共 47 条
Targeting Bcl-2-IP3 receptor interaction to reverse Bcl-2's inhibition of apoptotic calcium signals
被引:211
作者:
Rong, Yi-Ping
[1
,2
]
Aromolaran, Ademuyiwa S.
[4
]
Bultynck, Geert
[5
]
Zhong, Fei
[1
,2
]
Li, Xiang
[3
]
McColl, Karen
[1
,2
]
Matsuyama, Shigemi
[1
,2
]
Herlitze, Stephan
[3
]
Roderick, H. Llewelyn
[6
,7
]
Bootman, Martin D.
[6
]
Mignery, Gregory A.
[4
]
Parys, Jan B.
[5
]
De Smedt, Humbert
[5
]
Distelhorst, Clark W.
[1
,2
]
机构:
[1] Case Western Reserve Univ, Dept Med, Cleveland, OH 44106 USA
[2] Case Western Reserve Univ, Dept Pharmacol, Cleveland, OH 44106 USA
[3] Case Western Reserve Univ, Dept Neurosci, Cleveland, OH 44106 USA
[4] Loyola Univ, Stritch Sch Med, Dept Physiol, Maywood, IL 60153 USA
[5] Katholieke Univ Leuven, Div Physiol, Mol Signalling Lab, B-3000 Louvain, Belgium
[6] Babraham Inst, Lab Mol & Cellular Signaling, Cambridge CB2 4AT, England
[7] Univ Cambridge, Dept Pharmacol, Cambridge CB2 1PD, England
基金:
英国生物技术与生命科学研究理事会;
关键词:
D O I:
10.1016/j.molcel.2008.06.014
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
The antiapoptotic protein Bcl-2 inhibits Ca2+ release from the endoplasmic reticulum (ER). One proposed mechanism involves an interaction of Bcl-2 with the inositol 1,4,5-trisphosphate receptor (IP3R) Ca2+ channel localized with Bcl-2 on the ER. Here we document Bcl-2-IP3R interaction within cells by FRET and identify a Bcl-2 interacting region in the regulatory and coupling domain of the IP3R. A peptide based on this IP3R sequence displaced Bcl-2 from the IP3R and reversed Bcl-2-mediated inhibition of IP3R channel activity in vitro, IP3-induced ER Ca2+ release in permeabilized cells, and cell-permeable IP3 ester-induced Ca2+ elevation in intact cells. This peptide also reversed Bcl-2's inhibition of T cell receptor-induced Ca2+ elevation and apoptosis. Thus, the interaction of Bcl-2 with IP3Rs contributes to the regulation of proapoptotic Ca2+ signals by Bcl-2, suggesting the Bcl-2-IP3R interaction as a potential therapeutic target in diseases associated with Bcl-2's inhibition of cell death.
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页码:255 / 265
页数:11
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