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Identification of Proteins Associated with Multilamellar Bodies Produced by Dictyostelium discoideum

Dictyostelium discoideum amoebae produce and secrete multilamellar bodies (MLBs) when fed digestible bacteria. The aim of the present study was to elucidate the proteic content of MLBs. The lipid composition of MLBs is mainly amoebal in origin, suggesting that MLB formation is a protozoa-driven proc...

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Autores principales: Denoncourt, Alix M., Paquet, Valérie E., Sedighi, Ahmadreza, Charette, Steve J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4920372/
https://www.ncbi.nlm.nih.gov/pubmed/27340834
http://dx.doi.org/10.1371/journal.pone.0158270
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author Denoncourt, Alix M.
Paquet, Valérie E.
Sedighi, Ahmadreza
Charette, Steve J.
author_facet Denoncourt, Alix M.
Paquet, Valérie E.
Sedighi, Ahmadreza
Charette, Steve J.
author_sort Denoncourt, Alix M.
collection PubMed
description Dictyostelium discoideum amoebae produce and secrete multilamellar bodies (MLBs) when fed digestible bacteria. The aim of the present study was to elucidate the proteic content of MLBs. The lipid composition of MLBs is mainly amoebal in origin, suggesting that MLB formation is a protozoa-driven process that could play a significant role in amoebal physiology. We identified four major proteins on purified MLBs using mass spectrometry in order to better understand the molecular mechanisms governing MLB formation and, eventually, to elucidate the true function of MLBs. These proteins were SctA, PhoPQ, PonC and a protein containing a cytidine/deoxycytidylate deaminase (CDD) zinc-binding region. SctA is a component of pycnosomes, which are membranous materials that are continuously secreted by amoebae. The presence of SctA on MLBs was confirmed by immunofluorescence and Western blotting using a specific anti-SctA antibody. The CDD protein may be one of the proteins recognized by the H36 antibody, which was used as a MLB marker in a previous study. The function of the CDD protein is unknown. Immunofluorescence and flow cytometric analyses confirmed that the H36 antibody is a better marker of MLBs than the anti-SctA antibody. This study is an additional step to elucidate the potential role of MLBs and revealed that only a small set of proteins appeared to be present on MLBs.
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spelling pubmed-49203722016-07-18 Identification of Proteins Associated with Multilamellar Bodies Produced by Dictyostelium discoideum Denoncourt, Alix M. Paquet, Valérie E. Sedighi, Ahmadreza Charette, Steve J. PLoS One Research Article Dictyostelium discoideum amoebae produce and secrete multilamellar bodies (MLBs) when fed digestible bacteria. The aim of the present study was to elucidate the proteic content of MLBs. The lipid composition of MLBs is mainly amoebal in origin, suggesting that MLB formation is a protozoa-driven process that could play a significant role in amoebal physiology. We identified four major proteins on purified MLBs using mass spectrometry in order to better understand the molecular mechanisms governing MLB formation and, eventually, to elucidate the true function of MLBs. These proteins were SctA, PhoPQ, PonC and a protein containing a cytidine/deoxycytidylate deaminase (CDD) zinc-binding region. SctA is a component of pycnosomes, which are membranous materials that are continuously secreted by amoebae. The presence of SctA on MLBs was confirmed by immunofluorescence and Western blotting using a specific anti-SctA antibody. The CDD protein may be one of the proteins recognized by the H36 antibody, which was used as a MLB marker in a previous study. The function of the CDD protein is unknown. Immunofluorescence and flow cytometric analyses confirmed that the H36 antibody is a better marker of MLBs than the anti-SctA antibody. This study is an additional step to elucidate the potential role of MLBs and revealed that only a small set of proteins appeared to be present on MLBs. Public Library of Science 2016-06-24 /pmc/articles/PMC4920372/ /pubmed/27340834 http://dx.doi.org/10.1371/journal.pone.0158270 Text en © 2016 Denoncourt et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Denoncourt, Alix M.
Paquet, Valérie E.
Sedighi, Ahmadreza
Charette, Steve J.
Identification of Proteins Associated with Multilamellar Bodies Produced by Dictyostelium discoideum
title Identification of Proteins Associated with Multilamellar Bodies Produced by Dictyostelium discoideum
title_full Identification of Proteins Associated with Multilamellar Bodies Produced by Dictyostelium discoideum
title_fullStr Identification of Proteins Associated with Multilamellar Bodies Produced by Dictyostelium discoideum
title_full_unstemmed Identification of Proteins Associated with Multilamellar Bodies Produced by Dictyostelium discoideum
title_short Identification of Proteins Associated with Multilamellar Bodies Produced by Dictyostelium discoideum
title_sort identification of proteins associated with multilamellar bodies produced by dictyostelium discoideum
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4920372/
https://www.ncbi.nlm.nih.gov/pubmed/27340834
http://dx.doi.org/10.1371/journal.pone.0158270
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