Serveur d'exploration sur la rapamycine et les champignons

Attention, ce site est en cours de développement !
Attention, site généré par des moyens informatiques à partir de corpus bruts.
Les informations ne sont donc pas validées.

Fission yeast Tor2 links nitrogen signals to cell proliferation and acts downstream of the Rheb GTPase.

Identifieur interne : 001786 ( Main/Exploration ); précédent : 001785; suivant : 001787

Fission yeast Tor2 links nitrogen signals to cell proliferation and acts downstream of the Rheb GTPase.

Auteurs : Masahiro Uritani [Japon] ; Hidetoshi Hidaka ; Yukari Hotta ; Masaru Ueno ; Takashi Ushimaru ; Takashi Toda

Source :

RBID : pubmed:17121544

Descripteurs français

English descriptors

Abstract

The target of rapamycin (Tor) plays a pivotal role in cell growth and metabolism. Yeast contains two related proteins, Tor1 and Tor2. In fission yeast, Tor1 is dispensable for normal growth but is involved in amino acid uptake and cell survival under various stress conditions. In contrast, Tor2 is essential for cell proliferation; however, its physiological function remains unknown. Here we characterize the roles of fission yeast Tor2 by creating temperature sensitive (tor2(ts)) mutants. Remarkably, we have found that tor2(ts) mimics nitrogen starvation responses, because the mutant displays a number of phenotypes that are normally induced only on nitrogen deprivation. These include G1 cell-cycle arrest with a small cell size, induction of autophagy and commitment to sexual differentiation. By contrast, tor1Deltator2(ts) double mutant cells show distinct phenotypes, as the cells cease division with normal cell size in the absence of G1 arrest. Tor2 physically interacts with the conserved Rhb1/GTPase. Intriguingly, over-expression of rhb1(+) or deletion of Rhb1-GAP-encoding tsc2(+) is capable of rescuing stress-sensitive phenotypes of the tor1 mutant, implying that Tor1 and Tor2 also share functions in cell survival under adverse environment. We propose that Tor1 and Tor2 are involved in both corroborative and independent roles in nutrient sensing and stress response pathways.

DOI: 10.1111/j.1365-2443.2006.01025.x
PubMed: 17121544


Affiliations:


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


Le document en format XML

<record>
<TEI>
<teiHeader>
<fileDesc>
<titleStmt>
<title xml:lang="en">Fission yeast Tor2 links nitrogen signals to cell proliferation and acts downstream of the Rheb GTPase.</title>
<author>
<name sortKey="Uritani, Masahiro" sort="Uritani, Masahiro" uniqKey="Uritani M" first="Masahiro" last="Uritani">Masahiro Uritani</name>
<affiliation wicri:level="1">
<nlm:affiliation>Department of Chemistry, Faculty of Science, Shizuoka University, 836 Oya Suruga-ku, Shizuoka 422-8529, Japan. scmurit@ipc.shizuoka.ac.jp</nlm:affiliation>
<country xml:lang="fr">Japon</country>
<wicri:regionArea>Department of Chemistry, Faculty of Science, Shizuoka University, 836 Oya Suruga-ku, Shizuoka 422-8529</wicri:regionArea>
<wicri:noRegion>Shizuoka 422-8529</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Hidaka, Hidetoshi" sort="Hidaka, Hidetoshi" uniqKey="Hidaka H" first="Hidetoshi" last="Hidaka">Hidetoshi Hidaka</name>
</author>
<author>
<name sortKey="Hotta, Yukari" sort="Hotta, Yukari" uniqKey="Hotta Y" first="Yukari" last="Hotta">Yukari Hotta</name>
</author>
<author>
<name sortKey="Ueno, Masaru" sort="Ueno, Masaru" uniqKey="Ueno M" first="Masaru" last="Ueno">Masaru Ueno</name>
</author>
<author>
<name sortKey="Ushimaru, Takashi" sort="Ushimaru, Takashi" uniqKey="Ushimaru T" first="Takashi" last="Ushimaru">Takashi Ushimaru</name>
</author>
<author>
<name sortKey="Toda, Takashi" sort="Toda, Takashi" uniqKey="Toda T" first="Takashi" last="Toda">Takashi Toda</name>
</author>
</titleStmt>
<publicationStmt>
<idno type="wicri:source">PubMed</idno>
<date when="2006">2006</date>
<idno type="RBID">pubmed:17121544</idno>
<idno type="pmid">17121544</idno>
<idno type="doi">10.1111/j.1365-2443.2006.01025.x</idno>
<idno type="wicri:Area/Main/Corpus">001743</idno>
<idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">001743</idno>
<idno type="wicri:Area/Main/Curation">001743</idno>
<idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">001743</idno>
<idno type="wicri:Area/Main/Exploration">001743</idno>
</publicationStmt>
<sourceDesc>
<biblStruct>
<analytic>
<title xml:lang="en">Fission yeast Tor2 links nitrogen signals to cell proliferation and acts downstream of the Rheb GTPase.</title>
<author>
<name sortKey="Uritani, Masahiro" sort="Uritani, Masahiro" uniqKey="Uritani M" first="Masahiro" last="Uritani">Masahiro Uritani</name>
<affiliation wicri:level="1">
<nlm:affiliation>Department of Chemistry, Faculty of Science, Shizuoka University, 836 Oya Suruga-ku, Shizuoka 422-8529, Japan. scmurit@ipc.shizuoka.ac.jp</nlm:affiliation>
<country xml:lang="fr">Japon</country>
<wicri:regionArea>Department of Chemistry, Faculty of Science, Shizuoka University, 836 Oya Suruga-ku, Shizuoka 422-8529</wicri:regionArea>
<wicri:noRegion>Shizuoka 422-8529</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Hidaka, Hidetoshi" sort="Hidaka, Hidetoshi" uniqKey="Hidaka H" first="Hidetoshi" last="Hidaka">Hidetoshi Hidaka</name>
</author>
<author>
<name sortKey="Hotta, Yukari" sort="Hotta, Yukari" uniqKey="Hotta Y" first="Yukari" last="Hotta">Yukari Hotta</name>
</author>
<author>
<name sortKey="Ueno, Masaru" sort="Ueno, Masaru" uniqKey="Ueno M" first="Masaru" last="Ueno">Masaru Ueno</name>
</author>
<author>
<name sortKey="Ushimaru, Takashi" sort="Ushimaru, Takashi" uniqKey="Ushimaru T" first="Takashi" last="Ushimaru">Takashi Ushimaru</name>
</author>
<author>
<name sortKey="Toda, Takashi" sort="Toda, Takashi" uniqKey="Toda T" first="Takashi" last="Toda">Takashi Toda</name>
</author>
</analytic>
<series>
<title level="j">Genes to cells : devoted to molecular & cellular mechanisms</title>
<idno type="ISSN">1356-9597</idno>
<imprint>
<date when="2006" type="published">2006</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc>
<textClass>
<keywords scheme="KwdEn" xml:lang="en">
<term>Amino Acid Sequence (MeSH)</term>
<term>Apoptosis (MeSH)</term>
<term>Cell Proliferation (MeSH)</term>
<term>GTP Phosphohydrolases (metabolism)</term>
<term>Genes, Fungal (MeSH)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Mutation (MeSH)</term>
<term>Nitrogen (metabolism)</term>
<term>Phosphatidylinositol 3-Kinases (genetics)</term>
<term>Phosphatidylinositol 3-Kinases (metabolism)</term>
<term>Protein Structure, Tertiary (MeSH)</term>
<term>Schizosaccharomyces (genetics)</term>
<term>Schizosaccharomyces (metabolism)</term>
<term>Schizosaccharomyces pombe Proteins (genetics)</term>
<term>Schizosaccharomyces pombe Proteins (metabolism)</term>
<term>Sequence Homology, Amino Acid (MeSH)</term>
<term>Temperature (MeSH)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Apoptose (MeSH)</term>
<term>Azote (métabolisme)</term>
<term>Données de séquences moléculaires (MeSH)</term>
<term>Gènes fongiques (MeSH)</term>
<term>Mutation (MeSH)</term>
<term>Phosphatidylinositol 3-kinases (génétique)</term>
<term>Phosphatidylinositol 3-kinases (métabolisme)</term>
<term>Prolifération cellulaire (MeSH)</term>
<term>Protéines de Schizosaccharomyces pombe (génétique)</term>
<term>Protéines de Schizosaccharomyces pombe (métabolisme)</term>
<term>Schizosaccharomyces (génétique)</term>
<term>Schizosaccharomyces (métabolisme)</term>
<term>Similitude de séquences d'acides aminés (MeSH)</term>
<term>Structure tertiaire des protéines (MeSH)</term>
<term>Séquence d'acides aminés (MeSH)</term>
<term>Température (MeSH)</term>
<term>dGTPases (métabolisme)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en">
<term>Phosphatidylinositol 3-Kinases</term>
<term>Schizosaccharomyces pombe Proteins</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en">
<term>GTP Phosphohydrolases</term>
<term>Nitrogen</term>
<term>Phosphatidylinositol 3-Kinases</term>
<term>Schizosaccharomyces pombe Proteins</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en">
<term>Schizosaccharomyces</term>
</keywords>
<keywords scheme="MESH" qualifier="génétique" xml:lang="fr">
<term>Phosphatidylinositol 3-kinases</term>
<term>Protéines de Schizosaccharomyces pombe</term>
<term>Schizosaccharomyces</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en">
<term>Schizosaccharomyces</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr">
<term>Azote</term>
<term>Phosphatidylinositol 3-kinases</term>
<term>Protéines de Schizosaccharomyces pombe</term>
<term>Schizosaccharomyces</term>
<term>dGTPases</term>
</keywords>
<keywords scheme="MESH" xml:lang="en">
<term>Amino Acid Sequence</term>
<term>Apoptosis</term>
<term>Cell Proliferation</term>
<term>Genes, Fungal</term>
<term>Molecular Sequence Data</term>
<term>Mutation</term>
<term>Protein Structure, Tertiary</term>
<term>Sequence Homology, Amino Acid</term>
<term>Temperature</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Apoptose</term>
<term>Données de séquences moléculaires</term>
<term>Gènes fongiques</term>
<term>Mutation</term>
<term>Prolifération cellulaire</term>
<term>Similitude de séquences d'acides aminés</term>
<term>Structure tertiaire des protéines</term>
<term>Séquence d'acides aminés</term>
<term>Température</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">The target of rapamycin (Tor) plays a pivotal role in cell growth and metabolism. Yeast contains two related proteins, Tor1 and Tor2. In fission yeast, Tor1 is dispensable for normal growth but is involved in amino acid uptake and cell survival under various stress conditions. In contrast, Tor2 is essential for cell proliferation; however, its physiological function remains unknown. Here we characterize the roles of fission yeast Tor2 by creating temperature sensitive (tor2(ts)) mutants. Remarkably, we have found that tor2(ts) mimics nitrogen starvation responses, because the mutant displays a number of phenotypes that are normally induced only on nitrogen deprivation. These include G1 cell-cycle arrest with a small cell size, induction of autophagy and commitment to sexual differentiation. By contrast, tor1Deltator2(ts) double mutant cells show distinct phenotypes, as the cells cease division with normal cell size in the absence of G1 arrest. Tor2 physically interacts with the conserved Rhb1/GTPase. Intriguingly, over-expression of rhb1(+) or deletion of Rhb1-GAP-encoding tsc2(+) is capable of rescuing stress-sensitive phenotypes of the tor1 mutant, implying that Tor1 and Tor2 also share functions in cell survival under adverse environment. We propose that Tor1 and Tor2 are involved in both corroborative and independent roles in nutrient sensing and stress response pathways.</div>
</front>
</TEI>
<pubmed>
<MedlineCitation Status="MEDLINE" Owner="NLM">
<PMID Version="1">17121544</PMID>
<DateCompleted>
<Year>2007</Year>
<Month>01</Month>
<Day>04</Day>
</DateCompleted>
<DateRevised>
<Year>2013</Year>
<Month>11</Month>
<Day>21</Day>
</DateRevised>
<Article PubModel="Print">
<Journal>
<ISSN IssnType="Print">1356-9597</ISSN>
<JournalIssue CitedMedium="Print">
<Volume>11</Volume>
<Issue>12</Issue>
<PubDate>
<Year>2006</Year>
<Month>Dec</Month>
</PubDate>
</JournalIssue>
<Title>Genes to cells : devoted to molecular & cellular mechanisms</Title>
<ISOAbbreviation>Genes Cells</ISOAbbreviation>
</Journal>
<ArticleTitle>Fission yeast Tor2 links nitrogen signals to cell proliferation and acts downstream of the Rheb GTPase.</ArticleTitle>
<Pagination>
<MedlinePgn>1367-79</MedlinePgn>
</Pagination>
<Abstract>
<AbstractText>The target of rapamycin (Tor) plays a pivotal role in cell growth and metabolism. Yeast contains two related proteins, Tor1 and Tor2. In fission yeast, Tor1 is dispensable for normal growth but is involved in amino acid uptake and cell survival under various stress conditions. In contrast, Tor2 is essential for cell proliferation; however, its physiological function remains unknown. Here we characterize the roles of fission yeast Tor2 by creating temperature sensitive (tor2(ts)) mutants. Remarkably, we have found that tor2(ts) mimics nitrogen starvation responses, because the mutant displays a number of phenotypes that are normally induced only on nitrogen deprivation. These include G1 cell-cycle arrest with a small cell size, induction of autophagy and commitment to sexual differentiation. By contrast, tor1Deltator2(ts) double mutant cells show distinct phenotypes, as the cells cease division with normal cell size in the absence of G1 arrest. Tor2 physically interacts with the conserved Rhb1/GTPase. Intriguingly, over-expression of rhb1(+) or deletion of Rhb1-GAP-encoding tsc2(+) is capable of rescuing stress-sensitive phenotypes of the tor1 mutant, implying that Tor1 and Tor2 also share functions in cell survival under adverse environment. We propose that Tor1 and Tor2 are involved in both corroborative and independent roles in nutrient sensing and stress response pathways.</AbstractText>
</Abstract>
<AuthorList CompleteYN="Y">
<Author ValidYN="Y">
<LastName>Uritani</LastName>
<ForeName>Masahiro</ForeName>
<Initials>M</Initials>
<AffiliationInfo>
<Affiliation>Department of Chemistry, Faculty of Science, Shizuoka University, 836 Oya Suruga-ku, Shizuoka 422-8529, Japan. scmurit@ipc.shizuoka.ac.jp</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Hidaka</LastName>
<ForeName>Hidetoshi</ForeName>
<Initials>H</Initials>
</Author>
<Author ValidYN="Y">
<LastName>Hotta</LastName>
<ForeName>Yukari</ForeName>
<Initials>Y</Initials>
</Author>
<Author ValidYN="Y">
<LastName>Ueno</LastName>
<ForeName>Masaru</ForeName>
<Initials>M</Initials>
</Author>
<Author ValidYN="Y">
<LastName>Ushimaru</LastName>
<ForeName>Takashi</ForeName>
<Initials>T</Initials>
</Author>
<Author ValidYN="Y">
<LastName>Toda</LastName>
<ForeName>Takashi</ForeName>
<Initials>T</Initials>
</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList>
<PublicationType UI="D016428">Journal Article</PublicationType>
<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
</PublicationTypeList>
</Article>
<MedlineJournalInfo>
<Country>England</Country>
<MedlineTA>Genes Cells</MedlineTA>
<NlmUniqueID>9607379</NlmUniqueID>
<ISSNLinking>1356-9597</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D029702">Schizosaccharomyces pombe Proteins</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>EC 2.7.1.-</RegistryNumber>
<NameOfSubstance UI="D019869">Phosphatidylinositol 3-Kinases</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>EC 2.7.1.137</RegistryNumber>
<NameOfSubstance UI="C513100">tor2 protein, S pombe</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>EC 3.6.1.-</RegistryNumber>
<NameOfSubstance UI="D020558">GTP Phosphohydrolases</NameOfSubstance>
</Chemical>
<Chemical>
<RegistryNumber>N762921K75</RegistryNumber>
<NameOfSubstance UI="D009584">Nitrogen</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D000595" MajorTopicYN="N">Amino Acid Sequence</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D017209" MajorTopicYN="N">Apoptosis</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D049109" MajorTopicYN="Y">Cell Proliferation</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D020558" MajorTopicYN="N">GTP Phosphohydrolases</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D005800" MajorTopicYN="N">Genes, Fungal</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D008969" MajorTopicYN="N">Molecular Sequence Data</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D009154" MajorTopicYN="N">Mutation</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D009584" MajorTopicYN="N">Nitrogen</DescriptorName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D019869" MajorTopicYN="N">Phosphatidylinositol 3-Kinases</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D017434" MajorTopicYN="N">Protein Structure, Tertiary</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D012568" MajorTopicYN="N">Schizosaccharomyces</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D029702" MajorTopicYN="N">Schizosaccharomyces pombe Proteins</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D017386" MajorTopicYN="N">Sequence Homology, Amino Acid</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D013696" MajorTopicYN="N">Temperature</DescriptorName>
</MeshHeading>
</MeshHeadingList>
</MedlineCitation>
<PubmedData>
<History>
<PubMedPubDate PubStatus="pubmed">
<Year>2006</Year>
<Month>11</Month>
<Day>24</Day>
<Hour>9</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="medline">
<Year>2007</Year>
<Month>1</Month>
<Day>5</Day>
<Hour>9</Hour>
<Minute>0</Minute>
</PubMedPubDate>
<PubMedPubDate PubStatus="entrez">
<Year>2006</Year>
<Month>11</Month>
<Day>24</Day>
<Hour>9</Hour>
<Minute>0</Minute>
</PubMedPubDate>
</History>
<PublicationStatus>ppublish</PublicationStatus>
<ArticleIdList>
<ArticleId IdType="pubmed">17121544</ArticleId>
<ArticleId IdType="pii">GTC1025</ArticleId>
<ArticleId IdType="doi">10.1111/j.1365-2443.2006.01025.x</ArticleId>
</ArticleIdList>
</PubmedData>
</pubmed>
<affiliations>
<list>
<country>
<li>Japon</li>
</country>
</list>
<tree>
<noCountry>
<name sortKey="Hidaka, Hidetoshi" sort="Hidaka, Hidetoshi" uniqKey="Hidaka H" first="Hidetoshi" last="Hidaka">Hidetoshi Hidaka</name>
<name sortKey="Hotta, Yukari" sort="Hotta, Yukari" uniqKey="Hotta Y" first="Yukari" last="Hotta">Yukari Hotta</name>
<name sortKey="Toda, Takashi" sort="Toda, Takashi" uniqKey="Toda T" first="Takashi" last="Toda">Takashi Toda</name>
<name sortKey="Ueno, Masaru" sort="Ueno, Masaru" uniqKey="Ueno M" first="Masaru" last="Ueno">Masaru Ueno</name>
<name sortKey="Ushimaru, Takashi" sort="Ushimaru, Takashi" uniqKey="Ushimaru T" first="Takashi" last="Ushimaru">Takashi Ushimaru</name>
</noCountry>
<country name="Japon">
<noRegion>
<name sortKey="Uritani, Masahiro" sort="Uritani, Masahiro" uniqKey="Uritani M" first="Masahiro" last="Uritani">Masahiro Uritani</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Bois/explor/RapamycinFungusV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001786 | SxmlIndent | more

Ou

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001786 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Bois
   |area=    RapamycinFungusV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     pubmed:17121544
   |texte=   Fission yeast Tor2 links nitrogen signals to cell proliferation and acts downstream of the Rheb GTPase.
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:17121544" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a RapamycinFungusV1 

Wicri

This area was generated with Dilib version V0.6.38.
Data generation: Thu Nov 19 21:55:41 2020. Site generation: Thu Nov 19 22:00:39 2020