Dynamics of nuclear pore distribution in nucleoporin mutant yeast cells.
J Cell Biol
; 136(4): 747-59, 1997 Feb 24.
Article
em En
| MEDLINE
| ID: mdl-9049242
ABSTRACT
To follow the dynamics of nuclear pore distribution in living yeast cells, we have generated fusion proteins between the green fluorescent protein (GFP) and the yeast nucleoporins Nup49p and Nup133p. In nup133- dividing cells that display a constitutive nuclear pore clustering, in vivo analysis of GFP-Nup49p localization revealed changes in the distribution of nuclear pore complex (NPC) clusters. Furthermore, upon induction of Nup133p expression in a GAL-nup133 strain, a progressive fragmentation of the NPC aggregates was observed that in turn led to a wild-type nuclear pore distribution. To try to uncouple Nup133p-induced NPC redistribution from successive nuclear divisions and nuclear pore biogenesis, we devised an assay based on the formation of heterokaryons between nup133- mutants and cells either expressing or overexpressing Nup133p. Under these conditions, the use of GFP-Nup133p and GFP-Nup49p fusion proteins revealed that Nup133p can be rapidly targeted to the clustered nuclear pores, where its amino-terminal domain is required to promote the redistribution of preexisting NPCs.
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Base de dados:
MEDLINE
Assunto principal:
Saccharomyces cerevisiae
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Proteínas Fúngicas
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Proteínas Nucleares
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Complexo de Proteínas Formadoras de Poros Nucleares
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Proteínas de Saccharomyces cerevisiae
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Proteínas de Membrana
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Mutação
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Membrana Nuclear
Idioma:
En
Ano de publicação:
1997
Tipo de documento:
Article