Myosin V orientates the mitotic spindle in yeast

Coordination of spindle orientation with the axis of cell division is an essential process in all eukaryotes. In addition to ensuring accurate chromosomal segregation, proper spindle orientation also establishes differential cell fates and proper morphogenesis 1 . In both animal and yeast cells, thi...

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Veröffentlicht in:Nature (London) 2000-08, Vol.406 (6799), p.1013-1015
Hauptverfasser: Yin, Hongwei, Pruyne, David, Huffaker, Tim C., Bretscher, Anthony
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creator Yin, Hongwei
Pruyne, David
Huffaker, Tim C.
Bretscher, Anthony
description Coordination of spindle orientation with the axis of cell division is an essential process in all eukaryotes. In addition to ensuring accurate chromosomal segregation, proper spindle orientation also establishes differential cell fates and proper morphogenesis 1 . In both animal and yeast cells, this process is dependent on cytoplasmic microtubules interacting with the cortical actin-based cytoskeleton 2 , 3 , 4 , 5 , although the motive force was unknown. Here we show that yeast Myo2, a myosin V that translocates along polarized actin cables into the bud 6 , orientates the spindle early in the cell cycle by binding and polarizing the microtubule-associated protein Kar9 (refs 7 , 8 , 9 ). The tail domain of Myo2 that binds Kar9 also interacts with secretory vesicles 12 and vacuolar elements 13 , making it a pivotal component of yeast cell polarization.
doi_str_mv 10.1038/35023024
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subjects Actins - metabolism
Biological and medical sciences
Carrier Proteins - metabolism
Carrier Proteins - physiology
Cell Cycle
Cell division
Cells
Fundamental and applied biological sciences. Psychology
Growth, nutrition, metabolism, transports, enzymes. Molecular biology
Humanities and Social Sciences
Kar9 protein
letter
Medical research
Microbiology
Microtubule-Associated Proteins - metabolism
Microtubules - metabolism
multidisciplinary
Mycology
Myo2 protein
Myosin Heavy Chains
Myosin Type II
Myosin Type V
myosin V
Myosins - metabolism
Myosins - physiology
Nuclear Proteins - metabolism
Protein Binding
Protein Structure, Tertiary
Saccharomyces cerevisiae
Saccharomyces cerevisiae Proteins
Saccharomycetales
Schizosaccharomyces pombe Proteins
Science
Science (multidisciplinary)
Spindle Apparatus - physiology
Two-Hybrid System Techniques
Yeast
Yeasts
title Myosin V orientates the mitotic spindle in yeast
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