The Legionella effector RidL inhibits retrograde trafficking to promote intracellular replication
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The Legionella effector RidL inhibits retrograde trafficking to promote intracellular replication. / Finsel, Ivo; Ragaz, Curdin; Hoffmann, Christine; Harrison, Christopher F; Weber, Stephen; van Rahden, Vanessa A; Johannes, Ludger; Hilbi, Hubert.
In: CELL HOST MICROBE, Vol. 14, No. 1, 17.07.2013, p. 38-50.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - The Legionella effector RidL inhibits retrograde trafficking to promote intracellular replication
AU - Finsel, Ivo
AU - Ragaz, Curdin
AU - Hoffmann, Christine
AU - Harrison, Christopher F
AU - Weber, Stephen
AU - van Rahden, Vanessa A
AU - Johannes, Ludger
AU - Hilbi, Hubert
N1 - Copyright © 2013 Elsevier Inc. All rights reserved.
PY - 2013/7/17
Y1 - 2013/7/17
N2 - The bacteria causing Legionnaires' disease, Legionella pneumophila, replicate intracellularly within unique Legionella-containing vacuoles (LCVs). LCV formation involves a type IV secretion system (T4SS) that translocates effector proteins into host cells. We show that the T4SS effector RidL localizes to LCVs, supports intracellular bacterial growth, and alters retrograde trafficking, in which selected proteins are transported from endosomes to the Golgi. The retromer complex that mediates retrograde trafficking localizes to LCVs independently of RidL and restricts intracellular bacterial growth. RidL binds the Vps29 retromer subunit and the lipid PtdIns(3)P, which localizes retromer components to membranes. Additionally, specific retromer cargo receptors and sorting nexins that mediate protein capture and membrane remodeling preferentially localize to LCVs in the absence of ridL. Ectopic RidL production inhibits retrograde trafficking, and L. pneumophila blocks retrograde transport at endosome exit sites in a ridL-dependent manner. Collectively, these findings suggest that RidL inhibits retromer function to promote intracellular bacterial replication.
AB - The bacteria causing Legionnaires' disease, Legionella pneumophila, replicate intracellularly within unique Legionella-containing vacuoles (LCVs). LCV formation involves a type IV secretion system (T4SS) that translocates effector proteins into host cells. We show that the T4SS effector RidL localizes to LCVs, supports intracellular bacterial growth, and alters retrograde trafficking, in which selected proteins are transported from endosomes to the Golgi. The retromer complex that mediates retrograde trafficking localizes to LCVs independently of RidL and restricts intracellular bacterial growth. RidL binds the Vps29 retromer subunit and the lipid PtdIns(3)P, which localizes retromer components to membranes. Additionally, specific retromer cargo receptors and sorting nexins that mediate protein capture and membrane remodeling preferentially localize to LCVs in the absence of ridL. Ectopic RidL production inhibits retrograde trafficking, and L. pneumophila blocks retrograde transport at endosome exit sites in a ridL-dependent manner. Collectively, these findings suggest that RidL inhibits retromer function to promote intracellular bacterial replication.
KW - Animals
KW - Bacterial Proteins
KW - Cell Line
KW - Endosomes
KW - Humans
KW - Legionella pneumophila
KW - Legionnaires' Disease
KW - Mice
KW - Protein Transport
KW - Vacuoles
U2 - 10.1016/j.chom.2013.06.001
DO - 10.1016/j.chom.2013.06.001
M3 - SCORING: Journal article
C2 - 23870312
VL - 14
SP - 38
EP - 50
JO - CELL HOST MICROBE
JF - CELL HOST MICROBE
SN - 1931-3128
IS - 1
ER -