Results 271 to 280 of about 27,281 (320)
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Microtubule-organizing centers in higher plants
Current Opinion in Cell Biology, 1993Compelling evidence has recently been obtained for the idea that the nuclear surface of higher plant cells has a microtubule-nucleating function under cell cycle dependent control. Whatever the final organization of microtubules, they all seem to originate in the nuclear periphery.
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Microtubule organizing centers and γ-tubulin
Current Opinion in Cell Biology, 1994The polar assembly of cellular microtubules is organized by microtubule organizing centers (MTOCs). Eukaryotic cells across different species, and different cell types within single species, have morphologically diverse MTOCs, which have the common function of organizing microtubule arrays by initiating microtubule assembly and anchoring microtubules ...
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Cytoplasmic Microtubule Organizing Centers Isolated from Polytomella agilis
Science, 1976Basal body rootlets in Polytomella function as organizing centers for cytoplasmic microtubules in vivo. A method is described to isolate intact basal body-rootlet complexes. The integrity of the isolated complexes is confirmed by electron microscopy, and the rootlets are shown to be competent as initiation sites for
M E, Stearns, J A, Connolly, D L, Brown
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Unravelling the tangled web at the microtubule-organizing center
Current Opinion in Cell Biology, 1993The last year has seen dramatic progress in the use of genetic and biochemical approaches to identify microtubule-organizing center components. The use of vertebrate and invertebrate egg extracts has allowed the development of novel assays for centrosome duplication and activation.
M D, Rose, S, Biggins, L L, Satterwhite
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Nonlocal Mechanism of Self-Organization and Centering of Microtubule Asters
Bulletin of Mathematical Biology, 2006Fragments of fish melanophore cells can form and center aggregates of pigment granules by dynein-motor-driven transport along a self-organized radial array of microtubules (MTs). We present a quantitative model that describes pigment aggregation and MT-aster self-organization and the subsequent centering of both structures.
Cytrynbaum, E. N. +2 more
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Fungal microtubule organizing centers are evolutionarily unstable structures
Fungal Genetics and BiologyFor most Eukaryotic species the requirements of cilia formation dictate the structure of microtubule organizing centers (MTOCs). In this study we find that loss of cilia corresponds to loss of evolutionary stability for fungal MTOCs. We used iterative search algorithms to identify proteins homologous to those found in Saccharomyces cerevisiae, and ...
Adam, Grazzini, Ann M, Cavanaugh
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Microtubule-Organizing Centers of the Mitotic Spindle
1977Discussions of the regulation of microtubule assembly generally have had a dual aspect. Firstly, they have been in terms of the extent of assembly; that is, in terms of whether and to what degree assembly is favoured or not. Secondly, and of equal significance to the amount of microtubules, discussions have focused on their spatial distribution within ...
G. G. Borisy, R. R. Gould, H. Ponstingl
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Microtubule-Organizing Centers and Nucleating Sites in Land Plants
1998Microtubule-organizing centers (MTOCs) are morphologically diverse cellular sites involved in the nucleation and organization of microtubules (MTs). These structures are synonymous with the centrosome in mammalian cells. In most land plant cells, however, no such structures are observed and some have argued that plant cells may not have MTOCs.
K C, Vaughn, J D, Harper
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Cell Motility, 1982
AbstractNucleus associated bodies (NABs) were isolated from Dictyostelium discoideum or Dictyostelium mucoroides and their ability to nucleate microtubules in vitro was examined.NABs were localized at the tapered ends of the nuclei and released from lysed cells in complex with the nuclei.
R, Kuriyama +3 more
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AbstractNucleus associated bodies (NABs) were isolated from Dictyostelium discoideum or Dictyostelium mucoroides and their ability to nucleate microtubules in vitro was examined.NABs were localized at the tapered ends of the nuclei and released from lysed cells in complex with the nuclei.
R, Kuriyama +3 more
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Peroxynitrite deteriorates oocyte quality through disassembly of microtubule organizing centers
Free Radical Biology and Medicine, 2016Previous theoretical studies have suggested that utilization of 3-D imaging to acquire morphologic parameters of meiotic spindles may be useful in infertility related procedures as an assessment of oocyte quality. However, our results show that treatment of oocytes with increasing concentrations of peroxynitrite (ONOO(-)) caused a dramatic alteration ...
Sana N, Khan +6 more
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