Inactivation of Bcl-2 by phosphorylation.
basic_science · Level V
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- Record sourced from PubMed, PMID 7753834.
- Also identified by PMC identifier 41973.
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Abstract
The antiapoptosis potential of Bcl-2 protein is well established, but the mechanism of Bcl-2 action is still poorly understood. Using the phosphatase inhibitor okadaic acid or the chemotherapeutic drug taxol, we found that Bcl-2 was phosphorylated in lymphoid cells. Phospho amino acid analysis revealed that Bcl-2 was phosphorylated on serine. Under similar conditions, okadaic acid or taxol treatment led to the induction of apoptosis in these cells. Thus, phosphorylation of Bcl-2 seems to inhibit its ability to interfere with apoptosis. In addition, phosphorylated Bcl-2 can no longer prevent lipid peroxidation as required to protect cells from apoptosis.
Medical subject headings
- Ethers, Cyclic
- Lipid Peroxidation
- Paclitaxel
- Phosphoprotein Phosphatases
- Proto-Oncogene Proteins