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Abstract A broad spectrum of mutations in PTEN, encoding a lipid phosphatase that inactivates the P13-K/AKT pathway, is found associated with primary tumors. Some of these mutations occur outside the phosphatase domain, suggesting that additional activities of PTEN function in tumor suppression. We report a nuclear function for PTEN in controlling chromosomal integrity. Disruption of Pten leads to extensive centromere breakage and chromosomal translocations. PTEN was found localized at centromeres and physically associated with CENP-C, an integral component of the kinetochore. C-terminal PTEN mutants disrupt the association of PTEN with centromeres and cause centromeric instability. Furthermore, Pten null cells exhibit spontaneous DNA double-strand breaks (DSBs). We show that PTEN acts on......
来源出处
Shen WH, Balajee AB, Wang J, Wu H, Eng C, Pandolfi PP, Yin Y*.Essential role fo…
http://218.241.158.84:8088/Research/Articles/index776.shtml
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