Proteome-wide identification of mycobacterial pupylation targets
Ontology highlight
ABSTRACT:
INSTRUMENT(S): QSTAR XL
ORGANISM(S): Mycobacterium Smegmatis
SUBMITTER: 
A Jeon
LAB HEAD: A Jeon
PROVIDER: PRD000821 | Pride | 2010-09-14
REPOSITORIES: Pride
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| PRIDE_Exp_Complete_Ac_11999.pride.mgf.gz | Mgf | |||
| PRIDE_Exp_Complete_Ac_11999.xml.gz | Xml |
Items per page: 5 1 - 2 of 2 |
Similar Datasets
Project description:Mycobacteria use a unique system for covalently modifying proteins based on the conjugation of a small protein, referred to as prokaryotic ubiquitin-like protein (PUP). In this study, we report a proteome-wide analysis of endogenous pupylation targets in the model organism Mycobacterium smegmatis. On affinity capture, a total of 243 candidate pupylation targets were identified by two complementary proteomics approaches. For 41 of these protein targets, direct evidence for a total of 48 lysine-mediated pupylation acceptor sites was obtained by collision-induced dissociation spectra. For the majority of these pupylation targets (38 of 41), orthologous genes are found in the M. tuberculosis genome. Interestingly, approximately half of these proteins are involved in intermediary metabolism and respiration pathways. A considerable fraction of the remaining targets are involved in lipid metabolism, information pathways, and virulence, detoxification and adaptation. Approximately one-third of the genes encoding these targets are located in seven gene clusters, indicating functional linkages of mycobacterial pupylation targets. A comparison of the pupylome under different cell culture conditions indicates that substrate targeting for pupylation is rather dynamic.
| S-EPMC2925521 | biostudies-literature
Project description:Mycobacterium tuberculosis can use a proteasome to degrade proteins when they are post-translationally modified with prokaryotic ubiquitin-like protein (Pup). While pupylation is reversible, mechanisms regulating depupylation have not been identified. Here, we identify a depupylation regulator, CoaX, a pseudo-pantothenate kinase. Pantothenate synthesis enzymes were more abundant in a ∆coaX mutant, including PanB, a substrate of the Pup-proteasome system. Media supplementation with pantothenate decreased PanB levels in a coaX and Pup-proteasome system-dependent manner. In vitro, CoaX accelerated depupylation of Pup~PanB, while addition of pantothenate inhibited this reaction. Collectively, we propose CoaX contributes to proteasomal degradation of PanB by modulating depupylation of Pup~PanB in response to pantothenate levels.
2024-11-01 | GSE260838 | GEO
Project description:In a manner similar to ubiquitin, the prokaryotic ubiquitin-like protein (Pup) has been shown to target proteins for degradation via the proteasome in mycobacteria. However, not all actinobacteria possessing the Pup protein also harbor a proteasome, suggesting fates for pupylated proteins other than degradation via a proteasome or degradation at all. In the present study we set out to study pupylation in the proteasome-lacking non-pathogenic model microorganism and biotechnological workhorse Corynebacterium glutamicum. A defined pup deletion mutant of C. glutamicum ATCC 13032 grew as the control indicating that pupylation seems to be dispensable under the conditions tested. By expression of homologous Pup carrying a poly-histidine tag in C. glutamicum ATCC 13032 we purified the first pupylome of a microorganism lacking a proteasome. Multidimensional Protein Identification Technology (MudPIT) unraveled 54 proteins being pupylated in this organism. Similar to mycobacteria, the majority of pupylated proteins in C. glutamicum can be classified as enzymes of the metabolism or as involved in translation. These results help to elucidate the common target pathways of pupylation in bacteria.
2014-06-24 | GSE48038 | GEO
Project description:Mycobacterium smegmatis is a soil bacterium exposed to continuously environmental changes of nitrogen availability. As member of Actinobacteria, it possesses an ubiquitin-like post-translational modification pathway called pupylation. The pathway starts when a small protein called Pup is attached to a lysine of a specific cellular target. Then the Pup-modified protein is degraded by the proteasome, as it was shown that Pup acts as degradation signal. Recent studies showed the role of pupylation in Mycobacterium smegmatis for survival under nitrogen starvation by supplying recycled amino acids. The present study is an investigation of the influence of Mycobacterium smegmatis Pup protein on the whole proteome in absence of nitrogen sources. Therefore a pup deletion mutant was generated. Applying stable isotope dimethyl labelling, low impact of the pupylation on proteome was revealed immediately after exposure to growth medium lacking nitrogen. In contrast, post 24 h of nitrogen starvation, Msm pup deletion strain showed several proteins with significant changes in abundance. Noteworthy, key proteins involved in nitrogen assimilation were significantly affected in Msm Δpup. Furthermore, we label-free quantified pupylated proteins of nitrogen starved Msm for a more extensive understanding of pupylation role in surviving and overcoming the lack of nitrogen.
2016-08-11 | PXD003229 | Pride
Project description:We introduce pupylation-based proximity labelling (PUP-IT) as a tool for protein interaction detection in plant biology. We show that PUP-IT readily confirmed and extended protein interactions for several known protein complexes, across different types of plant systems.
2025-01-10 | PXD048346 | Pride
Project description:Pupylation is a posttranslational protein modification in bacteria resembling ubiquitination in eukaryotes. The prokaryotic ubiquitin-like protein Pup is covalently attached to other proteins via an isopeptide bond between its carboxyterminal glutamate residue and a lysine residue in the target. In mycobacteria, pupylation was shown to mark proteins for unfolding by the ATPase Mpa and subsequent degradation by the proteasome. However, the occurrence of pupylation in species without a proteasome like Corynebacterium glutamicum suggests that degradation may not be the only fate of pupylated proteins. The Îpup mutant senses a stronger iron limitation than the wild type. Among the 125 genes showing at least 2-fold changes in transcript levels in the Îpup mutant (p-value ⤠0.05) were 54% of all genes known to be regulated by the master regulator of iron homeostasis DtxR (Brune et al., 2006; Wennerhold and Bott, 2006). Except for ftn, which is activated by DtxR and showed a 2-fold decreased mRNA level, the other DtxR target genes showed increased mRNA levels in the Îpup strain. These included ripA, encoding a transcriptional regulator of iron proteins, which represses a number of prominent iron-containing proteins under iron limitation, such as aconitase or succinate dehydrogenase (Wennerhold et al., 2005). 79% of the known RipA target genes showed decreased mRNA levels in the Îpup strain. DNA microarray analyses were performed to compare the mRNA levels of the C. glutamicum Îpup mutant and its parent wild type under iron-limited conditions. The two strains precultivated in CGXII medium with 4% (w/v) glucose and 1 µM FeSO4 were inoculated into fresh medium to an OD600 of 1, cultured for 2 h, and harvested on ice by centrifugation (5 min at 4,000 g and 4°C). Please note that the GPL16989 array design comprises oligos for 4 different bacterial genomes. In the GPR-files in this study, all IDs/Names (oligonucleotides) which are not from the host C. glutamicum were replaced by the text EMPTY since only C. glutamicum expression was analyzed.
2016-04-04 | E-GEOD-64866 | biostudies-arrayexpress
Project description:Pupylation is a bacterial post-translational modification of target proteins on lysine residues with prokaryotic ubiquitin-like protein Pup. Pup-tagged substrates are recognized by a proteasome-interacting ATPase termed Mpa in Mycobacterium tuberculosis. Mpa unfolds pupylated substrates and threads them into the proteasome core particle for degradation. Interestingly, Mpa itself is also a pupylation target. Here, we show that the Pup ligase PafA predominantly produces monopupylated Mpa modified homogeneously on a single lysine residue within its C-terminal region. We demonstrate that this modification renders Mpa functionally inactive. Pupylated Mpa can no longer support Pup-mediated proteasomal degradation due to its inability to associate with the proteasome core. Mpa is further inactivated by rapid Pup- and ATPase-driven deoligomerization of the hexameric Mpa ring. We show that pupylation of Mpa is chemically and functionally reversible. Mpa regains its enzymatic activity upon depupylation by the depupylase Dop, affording a rapid and reversible activity control over Mpa function.
| S-EPMC3318712 | biostudies-literature
Project description:B-cell leukemia/lymphoma 11B (Bcl11b) is a transcription factor showing predominant expression in the striatum. To date, there are no known gene targets of Bcl11b in the nervous system. Here, we define targets for Bcl11b in striatal cells by performing genome-wide expression profiling. Transcriptome-wide analysis revealed that 694 genes were significantly altered in striatal cells over-expressing Bcl11b, including genes showing striatal-enriched expression similar to Bcl11b. Functional analysis on the gene target list identified significant association of Bcl11b to brain-derived neurotrophic factor/neurotrophin signaling. These data implicate Bcl11b as a novel regulator of the BDNF signaling pathway, which is disrupted in many neurological disorders. n=4 wt STHdh striatal cells and n=4 Bcl11b-transfected STHdh striatal cells
2011-08-01 | E-GEOD-31096 | biostudies-arrayexpress
Project description:FERONIA (FER) is a ubiquitious expressed and a plasma memberane-localized receptor-like protein kinase which modulate many biological functions. Elucidating the interacting proteins is the crucial step in understanding the molecular function of FER in regulating plant development. However, weak and transient interactions make identifying FER interacting proteins a challenge. Here, we adapted a novel proximity-based labelling technique, pupylation-based interaction tagging (PUP-IT), to label interacting proteins, subsequent enriched by affinity capture, and analyzed by liquid chromatography-coupled tandem mass spectrometery (LC-MS/MS) to profile FER interacting proteins. To perform a quick screen, a transient protoplasts expression system was conducted to identify interacting proteins in mesophyll cells. In addition, we generated a transgenic line that harboring a tagging substrate-inducible system and FER-ligase recombinant protein driven by a native promoter for surveying the interacting proteins in seedlings and flower organ. We introduce and prove the concept of PUP-IT tool designed to detect protein interactions of significance in plants.
2024-08-13 | PXD052510 | Pride
Project description:FERONIA (FER) is a ubiquitious expressed and a plasma memberane-localized receptor-like protein kinase which modulate many biological functions. Elucidating the interacting proteins is the crucial step in understanding the molecular function of FER in regulating plant development. However, weak and transient interactions make identifying FER interacting proteins a challenge. Here, we adapted a novel proximity-based labelling technique, pupylation-based interaction tagging (PUP-IT), to label interacting proteins, subsequent enriched by affinity capture, and analyzed by liquid chromatography-coupled tandem mass spectrometery (LC-MS/MS) to profile FER interacting proteins. To perform a quick screen, a transient protoplasts expression system was conducted to identify interacting proteins in mesophyll cells. In addition, we generated a transgenic line that harboring a tagging substrate-inducible system and FER-ligase recombinant protein driven by a native promoter for surveying the interacting proteins in seedlings and flower organ. We introduce and prove the concept of PUP-IT tool designed to detect protein interactions of significance in plants.
2024-08-13 | PXD045546 | Pride