MCL1 phospho S159
Function
Involved in the regulation of apoptosis versus cell survival, and in the maintenance of viability but not of proliferation. Mediates its effects by interactions with a number of other regulators of apoptosis. Isoform 1 inhibits apoptosis. Isoform 2 promotes apoptosis.
Post-translational modifications
Cleaved by CASP3 during apoptosis. In intact cells cleavage occurs preferentially after Asp-127, yielding a pro-apoptotic 28 kDa C-terminal fragment.
Rapidly degraded in the absence of phosphorylation on Thr-163 in the PEST region.
Phosphorylated on Ser-159, by GSK3, in response to IL3/interleukin-3 withdrawal. Phosphorylation at Ser-159 induces ubiquitination and proteasomal degradation, abrogating the anti-apoptotic activity. Treatment with taxol or okadaic acid induces phosphorylation on additional sites.
Ubiquitinated. Ubiquitination is induced by phosphorylation at Ser-159 (PubMed:16543145). Deubiquitinated by USP20; leading to increased stability (PubMed:35063767).
Sequence Similarities
Belongs to the Bcl-2 family.
Cellular localization
- Membrane
- Single-pass membrane protein
- Cytoplasm
- Mitochondrion
- Nucleus
- Nucleoplasm
- Cytoplasmic, associated with mitochondria.
Alternative names
BCL2L3, MCL1, Induced myeloid leukemia cell differentiation protein Mcl-1, Bcl-2-like protein 3, Bcl-2-related protein EAT/mcl1, mcl1/EAT, Bcl2-L-3