The arginine sensing and transport binding sites are distinct in the human pathogen Leishmania.
The intracellular protozoan parasite Leishmania donovani causes human visceral leishmaniasis. Intracellular L. donovani that proliferate inside macrophage phagolysosomes compete with the host for arginine, creating a situation that endangers parasite survival. Parasites have a sensor that upon argin...
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ftdoajarticles:oai:doaj.org/article:546d2493ad314a99ab6277b326ee3c68 2023-05-15T15:04:37+02:00 The arginine sensing and transport binding sites are distinct in the human pathogen Leishmania. Harsh Pawar Madhu Puri Renana Fischer Weinberger Rentala Madhubala Dan Zilberstein 2019-04-01T00:00:00Z https://doi.org/10.1371/journal.pntd.0007304 https://doaj.org/article/546d2493ad314a99ab6277b326ee3c68 EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pntd.0007304 https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0007304 https://doaj.org/article/546d2493ad314a99ab6277b326ee3c68 PLoS Neglected Tropical Diseases, Vol 13, Iss 4, p e0007304 (2019) Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 article 2019 ftdoajarticles https://doi.org/10.1371/journal.pntd.0007304 2022-12-31T06:00:46Z The intracellular protozoan parasite Leishmania donovani causes human visceral leishmaniasis. Intracellular L. donovani that proliferate inside macrophage phagolysosomes compete with the host for arginine, creating a situation that endangers parasite survival. Parasites have a sensor that upon arginine deficiency activates an Arginine Deprivation Response (ADR). L. donovani transport arginine via a high-affinity transporter (LdAAP3) that is rapidly up-regulated by ADR in intracellular amastigotes. To date, the sensor and its ligand have not been identified. Here, we show that the conserved amidino group at the distal cap of the arginine side chain is the ligand that activates ADR, in both promastigotes and intracellular amastigotes, and that arginine sensing and transport binding sites are distinct in L. donovani. Finally, upon addition of arginine and analogues to deprived cells, the amidino ligand activates rapid degradation of LdAAP3. This study provides the first identification of an intra-molecular ligand of a sensor that acts during infection. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic PLOS Neglected Tropical Diseases 13 4 e0007304 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
spellingShingle |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 Harsh Pawar Madhu Puri Renana Fischer Weinberger Rentala Madhubala Dan Zilberstein The arginine sensing and transport binding sites are distinct in the human pathogen Leishmania. |
topic_facet |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
description |
The intracellular protozoan parasite Leishmania donovani causes human visceral leishmaniasis. Intracellular L. donovani that proliferate inside macrophage phagolysosomes compete with the host for arginine, creating a situation that endangers parasite survival. Parasites have a sensor that upon arginine deficiency activates an Arginine Deprivation Response (ADR). L. donovani transport arginine via a high-affinity transporter (LdAAP3) that is rapidly up-regulated by ADR in intracellular amastigotes. To date, the sensor and its ligand have not been identified. Here, we show that the conserved amidino group at the distal cap of the arginine side chain is the ligand that activates ADR, in both promastigotes and intracellular amastigotes, and that arginine sensing and transport binding sites are distinct in L. donovani. Finally, upon addition of arginine and analogues to deprived cells, the amidino ligand activates rapid degradation of LdAAP3. This study provides the first identification of an intra-molecular ligand of a sensor that acts during infection. |
format |
Article in Journal/Newspaper |
author |
Harsh Pawar Madhu Puri Renana Fischer Weinberger Rentala Madhubala Dan Zilberstein |
author_facet |
Harsh Pawar Madhu Puri Renana Fischer Weinberger Rentala Madhubala Dan Zilberstein |
author_sort |
Harsh Pawar |
title |
The arginine sensing and transport binding sites are distinct in the human pathogen Leishmania. |
title_short |
The arginine sensing and transport binding sites are distinct in the human pathogen Leishmania. |
title_full |
The arginine sensing and transport binding sites are distinct in the human pathogen Leishmania. |
title_fullStr |
The arginine sensing and transport binding sites are distinct in the human pathogen Leishmania. |
title_full_unstemmed |
The arginine sensing and transport binding sites are distinct in the human pathogen Leishmania. |
title_sort |
arginine sensing and transport binding sites are distinct in the human pathogen leishmania. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2019 |
url |
https://doi.org/10.1371/journal.pntd.0007304 https://doaj.org/article/546d2493ad314a99ab6277b326ee3c68 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
PLoS Neglected Tropical Diseases, Vol 13, Iss 4, p e0007304 (2019) |
op_relation |
https://doi.org/10.1371/journal.pntd.0007304 https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0007304 https://doaj.org/article/546d2493ad314a99ab6277b326ee3c68 |
op_doi |
https://doi.org/10.1371/journal.pntd.0007304 |
container_title |
PLOS Neglected Tropical Diseases |
container_volume |
13 |
container_issue |
4 |
container_start_page |
e0007304 |
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1766336354026782720 |