MCAK is present at centromeres, midspindle and chiasmata and involved in silencing of the spindle assembly checkpoint in mammalian oocytes

Vogt E, Sanhaji M, Klein W, Seidel T, Wordeman L, Eichenlaub-Ritter U (2010)
MOLECULAR HUMAN REPRODUCTION 16(9): 665-684.

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Abstract
Mitotic centromere-associated kinesin (MCAK) is an ATP-dependent microtubule (MT) depolymerase regulated by Aurora kinase (AURK) phosphorylation and implicated in resolution of improper MT attachments in mitosis. Distribution of MCAK was studied in oocyte maturation by anti-MCAK antibody, anti-tubulin antibody, anti-AURKB antibody and anti-centromere antibody (ACA) and by the expression of MCAK-enhanced green fluorescent protein fusion protein in maturing mouse oocytes. Function was assessed by knockdown of MCAK and Mad2, by inhibiting AURK or the proteasome, by live imaging with polarization microscope and by chromosomal analysis. The results show that MCAK is transiently recruited to the nucleus and transits to spindle poles, ACA-positive domains and chiasmata at prometaphase I. At metaphase I and II, it is present at centrosomes and centromeres next to AURKB and checkpoint proteins Mad2 and BubR1. It is retained at centromeres at telophase I and also at the midbody. Knockdown of MCAK causes a delay in chromosome congression but does not prevent bipolar spindle assembly. MCAK knockdown also induces a meiosis I arrest, which is overcome by knockdown of Mad2 resulting in chiasma resolution, chromosome separation, formation of aberrant meiosis II spindles and increased hypoploidy. In conclusion, MCAK appears to possess a unique distribution and function in oocyte maturation. It is required for meiotic progression from meiosis I to meiosis II associated with silencing of the spindle assembly checkpoint. Alterations in abundance and activity of MCAK, as implicated in aged oocytes, may therefore contribute to the loss of control of cell cycle and chromosome behaviour, thus increasing risk for errors in chromosome segregation and aneuploidy.
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Vogt E, Sanhaji M, Klein W, Seidel T, Wordeman L, Eichenlaub-Ritter U. MCAK is present at centromeres, midspindle and chiasmata and involved in silencing of the spindle assembly checkpoint in mammalian oocytes. MOLECULAR HUMAN REPRODUCTION. 2010;16(9):665-684.
Vogt, E., Sanhaji, M., Klein, W., Seidel, T., Wordeman, L., & Eichenlaub-Ritter, U. (2010). MCAK is present at centromeres, midspindle and chiasmata and involved in silencing of the spindle assembly checkpoint in mammalian oocytes. MOLECULAR HUMAN REPRODUCTION, 16(9), 665-684. doi:10.1093/molehr/gaq025
Vogt, E., Sanhaji, M., Klein, W., Seidel, T., Wordeman, L., and Eichenlaub-Ritter, U. (2010). MCAK is present at centromeres, midspindle and chiasmata and involved in silencing of the spindle assembly checkpoint in mammalian oocytes. MOLECULAR HUMAN REPRODUCTION 16, 665-684.
Vogt, E., et al., 2010. MCAK is present at centromeres, midspindle and chiasmata and involved in silencing of the spindle assembly checkpoint in mammalian oocytes. MOLECULAR HUMAN REPRODUCTION, 16(9), p 665-684.
E. Vogt, et al., “MCAK is present at centromeres, midspindle and chiasmata and involved in silencing of the spindle assembly checkpoint in mammalian oocytes”, MOLECULAR HUMAN REPRODUCTION, vol. 16, 2010, pp. 665-684.
Vogt, E., Sanhaji, M., Klein, W., Seidel, T., Wordeman, L., Eichenlaub-Ritter, U.: MCAK is present at centromeres, midspindle and chiasmata and involved in silencing of the spindle assembly checkpoint in mammalian oocytes. MOLECULAR HUMAN REPRODUCTION. 16, 665-684 (2010).
Vogt, E., Sanhaji, M., Klein, W., Seidel, Thorsten, Wordeman, L., and Eichenlaub-Ritter, Ursula. “MCAK is present at centromeres, midspindle and chiasmata and involved in silencing of the spindle assembly checkpoint in mammalian oocytes”. MOLECULAR HUMAN REPRODUCTION 16.9 (2010): 665-684.
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