Structural transition in Bcl-xL and its potential association with mitochondrial calcium ion transport.
Structural transition in Bcl-xL and its potential association with mitochondrial calcium ion transport.
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DOI:
10.1038/srep10609
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发表时间:
2015-05-29
影响因子:
4.6
通讯作者:
Yoon HS
中科院分区:
文献类型:
--
作者:
Rajan S;Choi M;Nguyen QT;Ye H;Liu W;Toh HT;Kang C;Kamariah N;Li C;Huang H;White C;Baek K;Grüber G;Yoon HS
Bcl-2 family proteins are key regulators for cellular homeostasis in response to apoptotic stimuli. Bcl-xL, an antiapoptotic Bcl-2 family member, undergoes conformational transitions, which leads to two conformational states: the cytoplasmic and membrane-bound. Here we present the crystal and small-angle X-ray scattering (SAXS) structures of Bcl-xL treated with the mild detergent n-Octyl β-D-Maltoside (OM). The detergent-treated Bcl-xL forms a dimer through three-dimensional domain swapping (3DDS) by swapping helices α6-α8 between two monomers. Unlike Bax, a proapoptotic member of the Bcl-2 family, Bcl-xL is not converted to 3DDS homodimer upon binding BH3 peptides and ABT-737, a BH3 mimetic drug. We also designed Bcl-xL mutants which cannot dimerize and show that these mutants reduced mitochondrial calcium uptake in MEF cells. This illustrates the structural plasticity in Bcl-xL providing hints toward the probable molecular mechanism for Bcl-xL to play a regulatory role in mitochondrial calcium ion transport.
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DOI:
10.1107/s0907444905036693
发表时间:
2006-01-01
影响因子:
2.2
作者:
Evans, P
通讯作者:
Evans, P
DOI:
10.1107/s0907444904019158
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2004-12-01
影响因子:
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影响因子:
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作者:
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DOI:
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发表时间:
1997-04-15
影响因子:
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作者:
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