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Impairment of theNeurospora crassaCOT-1 kinase results in defects in hyphal polarity. Some of these effects are partially suppressed by inactivation of gul-1 (encoding an mRNA-binding protein involved in translational regulation). Here, we report on the transcriptional profiling of cot-1 inactivation and demonstrate that gul-1 affects transcript abundance of multiple genes in the COT-1 pathway, including processes such as cell wall remodeling, nitrogen, and amino acid metabolism. The GUL-1 protein itself was found to be distributed within the entire hyphal cell, along with a clear presence of aggregates that traffic within the cytoplasm. Live imaging of GUL-1-GFP demonstrated that GUL-1 transport is microtubule-dependent. Cellular stress, as imposed by the presence of the cell wall biosynthesis inhibitor Nikkomycin Z or by nitrogen limitation, resulted in a 2-3-fold increase of GUL-1 aggregate association with nuclei. Taken together, this study demonstrates that GUL-1 affects multiple processes, its function is stress-related and linked with cellular traffic and nuclear association.
This article was published in the following journal.
Name: Fungal genetics and biology : FG & B
In fungal hyphae multiple protein complexes assemble at sites of apical growth to maintain cell polarity. The polarisome, which in Saccharomyces cerevisiae consists of Spa2, Pea2, Bud6 and Bni1 is des...
Calcineurin responsive zinc-finger-1 binds to a unique promoter sequence to upregulate neuronal calcium sensor-1, whose interaction with MID-1 increases tolerance to calcium stress in Neurospora crassa.
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study for discovering new criteria for localization of site of acessory pathway from surface ECG
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A species of ascomycetous fungi of the family Sordariaceae, order SORDARIALES, much used in biochemical, genetic, and physiologic studies.
A minichromosome maintenance protein that is a key component of the six member MCM protein complex. It contains a NUCLEAR LOCALIZATION SIGNAL which may provide targeting of the protein complex and an extended N-terminus which is rich in SERINE residues.
A zinc finger transcription factor that contains five CYS2-HIS2 ZINC FINGERS and binds to the GLI consensus sequence 5'-GGGTGGTC-3'. The full-length protein functions as a transcriptional activator whereas the truncated C-terminal form functions as a transcriptional repressor of the Sonic Hedgehog (Shh) signaling pathway; a balance between these two forms is critical for limb and digit development. GLI3 also plays a critical role in the differentiation and proliferation of CHONDROCYTES.
A minichromosome maintenance protein that is a key component of the six member MCM protein complex. It contains a NUCLEAR LOCALIZATION SIGNAL, which provide targeting of the protein complex. In addition, acetylation of this protein may play a role in regulating of DNA replication and cell cycle progression.
A basic-helix-loop-helix transcription factor that functions as a transcriptional repressor for genes transcribed by bHLH proteins. For example, it may negatively regulate MYOGENESIS by inhibiting MyoD1 and ASH1 proteins. It is also required for the stability of FANCONI ANEMIA COMPLEMENTATION GROUP PROTEINS and their localization to the cell nucleus in response to DNA DAMAGE.
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