What is the role of BCL-2?
What is the role of BCL-2?
BCL-2 family proteins are the regulators of apoptosis, but also have other functions. This family of interacting partners includes inhibitors and inducers of cell death. Together they regulate and mediate the process by which mitochondria contribute to cell death known as the intrinsic apoptosis pathway.
Which is the anti apoptotic BCL-2 proteins?
The main function of anti-apoptotic BCL-2 proteins is to restrain pro-apoptotic BAX/BAK, thus preserving mitochondrial outer membrane integrity. Upon stress these proteins, transcriptionally induced or post-transcriptionally activated, bind anti-apoptotic members thereby unleashing BAX/BAK from their restraint.
What is the role of BCL-2 in apoptosis?
BCL2 prevents BAX/BAK oligomerization, which would otherwise lead to the release of several apoptogenic molecules from the mitochondrion. It is also known that BCL2 binds to and inactivates BAX and other pro-apoptotic proteins, thereby inhibiting apoptosis.
How BCL-2 can induce or inhibit cell death?
Bcl-2 inhibits apoptosis by increasing the time-to-death and intrinsic cell-to-cell variations in the mitochondrial pathway of cell death. Apoptosis.
Where is Bcl-2 protein found?
mitochondria
BCL-2 is localized to the outer membrane of mitochondria, where it plays an important role in promoting cellular survival and inhibiting the actions of pro-apoptotic proteins.
How do Bcl-2 family members regulate Apoptosome formation?
The anti-apoptotic members of this family, such as Bcl-2 and Bcl-xL, prevent apoptosis either by sequestering proforms of death-driving cysteine proteases called caspases (a complex called the apoptosome) or by preventing the release of mitochondrial apoptogenic factors such as cytochrome c and AIF (apoptosis-inducing …
What are Bcl-2 inhibitors?
A selective inhibitor of the anti-apoptotic protein B-cell lymphoma 2 (Bcl-2), with potential pro-apoptotic and antineoplastic activities. Upon administration, Bcl-2 inhibitor BCL201 binds to and inhibits the activity of Bcl-2. This restores apoptotic processes in tumor cells.
How was BCL2 discovered?
BCL2 was originally identified in Croce’s lab in 1984 as the target within the breakpoint region of the t(14;18) translocation carried by patients with the follicular variant of B-cell lymphoma, from which it takes its name.
What is the apoptosis pathway?
The two main pathways of apoptosis are extrinsic and intrinsic as well as a perforin/granzyme pathway. Each requires specific triggering signals to begin an energy-dependent cascade of molecular events. Each pathway activates its own initiator caspase (8, 9, 10) which in turn will activate the executioner caspase-3.
