An auxiliary, membrane-based mechanism for nuclear migration in budding yeast

• Verfasst von: Kirchenbauer, Marisa [VerfasserIn]
• Verfasst von: Liakopoulos, Dimitris [VerfasserIn]
• Titel: An auxiliary, membrane-based mechanism for nuclear migration in budding yeast
• Verf.angabe: Marisa Kirchenbauer and Dimitris Liakopoulos
• E-Jahr: 2013
• Jahr: February 27, 2013
• Umfang: 10 S.
• Fussnoten: Gesehen am 22.06.2022
• Titel Quelle: Enthalten in: Molecular biology of the cell
• Ort Quelle: Bethesda, Md. : American Society for Cell Biology, 1992
• Jahr Quelle: 2013
• Band/Heft Quelle: 24(2013), 9, Seite 1434-1443
• ISSN Quelle: 1939-4586
• DOI: doi:10.1091/mbc.e12-08-0602
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1751430588

Abstract

How nuclear shape correlates with nuclear movements during the cell cycle is poorly understood. We investigated changes in nuclear morphology during nuclear migration in budding yeast. In preanaphase cells, nuclear protrusions (nucleopodia [NP]) extend into the bud, preceding insertion of chromosomes into the bud neck. Surprisingly, formation of nucleopodia did not depend on the established nuclear migration pathways. We show that generation and maintenance of NP requires nuclear membrane expansion, actin, and the exocyst complex. Exocyst mutations cause nuclear positioning defects and display genetic interactions with mutations that deactivate astral microtubule-dependent nuclear migration. Cells that cannot perform DNA replication also fail to form nucleopodia. We propose that nuclear membrane expansion, DNA replication, and exocyst-dependent anchoring of the nuclear envelope to the bud affect nuclear morphology and facilitate correct positioning of nucleus and chromosomes relative to the cleavage apparatus.