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Phosphorylation Regulates FOXC2-Mediated Transcription in Lymphatic Endothelial Cells

Identifieur interne : 003300 ( Main/Exploration ); précédent : 003299; suivant : 003301

Phosphorylation Regulates FOXC2-Mediated Transcription in Lymphatic Endothelial Cells

Auteurs : Konstantin I. Ivanov ; Yan Agalarov ; Leena Valmu ; Olga Samuilova ; Johanna Liebl ; Nawal Houhou ; Hélène Maby-El Hajjami ; Camilla Norrmén ; Muriel Jaquet ; Naoyuki Miura ; Nadine Zangger ; Seppo Yl Herttuala ; Mauro Delorenzi ; Tatiana V. Petrova

Source :

RBID : PMC:3811871

Descripteurs français

English descriptors

Abstract

One of the key mechanisms linking cell signaling and control of gene expression is reversible phosphorylation of transcription factors. FOXC2 is a forkhead transcription factor that is mutated in the human vascular disease lymphedema-distichiasis and plays an essential role in lymphatic vascular development. However, the mechanisms regulating FOXC2 transcriptional activity are not well understood. We report here that FOXC2 is phosphorylated on eight evolutionarily conserved proline-directed serine/threonine residues. Loss of phosphorylation at these sites triggers substantial changes in the FOXC2 transcriptional program. Through genome-wide location analysis in lymphatic endothelial cells, we demonstrate that the changes are due to selective inhibition of FOXC2 recruitment to chromatin. The extent of the inhibition varied between individual binding sites, suggesting a novel rheostat-like mechanism by which expression of specific genes can be differentially regulated by FOXC2 phosphorylation. Furthermore, unlike the wild-type protein, the phosphorylation-deficient mutant of FOXC2 failed to induce vascular remodeling in vivo. Collectively, our results point to the pivotal role of phosphorylation in the regulation of FOXC2-mediated transcription in lymphatic endothelial cells and underscore the importance of FOXC2 phosphorylation in vascular development.


Url:
DOI: 10.1128/MCB.01387-12
PubMed: 23878394
PubMed Central: 3811871


Affiliations:


Links toward previous steps (curation, corpus...)


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<term>Amino Acid Sequence</term>
<term>Animals</term>
<term>Binding Sites (genetics)</term>
<term>COS Cells</term>
<term>Cells, Cultured</term>
<term>Cercopithecus aethiops</term>
<term>Endothelial Cells (metabolism)</term>
<term>Forkhead Transcription Factors (genetics)</term>
<term>Forkhead Transcription Factors (metabolism)</term>
<term>Gene Expression Regulation</term>
<term>HEK293 Cells</term>
<term>Hep G2 Cells</term>
<term>Humans</term>
<term>Immunoblotting</term>
<term>Mice</term>
<term>Mice, Transgenic</term>
<term>Microscopy, Confocal</term>
<term>Molecular Sequence Data</term>
<term>Mutation</term>
<term>Oligonucleotide Array Sequence Analysis</term>
<term>Phosphorylation</term>
<term>Proline (genetics)</term>
<term>Proline (metabolism)</term>
<term>Reverse Transcriptase Polymerase Chain Reaction</term>
<term>Serine (genetics)</term>
<term>Serine (metabolism)</term>
<term>Threonine (genetics)</term>
<term>Threonine (metabolism)</term>
<term>Transcription, Genetic (genetics)</term>
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<term>Animaux</term>
<term>Cellules COS</term>
<term>Cellules HEK293</term>
<term>Cellules HepG2</term>
<term>Cellules cultivées</term>
<term>Cellules endothéliales (métabolisme)</term>
<term>Cercopithecus aethiops</term>
<term>Données de séquences moléculaires</term>
<term>Facteurs de transcription Forkhead (génétique)</term>
<term>Facteurs de transcription Forkhead (métabolisme)</term>
<term>Humains</term>
<term>Immunotransfert</term>
<term>Microscopie confocale</term>
<term>Mutation</term>
<term>Phosphorylation</term>
<term>Proline (génétique)</term>
<term>Proline (métabolisme)</term>
<term>RT-PCR</term>
<term>Régulation de l'expression des gènes</term>
<term>Sites de fixation (génétique)</term>
<term>Souris</term>
<term>Souris transgéniques</term>
<term>Séquence d'acides aminés</term>
<term>Séquençage par oligonucléotides en batterie</term>
<term>Sérine (génétique)</term>
<term>Sérine (métabolisme)</term>
<term>Thréonine (génétique)</term>
<term>Thréonine (métabolisme)</term>
<term>Transcription génétique (génétique)</term>
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<term>Forkhead Transcription Factors</term>
<term>Proline</term>
<term>Serine</term>
<term>Threonine</term>
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<keywords scheme="MESH" qualifier="genetics" xml:lang="en">
<term>Binding Sites</term>
<term>Transcription, Genetic</term>
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<keywords scheme="MESH" qualifier="génétique" xml:lang="fr">
<term>Facteurs de transcription Forkhead</term>
<term>Proline</term>
<term>Sites de fixation</term>
<term>Sérine</term>
<term>Thréonine</term>
<term>Transcription génétique</term>
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<term>Forkhead Transcription Factors</term>
<term>Proline</term>
<term>Serine</term>
<term>Threonine</term>
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<term>Cellules endothéliales</term>
<term>Facteurs de transcription Forkhead</term>
<term>Proline</term>
<term>Sérine</term>
<term>Thréonine</term>
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<term>Amino Acid Sequence</term>
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<term>COS Cells</term>
<term>Cells, Cultured</term>
<term>Cercopithecus aethiops</term>
<term>Gene Expression Regulation</term>
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<term>Immunoblotting</term>
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<term>Microscopy, Confocal</term>
<term>Molecular Sequence Data</term>
<term>Mutation</term>
<term>Oligonucleotide Array Sequence Analysis</term>
<term>Phosphorylation</term>
<term>Reverse Transcriptase Polymerase Chain Reaction</term>
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<term>Cellules COS</term>
<term>Cellules HEK293</term>
<term>Cellules HepG2</term>
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<term>Données de séquences moléculaires</term>
<term>Humains</term>
<term>Immunotransfert</term>
<term>Microscopie confocale</term>
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<term>Séquence d'acides aminés</term>
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<front>
<div type="abstract" xml:lang="en">
<p>One of the key mechanisms linking cell signaling and control of gene expression is reversible phosphorylation of transcription factors. FOXC2 is a forkhead transcription factor that is mutated in the human vascular disease lymphedema-distichiasis and plays an essential role in lymphatic vascular development. However, the mechanisms regulating FOXC2 transcriptional activity are not well understood. We report here that FOXC2 is phosphorylated on eight evolutionarily conserved proline-directed serine/threonine residues. Loss of phosphorylation at these sites triggers substantial changes in the FOXC2 transcriptional program. Through genome-wide location analysis in lymphatic endothelial cells, we demonstrate that the changes are due to selective inhibition of FOXC2 recruitment to chromatin. The extent of the inhibition varied between individual binding sites, suggesting a novel rheostat-like mechanism by which expression of specific genes can be differentially regulated by FOXC2 phosphorylation. Furthermore, unlike the wild-type protein, the phosphorylation-deficient mutant of FOXC2 failed to induce vascular remodeling
<italic>in vivo</italic>
. Collectively, our results point to the pivotal role of phosphorylation in the regulation of FOXC2-mediated transcription in lymphatic endothelial cells and underscore the importance of FOXC2 phosphorylation in vascular development.</p>
</div>
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<name sortKey="Houhou, Nawal" sort="Houhou, Nawal" uniqKey="Houhou N" first="Nawal" last="Houhou">Nawal Houhou</name>
<name sortKey="Ivanov, Konstantin I" sort="Ivanov, Konstantin I" uniqKey="Ivanov K" first="Konstantin I." last="Ivanov">Konstantin I. Ivanov</name>
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<name sortKey="Liebl, Johanna" sort="Liebl, Johanna" uniqKey="Liebl J" first="Johanna" last="Liebl">Johanna Liebl</name>
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<name sortKey="Miura, Naoyuki" sort="Miura, Naoyuki" uniqKey="Miura N" first="Naoyuki" last="Miura">Naoyuki Miura</name>
<name sortKey="Norrmen, Camilla" sort="Norrmen, Camilla" uniqKey="Norrmen C" first="Camilla" last="Norrmén">Camilla Norrmén</name>
<name sortKey="Petrova, Tatiana V" sort="Petrova, Tatiana V" uniqKey="Petrova T" first="Tatiana V." last="Petrova">Tatiana V. Petrova</name>
<name sortKey="Samuilova, Olga" sort="Samuilova, Olga" uniqKey="Samuilova O" first="Olga" last="Samuilova">Olga Samuilova</name>
<name sortKey="Valmu, Leena" sort="Valmu, Leena" uniqKey="Valmu L" first="Leena" last="Valmu">Leena Valmu</name>
<name sortKey="Yl Herttuala, Seppo" sort="Yl Herttuala, Seppo" uniqKey="Yl Herttuala S" first="Seppo" last="Yl Herttuala">Seppo Yl Herttuala</name>
<name sortKey="Zangger, Nadine" sort="Zangger, Nadine" uniqKey="Zangger N" first="Nadine" last="Zangger">Nadine Zangger</name>
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