Linked Life Data

18957510

Source:http://linkedlifedata.com/resource/pubmed/id/18957510

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
Pt 22
pubmed:dateCreated
2008-11-6
pubmed:abstractText
In S. cerevisiae, spindle orientation is linked to the inheritance of the ;old' spindle pole by the bud. A player in this asymmetric commitment, Bud6p, promotes cortical capture of astral microtubules. Additionally, Bud6p stimulates actin cable formation though the formin Bni1p. A relationship with the second formin, Bnr1p, is unclear. Another player is Kar9p, a protein that guides microtubules along actin cables organised by formins. Here, we ask whether formins mediate Bud6p-dependent microtubule capture beyond any links to Kar9p and actin. We found that both formins control Bud6p localisation. bni1 mutations advanced recruitment of Bud6p at the bud neck, ahead of spindle assembly, whereas bnr1Delta reduced Bud6p association with the bud neck. Accordingly, bni1 or bnr1 mutations redirected microtubule capture to or away from the bud neck, respectively. Furthermore, a Bni1p truncation that can form actin cables independently of Bud6p could not bypass a bud6Delta for microtubule capture. Conversely, Bud6(1-565)p, a truncation insufficient for correct actin organisation via formins, supported microtubule capture. Finally, Bud6p or Bud6(1-565)p associated with microtubules in vitro. Thus, surprisingly, Bud6p may promote microtubule capture independently of its links to actin organisation, whereas formins would contribute to the program of Bud6p-dependent microtubule-cortex interactions by controlling Bud6p localisation.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0021-9533
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
121
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3803-14
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Dissecting the involvement of formins in Bud6p-mediated cortical capture of microtubules in S. cerevisiae.
pubmed:affiliation
Department of Genetics, University of Cambridge, Downing Street, Cambridge CB2 3EH, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't