Astral microtubules are not required for anaphase B in Saccharomyces cerevisiae.

@article{citeulike:2653568, abstract = {tub2-401 is a cold-sensitive allele of TUB2, the sole gene encoding beta-tubulin in the yeast, Saccharomyces cerevisiae. At 18 degrees C, tub2-401 cells are able to assemble spindle microtubules but lack astral microtubules. Under these conditions, movement of the spindle to the bud neck is blocked. However, spindle elongation and chromosome separation are unimpeded and occur entirely within the mother cell. Subsequent cytokinesis produces one cell with two nuclei and one cell without a nucleus. The anucleate daughter can not bud. The binucleate daughter proceeds through another cell cycle to produce a cell with four nuclei and another anucleate cell. With additional time in the cold, the number of nuclei in the nucleated cells continues to increase and the percentage of anucleate cells in the population rises. The results indicate that astral microtubules are needed to position the spindle in the bud neck but are not required for spindle elongation at anaphase B. In addition, cell cycle progression does not depend on the location or orientation of the spindle.}, address = {Section of Biochemistry, Molecular and Cell Biology, Cornell University, Ithaca, New York 14853.}, author = {Sullivan, D. S. and Huffaker, T. C.}, citeulike-article-id = {2653568}, issn = {0021-9525}, journal = {The Journal of cell biology}, keywords = {anucleation, budding, yeast}, month = {October}, number = {2}, pages = {379--388}, posted-at = {2008-04-11 12:50:46}, priority = {2}, title = {Astral microtubules are not required for anaphase B in Saccharomyces cerevisiae.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/1400581}, volume = {119}, year = {1992} }

TY - JOUR ID - citeulike:2653568 L3 - citeulike-article-id:2653568 N2 - tub2-401 is a cold-sensitive allele of TUB2, the sole gene encoding beta-tubulin in the yeast, Saccharomyces cerevisiae. At 18 degrees C, tub2-401 cells are able to assemble spindle microtubules but lack astral microtubules. Under these conditions, movement of the spindle to the bud neck is blocked. However, spindle elongation and chromosome separation are unimpeded and occur entirely within the mother cell. Subsequent cytokinesis produces one cell with two nuclei and one cell without a nucleus. The anucleate daughter can not bud. The binucleate daughter proceeds through another cell cycle to produce a cell with four nuclei and another anucleate cell. With additional time in the cold, the number of nuclei in the nucleated cells continues to increase and the percentage of anucleate cells in the population rises. The results indicate that astral microtubules are needed to position the spindle in the bud neck but are not required for spindle elongation at anaphase B. In addition, cell cycle progression does not depend on the location or orientation of the spindle. IS - 2 JF - The Journal of cell biology SN - 0021-9525 AD - Section of Biochemistry, Molecular and Cell Biology, Cornell University, Ithaca, New York 14853. EP - 388 TI - Astral microtubules are not required for anaphase B in Saccharomyces cerevisiae. VL - 119 SP - 379 KW - anucleation KW - budding KW - yeast AU - Sullivan, DS AU - Huffaker, TC PY - 1992/10// UR - http://view.ncbi.nlm.nih.gov/pubmed/1400581 ER -