Project description:Using phosphoproteomics and time-lapse fluorescence microscopy, we report that NPCs nuclear pore complexes (NPCs) undergo two distinct modularity events for the nucleoporins Nup60 and Nup2 during budding yeast meiosis: partial and full nuclear basket detachment.
Project description:Using phosphoproteomics, we show that regulated waves of protein phosphorylation affect virtually all cellular functions to supoort meiotic entry, meiotic progeression and gamete morphogenesis.
Project description:Yeast strains (wild type, Naa10 KO and Naa20 KO, resp: wt, natA-delta and natB-delta) were profiled for full proteome analysis by SWATH MS
Project description:Objectives: Osteonecrosis of the jaw (ONJ), a necrotic bone disease unique to the craniofacial region, is often observed among cancer patients treated with bisphosphonate (BP)-based chemotherapy and becomes a costly and debilitating source of pain and reduced quality of life. Elucidation of clinicopathological mechanism and biomarkers of ONJ that can indicate probable disease course would allow for better assessment of treatment strategies for individual patients. To address our overall goal of identifying novel diagnostic and prognostic strategies for ONJ, this study specifically aims to understand the alendronate (ALN) treatment-induced perturbation of bone proteome and microenvironmental pathophysiology of ONJ using targeted molecular analyses and computational approaches based on an in vitro cell culture system. This study also focuses on identifying proteome perturbation and potential molecular biomarkers during ONJ development. Methods: To understand the molecular mechanisms underlying ONJ, an unbiased and global proteomics approach combined with big data analysis using bioinformatics was applied. Biochemical and functional analyses were followed to tease out the mechanisms regulated by ALN treatment. Results: The current findings from our global proteomics study and biochemical analyses suggested that the RIPK3/Wnt/GSK3/β-catenin signaling pathway is significantly perturbed upon alendronate treatment, resulting in abnormal angiogenesis/inflammation/bone anabolism/remodeling/bone mineralization in the in vitro cell culture system. Conclusion: This investigation on potential key signaling mechanisms underlying ONJ will provide a rational basis for suppressing BP-induced ONJ and novel therapeutic strategies against ONJ.
Project description:Many of the world’s most devastating crop diseases are caused by fungal pathogens which elaborate specialized infection structures to invade plant tissue. Here we present a quantitative mass spectrometry-based phosphoproteomic analysis of infection-related development by the rice blast fungus Magnaporthe oryzae, which threatens global food security. We mapped 8,005 phosphosites on 2,062 fungal proteins, revealing major re-wiring of phosphorylation-based signaling cascades during fungal infection. Comparingme phosphosite conservation across 41 fungal species reveals phosphorylation signatures specifically associated with biotrophic and hemibiotrophic fungal infection. We then used parallel reaction monitoring to identify phosphoproteins directly regulated by the Pmk1 MAP kinase that controls plant infection by M. oryzae. We define 33 substrates of Pmk1 and show that Pmk1-dependent phosphorylation of a newly identified regulator, Vts1, is required for rice blast disease. Defining the phosphorylation landscape of infection therefore identifies potential therapeutic interventions for control of plant diseases.
Project description:Time resolved phosphorylation changes were measured the melanoma cell lines A2058 and UACC257. An endothelin B receptor knockout of UACC257 was processed in parallel. Protein abundance was also compared at the latest time point of the study (90 min) using DIA-SWATH
Project description:ArrayCGH profiling and examination of IgH disruption by FISH on two myeloma B-cell lineage subpopulations: CD138+ and CD19+ to confirm existence of abnormal bone marrow B-cell subset contaning genetic background for primary oncogenic events.
Project description:Seasonal influenza outbreaks and recurrent influenza pandemics present major challenges to public health. By studying immunological responses to influenza in different host species, it may be possible to discover common mechanisms of susceptibility in response to various influenza strains. This could lead to novel therapeutic targets with wide clinical application. Using a mouse-adapted strain of influenza (A/HK/1/68-MA20 [H3N2]), we produced a mouse model of severe influenza (p-flu) that reproduces the hallmark high viral load and overexpression of cytokines associated with susceptibility to p-flu in humans. We mapped genetic determinants of the host response using a panel of 29 closely related mouse strains (AcB/BcA panel of recombinant congenic strains) created from influenza-susceptible A/J and influenza-resistant C57BL/6J (B6) mice. Combined clinical quantitative trait loci (cQTL) and lung expression QTL (eQTL) mapping identified candidate genes for two sex-specific QTLs on chromosomes 2 and 17. The former includes the previously described Hc gene, a deficit of which is associated with the susceptibility phenotype in females. The latter includes the phospholipase gene Pla2g7 and Tnfrsf21, a member of the tumor necrosis factor receptor superfamily. Confirmation of the gene underlying the chromosome 17 QTL may reveal new strategies for influenza treatment. To identify eQTLs, we reanalyzed lung expression data previously obtained by Lee et al (2006) on MGU74Av2 microarrays (Affymetrix) for 54 mice (13BcA, 12AcB, B6 and A/J mice in duplicate) using Custom CDFv12 to reorganize oligonucleotide probes based on the latest genome and transcriptome information. We inferred an A/J or B6 strain of origin for each gene based on the genotype of surrounding markers with a call rate of 96.7%. If a gene was in between A/J and B6 markers for a given RCS, it was coded as NA. Expression values were normalized using the Robust Multi-array Analysis (RMA) for Affymetrix gene chips. To define the association between differentially expressed genes and genotypes, ANOVA was conducted on a per-gene basis using the linear model Expression ~ DSO + BG + DSO*BG, where background (BG) and donor strain of origin (DSO) were coded as binary phenotypes corresponding to A/J or B6. The cutoff for genome-wide significance was computed using the BenjaminiM-bM-^@M-^SHochberg correction. For reference, the paper by Lee (2006): http://www.ncbi.nlm.nih.gov/pubmed/16449383
Project description:p38 and JNK are activated in response to acute stress and inflammatory signals. Through modification of a plethora of substrates, these kinases profoundly re-shape cellular physiology for the optimal response to a harmful environment and/or an inflammatory state. Here, we utilized phospho-proteomics to identify several hundred substrates for both kinases. Our results indicate that the scale of signaling from p38 and JNK are of a similar magnitude. Among the many new targets, we highlight the regulation of the transcriptional regulators GIGYF1 and 2 by p38-dependent MK2 phosphorylation and 14-3-3 binding. We also show that the Golgi apparatus contains numerous substrates, and is a major target for regulation by p38 and JNK. When activated, these kinases mediate structural rearrangement of the Golgi apparatus which positively affects protein flux through the secretory system. Our work expands on our knowledge about p38 and JNK signaling with important biological ramifications.
Project description:A SWATH-based worflow has been developed for C. elegans proteome profiling, including sample preparation, SWATH spectral library generation and downstream data treatment. The influences of several RNAi treatments (including mrps5, fzo1, drp1, eat3) on C. elegans total proteome were studied.