Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10216/53507
Autor(es): | Efimov, A Kharitonov, A Efimova, N Loncarek, J Miller, PM Andreyeva, N Gleeson, P Galjart, N Maia, ARR McLeod, IX Yates, JR Khodjakov, A Maiato, H Akhmanova, A Kaverina, I |
Título: | Asymmetric CLASP-dependent nucleation of noncentrosomal microtubules at the trans-Golgi network |
Outro Título: | CLASP-dependent microtubule nucleation at the TGN |
Data de publicação: | 2007 |
Resumo: | Proper organization of microtubule arrays is essential for intracellular trafficking and cell motility. It is generally assumed that most if not all microtubules in vertebrate somatic cells are formed by the centrosome. Here we demonstrate that a large number of microtubules in untreated human cells originate from the Golgi apparatus in a centrosome-independent manner. Both centrosomal and Golgi-emanating microtubules need γ-tubulin for nucleation. Additionally, formation of microtubules at the Golgi requires CLASPs, microtubule-binding proteins that selectively coat non-centrosomal microtubule seeds. We show that CLASPs are recruited to trans-Golgi network (TGN) at the Golgi periphery by the TGN protein GCC185. In sharp contrast to radial centrosomal arrays, microtubules nucleated at the peripheral Golgi compartment are preferentially oriented toward the leading edge in motile cells. We propose that Golgi–emanating microtubules contribute to the asymmetric microtubule networks in polarized cells and support diverse processes including post-Golgi transport to the cell front. |
URI: | http://hdl.handle.net/10216/53507 |
Ligação ao Catálogo: | http://dx.doi.org/1016/j.devcel.2007.04.002 |
Fonte: | Developmental cell, vol. 12(6), p. 917-930 |
Tipo de Documento: | Artigo em Revista Científica Internacional |
Condições de Acesso: | openAccess |
Aparece nas coleções: | I3S - Artigo em Revista Científica Internacional |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Asymmetric CLASP-dependent nucleation of noncentrosomal.pdf | 1.28 MB | Adobe PDF | Ver/Abrir |
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