机构: Brigham & Womens Hosp, Ctr Neurol Dis, Boston, MA 02115 USA

Bihel, F
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h-index: 0
机构: Brigham & Womens Hosp, Ctr Neurol Dis, Boston, MA 02115 USA

Das, C
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h-index: 0
机构: Brigham & Womens Hosp, Ctr Neurol Dis, Boston, MA 02115 USA

Wolfe, MS
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h-index: 0
机构: Brigham & Womens Hosp, Ctr Neurol Dis, Boston, MA 02115 USA
机构:
[1] Brigham & Womens Hosp, Ctr Neurol Dis, Boston, MA 02115 USA
[2] Harvard Univ, Sch Med, Boston, MA 02115 USA
来源:
关键词:
affinity labeling;
mechanism;
membrane protein;
protease;
D O I:
10.1073/pnas.0407640102
中图分类号:
O [数理科学和化学];
P [天文学、地球科学];
Q [生物科学];
N [自然科学总论];
学科分类号:
07 ;
0710 ;
09 ;
摘要:
gamma-Secretase is a structurally enigmatic multiprotein complex that catalyzes intramembrane proteolysis of a variety of substrates, including the amyloid beta-protein precursor of Alzheimer's disease and the Notch receptor essential to cell differentiation. The active site of this transmembrane aspartyl protease apparently lies at the interface between two subunits of presenilin-1 (PS1); however, evidence suggests the existence of an initial substrate-binding site that is distinct from the active site. Here, we report that photoaffinity probes based on potent helical peptide inhibitors and designed to mimic the amyloid beta-protein precursor substrate bind specifically to the PS subunit interface, at a site close to the active site. The location of the helical peptide-binding site suggests that substrate passes between the two PS1 subunits to access the active site. An aggressive Alzheimer-causing mutation in PS1 strongly reduced photolabeling by a transition-state analogue but not by helical peptides, providing biochemical evidence that the pathological effect of this PS mutation is due to alteration of the active-site topography.
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页码:3230 / 3235
页数:6
相关论文
共 31 条
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机构: Exelixis Inc, San Francisco, CA 94083 USA

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机构: Exelixis Inc, San Francisco, CA 94083 USA

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机构: Exelixis Inc, San Francisco, CA 94083 USA

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机构: Exelixis Inc, San Francisco, CA 94083 USA

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机构: Exelixis Inc, San Francisco, CA 94083 USA

Ellis, MC
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机构: Exelixis Inc, San Francisco, CA 94083 USA

Parks, AL
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h-index: 0
机构: Exelixis Inc, San Francisco, CA 94083 USA

Xu, W
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机构: Exelixis Inc, San Francisco, CA 94083 USA

Li, JH
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机构: Exelixis Inc, San Francisco, CA 94083 USA

Gurney, M
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机构: Exelixis Inc, San Francisco, CA 94083 USA

Myers, RL
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机构: Exelixis Inc, San Francisco, CA 94083 USA

Himes, CS
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机构: Exelixis Inc, San Francisco, CA 94083 USA

Hiebsch, R
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机构: Exelixis Inc, San Francisco, CA 94083 USA

Ruble, C
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机构: Exelixis Inc, San Francisco, CA 94083 USA

Nye, JS
论文数: 0 引用数: 0
h-index: 0
机构: Exelixis Inc, San Francisco, CA 94083 USA

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机构:
Exelixis Inc, San Francisco, CA 94083 USA Exelixis Inc, San Francisco, CA 94083 USA