PXD036349

PXD036349 is an original dataset announced via ProteomeXchange.

Title	Profiling proteome changes during polyamine depletion within the Leishmania donovani polyamine pathway gene deletion mutants, del-odc (ornithine decarboxylase) and del-spdsyn (spermidine synthase)
Description	Polyamines are aliphatic polycations that have emerged as important determinants of cell growth and viability in rapidly proliferating cells, including in the pathogenic protozoan parasite Leishmania donovani. In L. donovani, the polyamine spermidine is synthesized by the successive conversion of ornithine into putrescine (catalyzed by ornithine decarboxylase or ODC) and putrescine into spermidine (catalyzed by spermidine synthase or SPDSYN). Deletion of either ODC (del-odc) or SPDSYN (del-spdsyn) from the L. donovani genome renders these parasites auxotrophic for polyamines and these mutants are impaired in their ability to survive both in culture and within the mammalian host without the addition of exogenous polyamine supplementation. Significantly, del-odc parasites immediately cease proliferation after putrescine is removed from the culture media and perish within two weeks, while spermidine starved del-spdsyn mutants, which retain intracellular putrescine pools, show a slow-growth phenotype, and persist for several weeks in culture. To elucidate the key differences within the proteome of putrescine-starved del-odc cells and spermidine-starved del-spdsyn parasites, a shotgun quantitative proteomics approach was undertaken using TMT labeling and LC-MS/MS analysis. Briefly, three biological replicates each for mid-log phase del-odc and del-spdsyn promastigotes grown in the presence of exogenous putrescine (for del-odc) or spermidine (for del-spdsyn) supplementation were washed to remove the exogenous polyamine supplementation and incubated in polyamine-free media. At 24 and 48 h, cells from each biological replicate were isolated and prepared for tandem mass tag (TMT) labeling and downstream LC-MS/MS analyses. Peptides were identified using a database generated from the reference genome of L. donovani BPK282A1 strain. Changes in relative protein abundance for the polyamine-starved del-odc and del-spdsyn cell lines at 24 and 48 h were calculated by comparing aggregate total reporter ion intensities for each protein to that of the corresponding polyamine-supplemented 0-h timepoint.
HostingRepository	PRIDE
AnnounceDate	2022-08-30
AnnouncementXML	Submission_2022-08-30_03:35:31.862.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Phillip Wilmarth
SpeciesList	scientific name: Leishmania donovani BPK282A1; NCBI TaxID: 981087;
ModificationList	TMT6plex-126 reporter+balance reagent acylated residue; monohydroxylated residue; iodoacetamide derivatized residue
Instrument	Orbitrap Fusion

Revision	Datetime	Status	ChangeLog Entry
0	2022-08-27 06:01:41	ID requested
⏵ 1	2022-08-30 03:35:32	announced

Dataset with its publication pending

submitter keyword: Leishmania, polyamine, starvation, stress-response, spermidine synthase, ornithine decarboxylase, quantitative proteomics, tandem mass tags, PSR-OHSU

Nicola S. Carter
contact affiliation	School of Pharmacy Pacific University of Oregon 222 SE 8th Ave, Ste 451, Hillsboro, OR 97123, USA
contact email	cartern@pacificu.edu
lab head
Phillip Wilmarth
contact affiliation	OHSU
contact email	wilmarth@ohsu.edu
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD036349
     1. Label: PRIDE project
     2. Name: Profiling proteome changes during polyamine depletion within the Leishmania donovani polyamine pathway gene deletion mutants, del-odc (ornithine decarboxylase) and del-spdsyn (spermidine synthase)