Activation of the transcription of Gal4-regulated genes by Physarum 14-3-3 in yeast is related to dimer-binding motif-2 and three phosphorylation sites

The roles of 14-3-3 proteins in the lower eukaryotes are still elusive. We isolated a cDNA encoding the 14-3-3 protein (P14-3-3) from the lower eukaryote Physarum polycephalum. This P14-3-3 gene was then inserted downstream of the Gal4 DNA-binding domain in the yeast expression vector pGBKT7. The re...

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Veröffentlicht in:Archives of microbiology 2010, Vol.192 (1), p.33-40
Hauptverfasser: Liu, Shide, Li, Minghua, Zhang, Jianhua, Kang, Kang, Tian, Shengli, Wang, Yisi, Xing, Miao
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creator Liu, Shide
Li, Minghua
Zhang, Jianhua
Kang, Kang
Tian, Shengli
Wang, Yisi
Xing, Miao
description The roles of 14-3-3 proteins in the lower eukaryotes are still elusive. We isolated a cDNA encoding the 14-3-3 protein (P14-3-3) from the lower eukaryote Physarum polycephalum. This P14-3-3 gene was then inserted downstream of the Gal4 DNA-binding domain in the yeast expression vector pGBKT7. The recombinant vector was transformed into auxotrophic AH109 and Y187 yeast cells to detect the activation of Gal4-regulated gene expression mediated by P14-3-3. The results showed that three reporter genes (ADE2, HIS3, and lacZ) could be normally expressed, indicating that the transcriptional activation function of P14-3-3 was retained. We subsequently used a truncated P14-3-3 peptides and mutant peptides to study the activation of the Gal4-regulated genes ADE2, HIS3, and lacZ. We found that deletion of the N-terminal second dimer-binding motif (DBM2) sequence or the C-terminal coil sequence led to the loss of P14-3-3's transcriptional activation function. Specifically, any mutation at the potential phosphorylation sites (Ser62 and Ser67) on DBM2 or at the C-terminal potential phosphorylation site (235ThrSer236) led to the loss of the transcriptional activation function of P14-3-3. Taken together, these observations suggest that the transcriptional activation function of P14-3-3 in lower eukaryotes is related to DBM2 and the C-terminal coil structures.
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We isolated a cDNA encoding the 14-3-3 protein (P14-3-3) from the lower eukaryote Physarum polycephalum. This P14-3-3 gene was then inserted downstream of the Gal4 DNA-binding domain in the yeast expression vector pGBKT7. The recombinant vector was transformed into auxotrophic AH109 and Y187 yeast cells to detect the activation of Gal4-regulated gene expression mediated by P14-3-3. The results showed that three reporter genes (ADE2, HIS3, and lacZ) could be normally expressed, indicating that the transcriptional activation function of P14-3-3 was retained. We subsequently used a truncated P14-3-3 peptides and mutant peptides to study the activation of the Gal4-regulated genes ADE2, HIS3, and lacZ. We found that deletion of the N-terminal second dimer-binding motif (DBM2) sequence or the C-terminal coil sequence led to the loss of P14-3-3's transcriptional activation function. Specifically, any mutation at the potential phosphorylation sites (Ser62 and Ser67) on DBM2 or at the C-terminal potential phosphorylation site (235ThrSer236) led to the loss of the transcriptional activation function of P14-3-3. 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Molecular biology ; Kinases ; Life Sciences ; Microbial Ecology ; Microbiology ; Molecular Sequence Data ; Mutation ; Mycology ; Nuclear Proteins - genetics ; Nuclear Proteins - metabolism ; Original Paper ; Peptides ; Phosphorylation ; Physarum polycephalum - genetics ; Physarum polycephalum - metabolism ; Plasmids ; Promoter Regions, Genetic ; Protein Structure, Tertiary - genetics ; Proteins ; Protozoan Proteins - chemistry ; Protozoan Proteins - genetics ; Protozoan Proteins - metabolism ; Recombinant Fusion Proteins - genetics ; Recombinant Fusion Proteins - metabolism ; Repressor Proteins - genetics ; Repressor Proteins - metabolism ; Sequence Deletion ; Signal transduction ; Transcription Factors - metabolism ; Transcriptional Activation ; Yeast ; Yeasts ; Yeasts - genetics ; Yeasts - metabolism</subject><ispartof>Archives of microbiology, 2010, Vol.192 (1), p.33-40</ispartof><rights>Springer-Verlag 2009</rights><rights>2015 INIST-CNRS</rights><rights>Springer-Verlag 2010</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c424t-6ef3d40f320468ef031804ce44972a8d9cc9dc94ff6b9742ac0877b5f3338e2b3</citedby><cites>FETCH-LOGICAL-c424t-6ef3d40f320468ef031804ce44972a8d9cc9dc94ff6b9742ac0877b5f3338e2b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s00203-009-0526-3$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s00203-009-0526-3$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,4009,27902,27903,27904,41467,42536,51297</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=22382500$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19936707$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Liu, Shide</creatorcontrib><creatorcontrib>Li, Minghua</creatorcontrib><creatorcontrib>Zhang, Jianhua</creatorcontrib><creatorcontrib>Kang, Kang</creatorcontrib><creatorcontrib>Tian, Shengli</creatorcontrib><creatorcontrib>Wang, Yisi</creatorcontrib><creatorcontrib>Xing, Miao</creatorcontrib><title>Activation of the transcription of Gal4-regulated genes by Physarum 14-3-3 in yeast is related to dimer-binding motif-2 and three phosphorylation sites</title><title>Archives of microbiology</title><addtitle>Arch Microbiol</addtitle><addtitle>Arch Microbiol</addtitle><description>The roles of 14-3-3 proteins in the lower eukaryotes are still elusive. We isolated a cDNA encoding the 14-3-3 protein (P14-3-3) from the lower eukaryote Physarum polycephalum. This P14-3-3 gene was then inserted downstream of the Gal4 DNA-binding domain in the yeast expression vector pGBKT7. The recombinant vector was transformed into auxotrophic AH109 and Y187 yeast cells to detect the activation of Gal4-regulated gene expression mediated by P14-3-3. The results showed that three reporter genes (ADE2, HIS3, and lacZ) could be normally expressed, indicating that the transcriptional activation function of P14-3-3 was retained. We subsequently used a truncated P14-3-3 peptides and mutant peptides to study the activation of the Gal4-regulated genes ADE2, HIS3, and lacZ. We found that deletion of the N-terminal second dimer-binding motif (DBM2) sequence or the C-terminal coil sequence led to the loss of P14-3-3's transcriptional activation function. Specifically, any mutation at the potential phosphorylation sites (Ser62 and Ser67) on DBM2 or at the C-terminal potential phosphorylation site (235ThrSer236) led to the loss of the transcriptional activation function of P14-3-3. 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Specifically, any mutation at the potential phosphorylation sites (Ser62 and Ser67) on DBM2 or at the C-terminal potential phosphorylation site (235ThrSer236) led to the loss of the transcriptional activation function of P14-3-3. Taken together, these observations suggest that the transcriptional activation function of P14-3-3 in lower eukaryotes is related to DBM2 and the C-terminal coil structures.</abstract><cop>Berlin/Heidelberg</cop><pub>Berlin/Heidelberg : Springer-Verlag</pub><pmid>19936707</pmid><doi>10.1007/s00203-009-0526-3</doi><tpages>8</tpages></addata></record>
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subjects 14-3-3 Proteins - chemistry
14-3-3 Proteins - genetics
14-3-3 Proteins - metabolism
Amino Acid Motifs - genetics
Amino Acid Sequence
Apoptosis
Base Sequence
Binding Sites - genetics
Biochemistry
Biological and medical sciences
Biomedical and Life Sciences
Biotechnology
Cell Biology
Cell cycle
Cloning
DNA, Fungal - genetics
DNA, Fungal - metabolism
Ecology
Eukaryotes
Fundamental and applied biological sciences. Psychology
Gene Expression Regulation, Fungal
Genes
Genetic engineering
Growth, nutrition, metabolism, transports, enzymes. Molecular biology
Kinases
Life Sciences
Microbial Ecology
Microbiology
Molecular Sequence Data
Mutation
Mycology
Nuclear Proteins - genetics
Nuclear Proteins - metabolism
Original Paper
Peptides
Phosphorylation
Physarum polycephalum - genetics
Physarum polycephalum - metabolism
Plasmids
Promoter Regions, Genetic
Protein Structure, Tertiary - genetics
Proteins
Protozoan Proteins - chemistry
Protozoan Proteins - genetics
Protozoan Proteins - metabolism
Recombinant Fusion Proteins - genetics
Recombinant Fusion Proteins - metabolism
Repressor Proteins - genetics
Repressor Proteins - metabolism
Sequence Deletion
Signal transduction
Transcription Factors - metabolism
Transcriptional Activation
Yeast
Yeasts
Yeasts - genetics
Yeasts - metabolism
title Activation of the transcription of Gal4-regulated genes by Physarum 14-3-3 in yeast is related to dimer-binding motif-2 and three phosphorylation sites
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