The fission yeast transforming acidic coiled coil-related protein Mia1p/Alp7p is required for formation and maintenance of persistent microtubule-organizing centers at the nuclear envelope. Export

@article{citeulike:1445556, abstract = {Microtubule-organizing centers (MTOCs) concentrate microtubule nucleation, attachment and bundling factors and thus restrict formation of microtubule arrays in spatial and temporal manner. How MTOCs occur remains an exciting question in cell biology. Here, we show that the transforming acidic coiled coil-related protein Mia1p/Alp7p functions in emergence of large MTOCs in interphase fission yeast cells. We found that Mia1p was a microtubule-binding protein that preferentially localized to the minus ends of microtubules and was associated with the sites of microtubule attachment to the nuclear envelope. Cells lacking Mia1p exhibited less microtubule bundles. Microtubules could be nucleated and bundled but were frequently released from the nucleation sites in mia1delta cells. Mia1p was required for stability of microtubule bundles and persistent use of nucleation sites both in interphase and postanaphase array dynamics. The gamma-tubulin-rich material was not organized in large perinuclear or microtubule-associated structures in mia1delta cells. Interestingly, absence of microtubules in dividing wild-type cells prevented appearance of large gamma-tubulin-rich MTOC structures in daughters. When microtubule polymerization was allowed, MTOCs were efficiently assembled de novo. We propose a model where MTOC emergence is a self-organizing process requiring the continuous association of microtubules with nucleation sites.}, address = {Cell Dynamics Group, Temasek Life Sciences Laboratory, 117604 Singapore, Singapore.}, author = {Zheng, L. and Schwartz, C. and Wee, L. and Oliferenko, S.}, citeulike-article-id = {1445556}, citeulike-linkout-0 = {http://dx.doi.org/10.1091/mbc.E05-08-0811}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/16481403}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=16481403}, doi = {10.1091/mbc.E05-08-0811}, issn = {1059-1524}, journal = {Mol Biol Cell}, keywords = {alp7p, mia1p, microtubule, mtoc, ne}, month = {May}, number = {5}, pages = {2212--2222}, posted-at = {2007-07-10 07:38:31}, priority = {5}, title = {The fission yeast transforming acidic coiled coil-related protein Mia1p/Alp7p is required for formation and maintenance of persistent microtubule-organizing centers at the nuclear envelope.}, url = {http://dx.doi.org/10.1091/mbc.E05-08-0811}, volume = {17}, year = {2006} }

TY - JOUR ID - citeulike:1445556 L3 - citeulike-article-id:1445556 N2 - Microtubule-organizing centers (MTOCs) concentrate microtubule nucleation, attachment and bundling factors and thus restrict formation of microtubule arrays in spatial and temporal manner. How MTOCs occur remains an exciting question in cell biology. Here, we show that the transforming acidic coiled coil-related protein Mia1p/Alp7p functions in emergence of large MTOCs in interphase fission yeast cells. We found that Mia1p was a microtubule-binding protein that preferentially localized to the minus ends of microtubules and was associated with the sites of microtubule attachment to the nuclear envelope. Cells lacking Mia1p exhibited less microtubule bundles. Microtubules could be nucleated and bundled but were frequently released from the nucleation sites in mia1delta cells. Mia1p was required for stability of microtubule bundles and persistent use of nucleation sites both in interphase and postanaphase array dynamics. The gamma-tubulin-rich material was not organized in large perinuclear or microtubule-associated structures in mia1delta cells. Interestingly, absence of microtubules in dividing wild-type cells prevented appearance of large gamma-tubulin-rich MTOC structures in daughters. When microtubule polymerization was allowed, MTOCs were efficiently assembled de novo. We propose a model where MTOC emergence is a self-organizing process requiring the continuous association of microtubules with nucleation sites. IS - 5 JF - Mol Biol Cell SN - 1059-1524 AD - Cell Dynamics Group, Temasek Life Sciences Laboratory, 117604 Singapore, Singapore. EP - 2222 TI - The fission yeast transforming acidic coiled coil-related protein Mia1p/Alp7p is required for formation and maintenance of persistent microtubule-organizing centers at the nuclear envelope. VL - 17 SP - 2212 KW - alp7p KW - mia1p KW - microtubule KW - mtoc KW - ne AU - Zheng, L AU - Schwartz, C AU - Wee, L AU - Oliferenko, S PY - 2006/05// UR - http://dx.doi.org/10.1091/mbc.E05-08-0811 ER -