NMR studies of interactions between Bax and BH3 domain-containing peptides in the absence and presence of CHAPS.
NMR studies of interactions between Bax and BH3 domain-containing peptides in the absence and presence of CHAPS.
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在 CHAPS 不存在和存在的情况下 Bax 和含 BH3 结构域的肽之间相互作用的 NMR 研究
DOI:
10.1016/j.abb.2014.01.003
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发表时间:
2014
影响因子:
3.9
通讯作者:
Czabotar P.E.
中科院分区:
文献类型:
--
作者:
Westphal D;Babon J.J;Thompson G.V;Robin A.Y;Adams J.M;Colman P.M;Czabotar P.E.
Activation and oligomerisation of Bax, a key pro-apoptotic Bcl-2 family protein, are key steps in the mitochondrial pathway to apoptosis. The signals for apoptosis are conveyed by the distantly related BH3-only proteins, which use their short BH3 domain, an amphipathic α-helix, to interact with other Bcl-2 family members. Here we report an NMR study of interactions between BaxΔC and BH3 domain-containing peptides in the absence and presence of CHAPS, a zwitterionic detergent. We find for the first time that CHAPS interacts weakly with BaxΔC (fast exchange on the NMR chemical shift timescale), at concentrations below micelle formation and with an estimatedKdin the tens of mM. Direct and relatively strong-interactions (slow exchange on the NMR chemical shift timescale) were also observed for BaxΔC with BaxBH3 (estimatedKdof circa 150 μM) or BimBH3 in the absence of CHAPS. The interaction with either peptide alone induced widespread chemical shift perturbations to BaxΔC in solution which implies that BaxΔC might have undergone significant conformation change upon binding the BH3 peptide. However, BaxΔC remained monomeric upon binding either CHAPS or a BH3 peptide alone, but the presence of both provoked it to form a dimer.
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影响因子:
32.4
作者:
Liu, XQ;Dai, SD;Kappler, JW
通讯作者:
Kappler, JW
影响因子:
2.2
作者:
de la Torre, JG;Huertas, ML;Carrasco, B
通讯作者:
Carrasco, B
影响因子:
16
作者:
Llambi F;Moldoveanu T;Tait SW;Bouchier-Hayes L;Temirov J;McCormick LL;Dillon CP;Green DR
通讯作者:
Green DR
影响因子:
16
作者:
Walensky, Loren D.;Pitter, Kenneth;Korsmeyer, Stanley J.
通讯作者:
Korsmeyer, Stanley J.
影响因子:
3.8
作者:
S. Yao;J. Babon;R. Norton
通讯作者:
R. Norton