Transglutaminase-catalyzed incorporation of polyamines masks the DNA-binding region of the transcription factor Relish

研究成果: ジャーナルへの寄稿記事

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抄録

In Drosophila, the final immune deficiency (IMD) pathwaydependent signal is transmitted through proteolytic conversion of the nuclear factor-B (NF-B)-like transcription factor Relish to the active N-Terminal fragment Relish-N. Relish-N is then translocated from the cytosol into the nucleus for the expression of IMD-controlled genes. We previously demonstrated that transglutaminase (TG) suppresses the IMD pathway by polymerizing Relish-N to inhibit its nuclear translocation. Conversely, we also demonstrated that orally ingested synthetic amines, such as monodansylcadaverine (DCA) and biotin-labeled pentylamine, are TG-dependently incorporated into Relish-N, causing the nuclear translocation of modified Relish-N in gut epithelial cells. It remains unclear, however, whether polyamine- containing Relish-N retains transcriptional activity. Here, we used mass spectrometry analysis of a recombinant Relish- N modified with DCA by TG activity after proteolytic digestion and show that the DCA-modified Gln residues are located in the DNA-binding region of Relish-N. TG-catalyzed DCA incorporation inhibited binding of Relish-N to the Rel-responsive element in the NF-B-binding DNA sequence. Subcellular fractionation of TG-expressing Drosophila S2 cells indicated that TG was localized in both the cytosol and nucleus. Of note, natural polyamines, including spermidine and spermine, competitively inhibited TG-dependentDCAincorporation into Relish- N. Moreover, in vivo experiments demonstrated that Relish- N was modified by spermine and that this modification reduced transcription of IMD pathway-controlled cecropin A1 and diptericin genes. These findings suggest that intracellular TG regulates Relish-N-mediated transcriptional activity by incorporating polyamines into Relish-N and via protein-protein cross-linking.

元の言語英語
ページ(範囲)6369-6380
ページ数12
ジャーナルJournal of Biological Chemistry
292
発行部数15
DOI
出版物ステータス出版済み - 4 14 2017

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Transglutaminases
Polyamines
Masks
Transcription Factors
DNA
Spermine
Cytosol
Drosophila
Cecropins
Genes
Spermidine
DNA sequences
Transcription
Fractionation
Biotin
Amines
Mass spectrometry
Digestion
Mass Spectrometry
Proteins

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology
  • Cell Biology

これを引用

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title = "Transglutaminase-catalyzed incorporation of polyamines masks the DNA-binding region of the transcription factor Relish",
abstract = "In Drosophila, the final immune deficiency (IMD) pathwaydependent signal is transmitted through proteolytic conversion of the nuclear factor-B (NF-B)-like transcription factor Relish to the active N-Terminal fragment Relish-N. Relish-N is then translocated from the cytosol into the nucleus for the expression of IMD-controlled genes. We previously demonstrated that transglutaminase (TG) suppresses the IMD pathway by polymerizing Relish-N to inhibit its nuclear translocation. Conversely, we also demonstrated that orally ingested synthetic amines, such as monodansylcadaverine (DCA) and biotin-labeled pentylamine, are TG-dependently incorporated into Relish-N, causing the nuclear translocation of modified Relish-N in gut epithelial cells. It remains unclear, however, whether polyamine- containing Relish-N retains transcriptional activity. Here, we used mass spectrometry analysis of a recombinant Relish- N modified with DCA by TG activity after proteolytic digestion and show that the DCA-modified Gln residues are located in the DNA-binding region of Relish-N. TG-catalyzed DCA incorporation inhibited binding of Relish-N to the Rel-responsive element in the NF-B-binding DNA sequence. Subcellular fractionation of TG-expressing Drosophila S2 cells indicated that TG was localized in both the cytosol and nucleus. Of note, natural polyamines, including spermidine and spermine, competitively inhibited TG-dependentDCAincorporation into Relish- N. Moreover, in vivo experiments demonstrated that Relish- N was modified by spermine and that this modification reduced transcription of IMD pathway-controlled cecropin A1 and diptericin genes. These findings suggest that intracellular TG regulates Relish-N-mediated transcriptional activity by incorporating polyamines into Relish-N and via protein-protein cross-linking.",
author = "Kouki Maki and Toshio Shibata and Shun-Ichiro Kawabata",
year = "2017",
month = "4",
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doi = "10.1074/jbc.M117.779579",
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T1 - Transglutaminase-catalyzed incorporation of polyamines masks the DNA-binding region of the transcription factor Relish

AU - Maki, Kouki

AU - Shibata, Toshio

AU - Kawabata, Shun-Ichiro

PY - 2017/4/14

Y1 - 2017/4/14

N2 - In Drosophila, the final immune deficiency (IMD) pathwaydependent signal is transmitted through proteolytic conversion of the nuclear factor-B (NF-B)-like transcription factor Relish to the active N-Terminal fragment Relish-N. Relish-N is then translocated from the cytosol into the nucleus for the expression of IMD-controlled genes. We previously demonstrated that transglutaminase (TG) suppresses the IMD pathway by polymerizing Relish-N to inhibit its nuclear translocation. Conversely, we also demonstrated that orally ingested synthetic amines, such as monodansylcadaverine (DCA) and biotin-labeled pentylamine, are TG-dependently incorporated into Relish-N, causing the nuclear translocation of modified Relish-N in gut epithelial cells. It remains unclear, however, whether polyamine- containing Relish-N retains transcriptional activity. Here, we used mass spectrometry analysis of a recombinant Relish- N modified with DCA by TG activity after proteolytic digestion and show that the DCA-modified Gln residues are located in the DNA-binding region of Relish-N. TG-catalyzed DCA incorporation inhibited binding of Relish-N to the Rel-responsive element in the NF-B-binding DNA sequence. Subcellular fractionation of TG-expressing Drosophila S2 cells indicated that TG was localized in both the cytosol and nucleus. Of note, natural polyamines, including spermidine and spermine, competitively inhibited TG-dependentDCAincorporation into Relish- N. Moreover, in vivo experiments demonstrated that Relish- N was modified by spermine and that this modification reduced transcription of IMD pathway-controlled cecropin A1 and diptericin genes. These findings suggest that intracellular TG regulates Relish-N-mediated transcriptional activity by incorporating polyamines into Relish-N and via protein-protein cross-linking.

AB - In Drosophila, the final immune deficiency (IMD) pathwaydependent signal is transmitted through proteolytic conversion of the nuclear factor-B (NF-B)-like transcription factor Relish to the active N-Terminal fragment Relish-N. Relish-N is then translocated from the cytosol into the nucleus for the expression of IMD-controlled genes. We previously demonstrated that transglutaminase (TG) suppresses the IMD pathway by polymerizing Relish-N to inhibit its nuclear translocation. Conversely, we also demonstrated that orally ingested synthetic amines, such as monodansylcadaverine (DCA) and biotin-labeled pentylamine, are TG-dependently incorporated into Relish-N, causing the nuclear translocation of modified Relish-N in gut epithelial cells. It remains unclear, however, whether polyamine- containing Relish-N retains transcriptional activity. Here, we used mass spectrometry analysis of a recombinant Relish- N modified with DCA by TG activity after proteolytic digestion and show that the DCA-modified Gln residues are located in the DNA-binding region of Relish-N. TG-catalyzed DCA incorporation inhibited binding of Relish-N to the Rel-responsive element in the NF-B-binding DNA sequence. Subcellular fractionation of TG-expressing Drosophila S2 cells indicated that TG was localized in both the cytosol and nucleus. Of note, natural polyamines, including spermidine and spermine, competitively inhibited TG-dependentDCAincorporation into Relish- N. Moreover, in vivo experiments demonstrated that Relish- N was modified by spermine and that this modification reduced transcription of IMD pathway-controlled cecropin A1 and diptericin genes. These findings suggest that intracellular TG regulates Relish-N-mediated transcriptional activity by incorporating polyamines into Relish-N and via protein-protein cross-linking.

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