How is PTEN activated?
PTEN works in direct opposition to PI3K, dephosphorylating PIP3 to PIP2. AKT binds to PIP3 and is activated by phosphorylation on threonine (T)308 by PDK1 and serine (S)473 by mTORC2. AKT phosphorylates and inactivates many downstream targets, resulting in increased cellular survival and proliferation.
How is PTEN mutation treated?
People with a PTEN mutation who have metastatic triple-negative breast cancer may qualify for this study. Talazoparib ( Talzenna ) is a type of treatment known as a PARP inhibitor, which is approved for metastatic breast cancer in people with a BRCA mutation.
What is the abnormal function of PTEN?
PTEN acts as a tumor suppressor gene through the action of its phosphatase protein product. This phosphatase is involved in the regulation of the cell cycle, preventing cells from growing and dividing too rapidly. It is a target of many anticancer drugs….PTEN (gene)
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What is PTEN tumor syndrome?
The PTEN hamartoma tumor syndrome (PHTS) is a spectrum of disorders caused by mutations of the PTEN tumor suppressor gene in egg or sperm cells (germline). These disorders are characterized by multiple hamartomas that can affect various areas of the body.
What type of protein is PTEN?
PTEN is a 403-amino acid protein that shares sequence homology with tensin and auxilin at its amino-terminal. The hosphatase domain (PTPase) contains the signature CX5R (HCKAGKGR) p-loop structure for phosphatases. The C2 domain contains the affinity for phospho-lipids.
What is the normal function of PTEN?
PTEN acts as a tumor suppressor gene through the action of its phosphatase protein product. This phosphatase is involved in the regulation of the cell cycle, preventing cells from growing and dividing too rapidly. It is a target of many anticancer drugs.
What is the PTEN pathway?
PTEN is a novel tumour suppressor gene located on chromosome 10. PTEN mutations are believed to exert their effects through the putative PI3K-AKT-mTOR signalling pathway.
What is PTEN binding?
PTEN binds to BMI1 exclusively in the nucleus and reduces its function. This interaction does not require the phosphatase activity of PTEN (189). Phosphatase and tensin homolog on chromosome 10 was also shown to negatively regulate the expression of oncogenic miR-21 at the post-transcriptional level.