MULTIPLE BCL-2 FAMILY MEMBERS DEMONSTRATE SELECTIVE DIMERIZATIONS WITH BAX

MULTIPLE BCL-2 FAMILY MEMBERS DEMONSTRATE SELECTIVE DIMERIZATIONS WITH BAX
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DOI:
10.1073/pnas.92.17.7834
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发表时间:
1995-08-15
影响因子:
11.1
通讯作者:
KORSMEYER, SJ
KORSMEYER, SJ
中科院分区:
综合性期刊1区
文献类型:
--
作者:
SEDLAK, TW;OLTVAI, ZN;KORSMEYER, SJ

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Bcl-2 相关蛋白家族调节细胞死亡并共享高度保守的 BH1 和 BH2 结构域,Bcl-2 的 BH1 和 BH2 结构域是 Bcl-2 与 Bax 异二聚化并抑制细胞凋亡所必需的。酵母双杂交测定准确地再现了这种相互作用,并定义了进一步二化的选择性和层次结构,Bax 还与 Bcl-x(L)、Mcl-1 和 A1 形成异二聚体。 Bcl-x(L) 的 BH1 中的 Gly-159 --> Ala 取代破坏了其与 Bax 的异二聚化,并消除了其对哺乳动物细胞凋亡的抑制作用。这表明细胞凋亡的易感性是由多个竞争性二聚化决定的,其中 Bax 可能是一个共同的伙伴。
A family of Bcl-2-related proteins regulates cell death and shares highly conserved BH1 and BH2 domains, BH1 and BH2 domains of Bcl-2 were required for it to heterodimerize with Bax and to repress apoptosis. A yeast two-hybrid assay accurately reproduced this interaction and defined a selectivity and hierarchy of further dinerizations, Bax also heterodimerizes with Bcl-x(L), Mcl-1, and A1. A Gly-159 --> Ala substitution in BH1 of Bcl-x(L), disrupted its heterodimerization with Bax and abrogated its inhibition of apoptosis in mammalian cells. This suggests that the susceptibility to apoptosis is determined by multiple competing dimerizations in which Bax may be a common partner.