Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Phosphorylation dynamics in neuronal cells

ABSTRACT: We performed global phosphorylation quantitative proteomics analysis of neuronal HT-22 cells in response to iron deficiency. Our data applied SILAC-based quantitative analysis with replicates and studied the phosphorylation dynamics under acute, chronic iron deficiency as well as acute hypoxia.

INSTRUMENT(S): LTQ Orbitrap

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Permanent Cell Line Cell, Cell Culture

DISEASE(S): Disease Free

SUBMITTER: Yue Chen

LAB HEAD: Yue Chen

PROVIDER: PXD023294 | Pride | 2021-09-09

REPOSITORIES: Pride

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
	Maxquant_data.zip	Other
	YC_OrbitrapLUMOS_20181119_01.raw	Raw
	YC_OrbitrapLUMOS_20181119_07.raw	Raw
	YC_OrbitrapLUMOS_20181119_10.raw	Raw
	YC_OrbitrapLUMOS_20181119_13.raw	Raw

Items per page:

1 - 5 of 25

Publications

Iron Deficiency Reprograms Phosphorylation Signaling and Reduces O-GlcNAc Pathways in Neuronal Cells.

Erber Luke N LN Luo Ang A Gong Yao Y Beeson Montana M Tu Maolin M Tran Phu P Chen Yue Y

Nutrients 20210108 1

Micronutrient sensing is critical for cellular growth and differentiation. Deficiencies in essential nutrients such as iron strongly affect neuronal cell development and may lead to defects in neuronal function that cannot be remedied by subsequent iron supplementation. To understand the adaptive intracellular responses to iron deficiency in neuronal cells, we developed and utilized a Stable Isotopic Labeling of Amino acids in Cell culture (SILAC)-based quantitative phosphoproteomics workflow. O ...[more]

PMID: 33430126

Similar Datasets

Protein and peptide turnover measurements using pulsed SILAC-TMT approach

Project description:We evaluated the feasibility of a workflow combining dynamic SILAC experiments with tandem mass tag (TMT)-labeling of ten pulse time-points. Replicate analysis established that the same reproducibility of turnover rates can be obtained for peptides as for proteins facilitating proteoform resolved investigation of protein stability.

2018-02-09 | PXD008579 | Pride

SILAC phosphoproteome analysis upon transient Abl1/2 or DDR1 knockdown in human U-2 OS cells

Project description:Analysis of changes in the phosphoproteome upon transient siRNA-mediated knockdown of ABL1/ABL2 or DDR1 for 48 hours. CILAC phosphoproteome analysis was conducted after 48hrs using human U-2 OS cells.

2023-10-24 | PXD023146 | Pride

Nuclear GTPSCS functions as a lactyl-CoA synthetase to promote histone lactylation

Project description:Histone lysine lactylation is a physiologically and pathologically relevant epigenetic pathway that can be stimulated by the Warburg effect and L-lactate. Nevertheless, the mechanism by which cells use L-lactate to generate lactyl-CoA, the cofactor for the modification, and how this process is regulated remain unknown. Here we report identification of GTPSCS as a lactyl-CoA synthetase in the nucleus using biochemistry and cell biology approaches. The mechanism of this catalytic activity was elucidated using the crystallographic structure of GTPSCS in complex with L-lactate, followed by mutagenesis experiments. GTPSCS translocates into the nucleus and interacts with p300 to form a functional lactyltransferase to elevate histone lactylation, but not histone succinylation. This process is dependent on not only a nuclear localization signal in the GTPSCS G1 subunit, but also acetylation at G2 subunit residue K73 which mediates the interaction with p300. GTPSCS-p300 collaboration synergistically regulates histone H3K18la, subsequently enhancing the expression of GDF15. This process promotes the proliferation and radioresistance of gliomas. The GTPSCS represents the inaugural enzyme that can catalyze lactyl-CoA synthesis for epigenetic histone lactylation and regulate oncogenic gene expression patterns in glioma.

2024-12-02 | PXD056791 | Pride

Linking post-translational modifications and protein turnover by site-resolved protein turnover (SPOT) profiling

Project description:Proteome-wide measurements of protein turnover have largely ignored the impact of post-translational modifications (PTMs). To address this gap, we employ stable isotope labelling and mass spectrometry to measure the turnover of >120,000 peptidoforms including >33,000 phosphorylated, acetylated and ubiquitinated peptides for >9,000 native proteins. This site-resolved protein turnover (SPOT) profiling discloses global and site-specific differences in turnover associated with the presence or absence of PTMs. While causal relationships may not always be immediately apparent, we hypothesize that PTMs with diverging turnover may distinguish states of differential protein stability, structure, localization, enzymatic activity, or protein-protein interactions. We exemplify how the turnover data may facilitate insights into unknown functions of PTMs and provide a web-tool for the scientific community that allows interrogation and visualisation of all turnover data. Since the methodology is applicable to many cell types and modifications, it has substantial potential to prioritize PTMs for functional investigation in the future.

2021-11-10 | PXD023218 | Pride

Quantitative profiling of the enzymatic activity of the protein lysine mono-methyltransferase SMYD2 using SILAC-based proteomics

Project description:The significance of non-histone lysine methylation in cell biology and human disease is an emerging area of research exploration, and small molecule inhibitors that selectively and potently target “writers” and “erasers” of methyl-lysine, such as the protein lysine mono-methyltransferase SMYD2, are active areas of drug discovery. It is therefore essential to clarify the substrates of these enzymes in cellular contexts in order to advance and to correctly understand the cellular mechanism(s) of action of these targets. Here, using stable isotopic labelling of amino acids in cell culture (SILAC) coupled with immunoaffinity enrichment of mono-methyl-lysine (Kme1) peptides and mass spectrometry, we report the most comprehensive and large-scale proteomic study of protein mono-methylation, comprising a total of 1032 Kme1 sites identified in esophageal squamous cell carcinoma (ESCC) cells and 1861 Kme1 sites in ESCC cells overexpressing SMYD2. Among these sites was a subset of 35 robust Kme1 sites that were potently down-regulated by both shRNA-mediated knockdown of SMYD2 and LLY-507, a small molecule inhibitor of SMYD2. In addition, we report specific protein sequence motifs that were enriched in Kme1 sites and that were also directly regulated by endogenous SMYD2 activity, indicating that the diversity of SMYD2 substrate specificity of SMYD2 exceeds previous expectations. Furthermore, we reveal that BTF3 and PDAP1 are novel and direct substrates of SMYD2, as well as AHNAK and AHNAK2, two large and highly-repetitive proteins directly and extensively mono-methylated by SMYD2 at several lysine residues. Collectively, our findings provide novel quantitative and insights into the cellular activity and substrate recognition of SMYD2 as well as the global landscape and regulation of protein mono-methylation in cells.

2016-01-11 | PXD002405 | Pride

SILAC APMS analysis of NAF1 interactome in HEK-293 cells

Project description:The conserved box H/ACA RNPs consist of one box H/ACA RNA and 4 core proteins: Dyskerin, NHP2, NOP10 and GAR1. The assembly of the H/ACA RNPs is a stepwise process which requires several assembly factors: SHQ1, NAF1, the Survival of Motor Neuron complex SMN, and the R2TP complex. It implicates the co-transcriptional assembly of a pre-particle containing the nascent RNAs, Dyskerin, NOP10, NHP2 and NAF1. The latest keeps the H/ACA RNP inactive, and needs to be replaced by GAR1 to produce mature and functional H/ACA RNPs in the Cajal bodies. In this study, we explore in details the molecular mechanism leading to the assembly of mature box H/ACA RNPs. MS analysis of purified GAR1 revealed new sites of arginine methylations in the two GAR domains of GAR1, and showed that most of these methylated arginines exist both in mono-methylated and di-methylated forms in cells. By different methods, we showed that unmethylated GAR1 is correctly incorporated in H/ACA RNPs. We performed extensive analysis of GAR1, NHP2 and NAF1 proteomes by quantitative stable isotope labeling by amino acids in cell culture proteomic analyses (SILAC), and revealed new assembly intermediates: 1) an early protein-only pre-H/ACA RNP complex containing the core proteins DKC1, NOP10 and NHP2, and the assembly factors SHQ1 and NAF1, and 2) a late assembly intermediates containing the RNA, the core proteins and NAF1. We showed that the SMN complex is associated with late forming H/ACA pre-RNP complexes containing GAR1. Moreover, our study identifies new proteins highly and specifically associated with GAR1, NHP2 and NAF1, suggesting their importance in box H/ACA assembly or function, such as the PRMT1 and PRMT5 arginine methylases.

2022-02-17 | PXD026747 | Pride

SILAC APMS analysis of SHQ1 interactome in HEK-293 cells

2023-05-10 | PXD035330 | Pride

USP32 regulates late endosomal transport and recycling through deubiquitylation of Rab7

Project description:The endosomal system is a highly dynamic multifunctional organelle, whose complexity is regulated in part by reversible ubiquitylation. Despite the wide-ranging influence of ubiquitin in endosomal processes, relatively few enzymes utilizing ubiquitin have been described to control endosome integrity and function. Here we reveal the deubiquitylating enzyme (DUB) ubiquitin-specific protease 32 (USP32) as a powerful new player in this context. Loss of USP32 inhibits late endosome (LE) transport and recycling of LE cargos to the TGN, resulting in dispersion and swelling of the late compartment. Using SILAC-based ubiquitome profiling we identify the small GTPase Rab7—the logistical centerpiece of LE biology—as a substrate of USP32. Mechanistic studies reveal that LE transport effector RILP prefers ubiquitylation-deficient Rab7, while retromer-mediated LE recycling benefits from an intact cycle of Rab7 ubiquitylation. Collectively, our observations suggest that reversible ubiquitylation helps switch Rab7 between its various functions, thereby maintaining global spatiotemporal order in the endosomal system.

2019-03-20 | PXD011899 | Pride

Nuclear GTPSCS functions as a lactyl-CoA ligase to promote histone lactylation and glioma progression

Project description:Histone lysine lactylation is a physiologically relevant epigenetic pathway that can be stimulated by the Warburg effect and hypoxia-associated L-lactate. Nevertheless, the mechanism by which cells use L-lactate to generate lactyl-CoA, the cofactor for the modification, and how this process is regulated remain unknown. Here, we report the identification of GTPSCS as a lactyl-CoA ligase using biochemistry and cell biology approaches. The mechanism of this catalytic activity was elucidated using the crystallographic structure of GTPSCS in complex with L-lactate, followed by mutagenesis experiments. GTPSCS translocates into the nucleus and interacts with p300 to form a functional lactyltransferase to elevate histone H3 lysine 18 lactylation (H3K18la). This process is dependent on not only a nuclear localization signal in the GTPSCS G1 subunit but also acetylation at the G2 subunit residue K73 (for the interaction between GTPSCS and p300). GTPSCS-p300-mediated histone H3K18la promotes glioma cell proliferation and tumor formation in mice. In addition, histone H3K18la is positively associated with glioma grade and poor prognosis in glioma patients. The LDHA-GTPSCS-lactyltransferase-histone Kla axis thus represents a signal-stimulated epigenetic pathway that mediates the downstream impact of the Warburg effect and hypoxia

2024-12-04 | PXD037672 | Pride

Global Lysine Acetylome Analysis of LPS-Stimulated HepG2 Cells Identifies Hyperacetylation of PKM2 as a Metabolic Reg-ulator in Sepsis

Project description:Sepsis-induced liver dysfunction is a frequent event and is strongly associated with mortality. Establishing a causative link between protein post-translational modification (PTM) and diseases is challenging. We studied the relationship among the lysine acetylation (Kac), the sirtuin (SIRTs), and their interactors carefully selected in sepsis-induced liver dysfunction (SILD), per-formed on LPS-stimulated HepG2 cells. Protein hyperacetylation was observed according to SIRTs reduction after LPS treatment for 24 h. We identified 1,449 Kac sites based on comparative acetylome analysis, and quantified 1,086 Kac sites on 410 proteins for acetylation. Interestingly, the up-regulated Kac proteins are enriched in glycolysis/gluconeogenesis pathways in the KEGG category. Among the proteins in the glycolysis pathway, hyperacetylation, a key regulator of lactate level in sepsis, was observed in three pyruvate kinase M2 (PKM2) sites. Hyperacetylation of PKM2 induced an increase in its activity, increasing the lactate concentration as a result. In conclusion, this study is the first to conduct global profiling of Kac, suggesting the Kac mecha-nism of PKM2 in glycolysis of sepsis. Moreover, it helps further understand the systematical in-formation of hyperacetylation during the sepsis process.

2024-01-30 | PXD027496 | Pride