کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10756501 | 1050383 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sirt3 controls chromosome alignment by regulating spindle dynamics during mitosis
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
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چکیده انگلیسی
Sirt3, one of mammalian sirtuins is a prominent mitochondrial deacetylase that controls mitochondrial oxidative pathways and the rate of reactive oxygen species. Sirt3 also regulates energy metabolism by deacetylating enzymes involved in the metabolic pathway related with lifespan. We report here a novel function of Sirt3 which was found to be involved in mitosis. Depletion of the Sirt3 protein generated unaligned chromosomes in metaphase which caused mitotic arrest by activating spindle assembly checkpoint (SAC). Furthermore, the shape and the amount of the spindles in Sirt3 depleted cells were abnormal. Microtubule (MT) polymerization also increased in Sirt3 depleted cells, suggesting that Sirt3 is involved in spindle dynamics. However, the level of acetylated tubulin was not increased significantly in Sirt3 depleted cells. The findings collectively suggest that Sirt3 is not a tubulin deacetylase but regulates the attachment of spindle MTs to the kinetochore and the subsequent chromosome alignment by increasing spindle dynamics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 444, Issue 4, 21 February 2014, Pages 662-669
Journal: Biochemical and Biophysical Research Communications - Volume 444, Issue 4, 21 February 2014, Pages 662-669
نویسندگان
Byung-Soo Choi, Ji Eun Park, Chang-Young Jang,