Linked Life Data

9855114

Source:http://linkedlifedata.com/resource/pubmed/id/9855114

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1999-2-2
pubmed:abstractText
Microtubule-associated proteins (MAPs) promote the assembly of microtubules from purified tubulin in vitro. In order to establish a model system for the investigation of the role of MAPs in microtubule assembly in vivo, we have generated Saccharomyces cerevisiae strains that permit the modulation of the expression levels of MHP1 (MAP-Homologous Protein 1) and of the alpha and beta-tubulin genes. Simultaneous overexpression of alpha and beta tubulin results in the accumulation of long aberrant microtubules in interphase, a similar phenotype as was observed in cells overexpressing MHP1. We demonstrate that overexpression of MHP1 in asynchronously growing yeast cultures leads to cell cycle arrest in G2. In cells that overexpress MHP1 and the tubulin genes, a suppression of both the MHP1 and the tubulin overexpression phenotypes can be observed. Progressive induction of alpha and beta tubulin overexpression and constitutive overexpression of MHP1 lead to the formation of long cytoplasmic microtubules more frequently than observed in cells overproducing tubulin or Mhplp individually and the increased microtubule polymerization could be correlated with the increase of a and beta tubulin expression. However, the overexpression of MHP1 did not alter the phenotypes of individual overexpression of a or beta-tubulin. These data indicate that Mhplp not only stabilizes microtubules but promotes microtubule assembly in vivo, and suggest that the role of other mammalian MAPs in the promotion of microtubule assembly could be tested in this yeast system.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0386-7196
pubmed:author
pubmed:issnType
Print
pubmed:volume
23
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
209-19
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Effect of microtubule-associated protein MHP1 on microtubule assembly and cell cycle progression in Saccharomyces cerevisiae.
pubmed:affiliation
Division of Oncology, University of Geneva, CMU, Switzerland. iirminger@cmu.unige.ch
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't