ER remodeling by the large GTPase atlastin promotes vacuolar growth of Legionella pneumophila

The pathogenic bacterium Legionella pneumophila replicates in host cells within a distinct ER‐associated compartment termed the Legionella ‐containing vacuole (LCV). How the dynamic ER network contributes to pathogen proliferation within the nascent LCV remains elusive. A proteomic analysis of purif...

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Veröffentlicht in:EMBO reports 2017-10, Vol.18 (10), p.1817-1836
Hauptverfasser: Steiner, Bernhard, Swart, Anna Leoni, Welin, Amanda, Weber, Stephen, Personnic, Nicolas, Kaech, Andres, Freyre, Christophe, Ziegler, Urs, Klemm, Robin W, Hilbi, Hubert
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container_end_page 1836
container_issue 10
container_start_page 1817
container_title EMBO reports
container_volume 18
creator Steiner, Bernhard
Swart, Anna Leoni
Welin, Amanda
Weber, Stephen
Personnic, Nicolas
Kaech, Andres
Freyre, Christophe
Ziegler, Urs
Klemm, Robin W
Hilbi, Hubert
description The pathogenic bacterium Legionella pneumophila replicates in host cells within a distinct ER‐associated compartment termed the Legionella ‐containing vacuole (LCV). How the dynamic ER network contributes to pathogen proliferation within the nascent LCV remains elusive. A proteomic analysis of purified LCVs identified the ER tubule‐resident large GTPase atlastin3 (Atl3, yeast Sey1p) and the reticulon protein Rtn4 as conserved LCV host components. Here, we report that Sey1/Atl3 and Rtn4 localize to early LCVs and are critical for pathogen vacuole formation. Sey1 overproduction promotes intracellular growth of L. pneumophila , whereas a catalytically inactive, dominant‐negative GTPase mutant protein, or Atl3 depletion, restricts pathogen replication and impairs LCV maturation. Sey1 is not required for initial recruitment of ER to PtdIns(4) P ‐positive LCVs but for subsequent pathogen vacuole expansion. GTP (but not GDP) catalyzes the Sey1‐dependent aggregation of purified, ER‐positive LCVs in vitro . Thus, Sey1/Atl3‐dependent ER remodeling contributes to LCV maturation and intracellular replication of L. pneumophila . Synopsis The intracellular pathogen Legionella pneumophila replicates within a distinct ER‐associated compartment, the Legionella ‐containing vacuole (LCV). The large, dynamin‐like GTPase atlastin3/Sey1 contributes to LCV maturation and growth by promoting ER tubule dynamics and organelle remodeling. The ER tubule‐resident large GTPase Atlastin3/Sey1 localizes to LCVs and enhances intracellular replication of L. pneumophila . Sey1 is dispensable for initial recruitment of ER to PtdIns(4) P ‐positive LCVs but promotes subsequent pathogen vacuole expansion. GTP (but not GDP) triggers the Sey1‐dependent aggregation of purified, ER‐positive LCVs in vitro . Graphical Abstract The intracellular pathogen Legionella pneumophila replicates within a distinct ER‐associated compartment, the Legionella ‐containing vacuole (LCV). The large, dynamin‐like GTPase atlastin3/Sey1 contributes to LCV maturation and growth by promoting ER tubule dynamics and organelle remodeling.
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How the dynamic ER network contributes to pathogen proliferation within the nascent LCV remains elusive. A proteomic analysis of purified LCVs identified the ER tubule‐resident large GTPase atlastin3 (Atl3, yeast Sey1p) and the reticulon protein Rtn4 as conserved LCV host components. Here, we report that Sey1/Atl3 and Rtn4 localize to early LCVs and are critical for pathogen vacuole formation. Sey1 overproduction promotes intracellular growth of L. pneumophila , whereas a catalytically inactive, dominant‐negative GTPase mutant protein, or Atl3 depletion, restricts pathogen replication and impairs LCV maturation. Sey1 is not required for initial recruitment of ER to PtdIns(4) P ‐positive LCVs but for subsequent pathogen vacuole expansion. GTP (but not GDP) catalyzes the Sey1‐dependent aggregation of purified, ER‐positive LCVs in vitro . Thus, Sey1/Atl3‐dependent ER remodeling contributes to LCV maturation and intracellular replication of L. pneumophila . Synopsis The intracellular pathogen Legionella pneumophila replicates within a distinct ER‐associated compartment, the Legionella ‐containing vacuole (LCV). The large, dynamin‐like GTPase atlastin3/Sey1 contributes to LCV maturation and growth by promoting ER tubule dynamics and organelle remodeling. The ER tubule‐resident large GTPase Atlastin3/Sey1 localizes to LCVs and enhances intracellular replication of L. pneumophila . Sey1 is dispensable for initial recruitment of ER to PtdIns(4) P ‐positive LCVs but promotes subsequent pathogen vacuole expansion. GTP (but not GDP) triggers the Sey1‐dependent aggregation of purified, ER‐positive LCVs in vitro . Graphical Abstract The intracellular pathogen Legionella pneumophila replicates within a distinct ER‐associated compartment, the Legionella ‐containing vacuole (LCV). 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How the dynamic ER network contributes to pathogen proliferation within the nascent LCV remains elusive. A proteomic analysis of purified LCVs identified the ER tubule‐resident large GTPase atlastin3 (Atl3, yeast Sey1p) and the reticulon protein Rtn4 as conserved LCV host components. Here, we report that Sey1/Atl3 and Rtn4 localize to early LCVs and are critical for pathogen vacuole formation. Sey1 overproduction promotes intracellular growth of L. pneumophila , whereas a catalytically inactive, dominant‐negative GTPase mutant protein, or Atl3 depletion, restricts pathogen replication and impairs LCV maturation. Sey1 is not required for initial recruitment of ER to PtdIns(4) P ‐positive LCVs but for subsequent pathogen vacuole expansion. GTP (but not GDP) catalyzes the Sey1‐dependent aggregation of purified, ER‐positive LCVs in vitro . Thus, Sey1/Atl3‐dependent ER remodeling contributes to LCV maturation and intracellular replication of L. pneumophila . Synopsis The intracellular pathogen Legionella pneumophila replicates within a distinct ER‐associated compartment, the Legionella ‐containing vacuole (LCV). The large, dynamin‐like GTPase atlastin3/Sey1 contributes to LCV maturation and growth by promoting ER tubule dynamics and organelle remodeling. The ER tubule‐resident large GTPase Atlastin3/Sey1 localizes to LCVs and enhances intracellular replication of L. pneumophila . Sey1 is dispensable for initial recruitment of ER to PtdIns(4) P ‐positive LCVs but promotes subsequent pathogen vacuole expansion. GTP (but not GDP) triggers the Sey1‐dependent aggregation of purified, ER‐positive LCVs in vitro . Graphical Abstract The intracellular pathogen Legionella pneumophila replicates within a distinct ER‐associated compartment, the Legionella ‐containing vacuole (LCV). The large, dynamin‐like GTPase atlastin3/Sey1 contributes to LCV maturation and growth by promoting ER tubule dynamics and organelle remodeling.</description><subject>A549 Cells</subject><subject>Agglomeration</subject><subject>Dictyostelium - microbiology</subject><subject>Dictyostelium discoideum</subject><subject>Dynamin</subject><subject>EMBO20</subject><subject>EMBO23</subject><subject>Endoplasmic reticulum</subject><subject>Endoplasmic Reticulum - microbiology</subject><subject>Endoplasmic Reticulum - physiology</subject><subject>GTP-Binding Proteins - genetics</subject><subject>GTP-Binding Proteins - metabolism</subject><subject>Guanosine triphosphatases</subject><subject>Guanosine triphosphate</subject><subject>Humans</subject><subject>Intracellular</subject><subject>Legionella</subject><subject>Legionella pneumophila - growth &amp; development</subject><subject>Legionella pneumophila - pathogenicity</subject><subject>Legionnaires' disease bacterium</subject><subject>macrophage</subject><subject>Macrophages - microbiology</subject><subject>Maturation</subject><subject>Membrane Proteins - genetics</subject><subject>Membrane Proteins - metabolism</subject><subject>Nogo Proteins - genetics</subject><subject>Nogo Proteins - metabolism</subject><subject>pathogen vacuole</subject><subject>Pathogens</subject><subject>phosphoinositide lipid</subject><subject>Proteomics</subject><subject>Recruitment</subject><subject>Replication</subject><subject>type IV secretion</subject><subject>Type IV Secretion Systems</subject><subject>Vacuoles - metabolism</subject><subject>Vacuoles - microbiology</subject><subject>Yeast</subject><subject>Yeasts</subject><issn>1469-221X</issn><issn>1469-3178</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkc9rFDEcxQdRbK2evUnAi5dt83sSD4KWbSusKKWCFwmZme_MTskkYzLTsv-9qbsuqyCeEsjnvbzHK4qXBJ8SQQU9g6GKpxSTkjON2aPimHCpF4yU6vHuTin5dlQ8S-kWYyx0qZ4WR1QpJgSXx8X35TWKMIQGXO87VG3QtAbkbOwAXd58sQmQnZxNU-_RGMMQJkjoztZzyAzqYrif1ii0aAVdHzw4Z9HoYR7CuO6dfV48aa1L8GJ3nhRfL5Y351eL1efLj-fvV4taEMYWDFiDpeRcVkBbxWhJdGulFrKGRkkp21aCrjg0llKJK66JrltVNbxWvFSEnRTvtr7jXA3Q1OCnaJ0ZYz_YuDHB9ubPF9-vTRfujJCU5Q-ywZudQQw_ZkiTGfpUP9TxEOZkiGaUSC6xyujrv9DbMEef62WKC8wYwzxTZ1uqjiGlCO0-DMHm13TmYTqzny4rXh122PO_t8rA2y1w3zvY_M_PLD99uD50x1txyjrfQTxI_Y9APwHOZrbg</recordid><startdate>201710</startdate><enddate>201710</enddate><creator>Steiner, Bernhard</creator><creator>Swart, Anna Leoni</creator><creator>Welin, Amanda</creator><creator>Weber, Stephen</creator><creator>Personnic, Nicolas</creator><creator>Kaech, Andres</creator><creator>Freyre, Christophe</creator><creator>Ziegler, Urs</creator><creator>Klemm, Robin W</creator><creator>Hilbi, Hubert</creator><general>Nature Publishing Group UK</general><general>Blackwell Publishing Ltd</general><general>John Wiley and Sons Inc</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QL</scope><scope>7T5</scope><scope>7TM</scope><scope>7TO</scope><scope>7U9</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>H94</scope><scope>K9.</scope><scope>M7N</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0001-8460-5952</orcidid><orcidid>https://orcid.org/0000-0002-5462-9301</orcidid></search><sort><creationdate>201710</creationdate><title>ER remodeling by the large GTPase atlastin promotes vacuolar growth of Legionella pneumophila</title><author>Steiner, Bernhard ; 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How the dynamic ER network contributes to pathogen proliferation within the nascent LCV remains elusive. A proteomic analysis of purified LCVs identified the ER tubule‐resident large GTPase atlastin3 (Atl3, yeast Sey1p) and the reticulon protein Rtn4 as conserved LCV host components. Here, we report that Sey1/Atl3 and Rtn4 localize to early LCVs and are critical for pathogen vacuole formation. Sey1 overproduction promotes intracellular growth of L. pneumophila , whereas a catalytically inactive, dominant‐negative GTPase mutant protein, or Atl3 depletion, restricts pathogen replication and impairs LCV maturation. Sey1 is not required for initial recruitment of ER to PtdIns(4) P ‐positive LCVs but for subsequent pathogen vacuole expansion. GTP (but not GDP) catalyzes the Sey1‐dependent aggregation of purified, ER‐positive LCVs in vitro . Thus, Sey1/Atl3‐dependent ER remodeling contributes to LCV maturation and intracellular replication of L. pneumophila . Synopsis The intracellular pathogen Legionella pneumophila replicates within a distinct ER‐associated compartment, the Legionella ‐containing vacuole (LCV). The large, dynamin‐like GTPase atlastin3/Sey1 contributes to LCV maturation and growth by promoting ER tubule dynamics and organelle remodeling. The ER tubule‐resident large GTPase Atlastin3/Sey1 localizes to LCVs and enhances intracellular replication of L. pneumophila . Sey1 is dispensable for initial recruitment of ER to PtdIns(4) P ‐positive LCVs but promotes subsequent pathogen vacuole expansion. GTP (but not GDP) triggers the Sey1‐dependent aggregation of purified, ER‐positive LCVs in vitro . Graphical Abstract The intracellular pathogen Legionella pneumophila replicates within a distinct ER‐associated compartment, the Legionella ‐containing vacuole (LCV). The large, dynamin‐like GTPase atlastin3/Sey1 contributes to LCV maturation and growth by promoting ER tubule dynamics and organelle remodeling.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>28835546</pmid><doi>10.15252/embr.201743903</doi><tpages>20</tpages><orcidid>https://orcid.org/0000-0001-8460-5952</orcidid><orcidid>https://orcid.org/0000-0002-5462-9301</orcidid><oa>free_for_read</oa></addata></record>
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subjects A549 Cells
Agglomeration
Dictyostelium - microbiology
Dictyostelium discoideum
Dynamin
EMBO20
EMBO23
Endoplasmic reticulum
Endoplasmic Reticulum - microbiology
Endoplasmic Reticulum - physiology
GTP-Binding Proteins - genetics
GTP-Binding Proteins - metabolism
Guanosine triphosphatases
Guanosine triphosphate
Humans
Intracellular
Legionella
Legionella pneumophila - growth & development
Legionella pneumophila - pathogenicity
Legionnaires' disease bacterium
macrophage
Macrophages - microbiology
Maturation
Membrane Proteins - genetics
Membrane Proteins - metabolism
Nogo Proteins - genetics
Nogo Proteins - metabolism
pathogen vacuole
Pathogens
phosphoinositide lipid
Proteomics
Recruitment
Replication
type IV secretion
Type IV Secretion Systems
Vacuoles - metabolism
Vacuoles - microbiology
Yeast
Yeasts
title ER remodeling by the large GTPase atlastin promotes vacuolar growth of Legionella pneumophila
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