Words similar to dbf
Example sentences for: dbf
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Identified components of the MEN include Tem1 (a GTP-binding protein), Lte1 (a putative guanine nucleotide releasing factor), Nud1 (a spindle-pole-body protein), Cdc15 (a protein kinase), Dbf2/Mob1 (a protein kinase complex), Cdc5 (a Polo-like protein kinase), and Cdc14 (a protein phosphatase).
First, the sole essential function of the Tem1, Cdc15, Dbf2/Dbf20, and Mob1 (but not Cdc5) proteins are to promote the release of Cdc14 from the nucleolus, as cells lacking these proteins can grow upon simultaneous reduction of NET1 activity.
To evaluate whether the net1(7m) and net1(19m') phosphosite mutants have an impact on FEAR, we analyzed Cdc14 localization in synchronous populations of dbf2-1 , net1(7m) dbf2-1, and net1(19m') dbf2-1 cells following release from an α-factor block in G1 phase at 25°C to α-factor-free medium prewarmed to 37°C (nonpermissive temperature for dbf2-1 ). As shown in Figure 6D, the percentage of cells that completely released Cdc14 during early anaphase (spindle length 0-8 μm) was reduced by ~50% in net1(7m) and ~25% in net1(19m') cells compared with wild-type cells.
In S. cerevisiae , disassembly of the RENT complex and the subsequent release of Cdc14 from the nucleolus drive cells to exit mitosis [ 8 9 ] . This event is thought to require two independent signals: an unknown mitosis-specific signal and a signal from the mitotic exit network (MEN) proteins including Tem1, Cdc15, and Dbf2 [ 8 9 ] . The Polo-like kinase Cdc5 also belongs to the MEN, thus we tested whether it too is required for release of Cdc14 from the nucleolus by using indirect immunofluorescence to compare Cdc14 localization patterns in wild type and cdc5-1 cells.
Cdc15, Dbf2, and Mob1 are not properly localized to the spindle pole body in a significant fraction of cdc5-1 cells [ 30 31 17 ] , and Dbf2/Mob1 protein kinase activity is diminished in cdc5 cells [ 15 16 17 ] , suggesting that at least one function of Cdc5 is to generate maximally active Dbf2/Mob1, which can then trigger Cdc14 release.
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