Abstract:
:The Bcl-2 family proteins are key regulators of apoptosis in human diseases and cancers. Though known to block apoptosis, Bcl-2 promotes cell death through an undefined mechanism. Here, we show that Bcl-2 interacts with orphan nuclear receptor Nur77 (also known as TR3), which is required for cancer cell apoptosis induced by many antineoplastic agents. The interaction is mediated by the N-terminal loop region of Bcl-2 and is required for Nur77 mitochondrial localization and apoptosis. Nur77 binding induces a Bcl-2 conformational change that exposes its BH3 domain, resulting in conversion of Bcl-2 from a protector to a killer. These findings establish the coupling of Nur77 nuclear receptor with the Bcl-2 apoptotic machinery and demonstrate that Bcl-2 can manifest opposing phenotypes, induced by interactions with proteins such as Nur77, suggesting novel strategies for regulating apoptosis in cancer and other diseases.
journal_name
Celljournal_title
Cellauthors
Lin B,Kolluri SK,Lin F,Liu W,Han YH,Cao X,Dawson MI,Reed JC,Zhang XKdoi
10.1016/s0092-8674(04)00162-xsubject
Has Abstractpub_date
2004-02-20 00:00:00pages
527-40issue
4eissn
0092-8674issn
1097-4172pii
S009286740400162Xjournal_volume
116pub_type
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