Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Proteome of the polar filament and polar tube of Nosema bombycis

ABSTRACT: The polar filaments and polar tubes of Nosema bombycis were successfully purified by differential centrifugation, and the protein components were identified by proteomic methods, and the functions of these proteins were commented. These results will provide some reference value and significance for future research on the polar tube and infection mechanism of microsporidium.

ORGANISM(S): Nosema Bombycis Cq1

SUBMITTER: Guoqing Pan

PROVIDER: PXD033032 | iProX | Wed Apr 06 00:00:00 BST 2022

REPOSITORIES: iProX

ACCESS DATA

Json Xml

Publications

Proteomic profile of polar filament and polar tube from fungal pathogen microsporidium Nosema bombycis provides new insights into its unique invasion organelle.

Lv Qing Q Zhou Bingqian B Liao Hongjie H He Xiuli X Chen Yuqing Y Pan Guoqing G Long Mengxian M Zhou Zeyang Z

Journal of proteomics 20220518

Microsporidium is a kind of intracellular fungal pathogen that greatly threatens the human health, breeding industry, and food security. All members of microsporidia possess a unique, highly specialized invasion organelle, described as the polar filament. Like "reversing a finger of gloves", the polar filament discharges out of mature spores to transform as the polar tube, and pathogenic sporoplasm is transported to host cell through polar tube to complete infection. During the invasion process, ...[more]

PMID: 35595055

Similar Datasets

Identification and PTPs in Anncaliia algerae

Project description:This project is focused on isolation and characterization of polar tube proteins (PTPs) of Anncaliia algerae using diverse bioinformatic and experimental methodologies - from mass spectrometry to heterologous expression to antibody production and immunolocalization. A novel protein was isolated from A. algerae polar tube extracts named PTP6 which could participates in recognition of host cell receptors as well.Moreover the obtained data on immunolabeling of the polar tubes in the process of extrusion, strongly support one of three hypothetical mechanisms for spore firing, namely the “everting-like-a-glove finger” model. The practical result of this fundamental research is the elaboration of the novel workflow that allows identification and isolation of PTPs in a given microsporidian species wich unites different approaches, such as homology search, sporal protein extractions by thiol-reducing agents, antibody-based approaches, as well as a protocol for purification of extruded polar tubes combined with mass spectrometry to identify new polar tube components.

2023-07-20 | PXD040773 | Pride

A mitogen-activated protein kinase limits the apical formation of phosphatidylinositol 4,5-bisphosphate during polarized cell expansion of pollen tubes

Project description:Mitogen activated protein kinases (MAPKs) and phosphoinositides contribute to establishment and maintenance of polarity in eukaryotic cells. However, interactions between these important signaling pathways are largely unclear. Pollen tubes are an important model for the study of polarized cell expansion, in which PI4P 5-kinases control apical secretion and MAPKs contribute to pollen tube guidance. Here we report on the regulation of the Arabidopsis PI4P 5-kinase, AtPIP5K6, by the MAPK, MPK6. Purified recombinant AtPIP5K6 was phosphorylated in vitro upon incubation with pollen tube extracts. Non-targeted in-gel-kinase assays of pollen tube extracts followed by mass-spectrometry identified MPK6 as a candidate protein kinase upstream of AtPIP5K6. MPK6 interacted with AtPIP5K6 in yeast-two-hybrid tests, and bimolecular fluorescence complementation verified the interaction at the apical plasma membrane of pollen tubes. Recombinant AtPIP5K6 was phosphorylated in vitro by recombinant MPK6, resulting in reduced catalytic activity of AtPIP5K6. Alanine-substitution of phosphorylation sites, T590A and T597A, abrogated phosphorylation of AtPIP5K6 by MPK6 and prevented the in vitro inhibition. A T597D substitution resulted in reduced catalytic activity of the modified AtPIP5K6 protein in vitro. Coexpression of MPK6 with AtPIP5K6 in pollen tubes resulted in attenuation of PI4P 5-kinase-mediated polarity defects in vivo. Reciprocally, AtPIP5K6 effects were enhanced upon concomitant RNAi-inhibition of endogenous tobacco MAPKs. Both effects were absent when a AtPIP5K6 T590A T597A-variant was expressed, which could no longer be phosphorylated. We conclude that MPK6 limits PI4P 5-kinase-dependent polarized secretion to effect pollen tube guidance, revealing a new link between conserved signaling pathways with potential ramifications across eukaryotic kingdoms.

2022-02-22 | PXD006067 | Pride

Expression data of Arabidopsis pollen tube of an AGP6 AGP11 double null mutant

Project description:Arabinogalactan proteins are proteoglycans known to have important roles during cell growth and development, namelly during pollen tube growth. A microarray experiment was performed on agp6 agp11 pollen tubes to search for genetic interactions in the context of pollen tube growth.

2012-10-31 | GSE40861 | GEO

In situ ribosome clustering and ultrastructure reorganization of polar tube proteins in germinated microsporidia polar tube

Project description:During host cell invasion, microsporidia translocate their entire cytoplasmic contents through a thin, hollow superstructure known as the polar tube. To achieve this, the polar tube transitions from a compact spring-like state inside the environmental spore to a long needle-like tube capable of longrange sporoplasm delivery. The unique mechanical properties of the building blocks of the polar tube allow for an explosive transition from compact to extended state and support the rapid cargo translocation process. The molecular and structural factors enabling this ultrafast process and the ultrastructural changes during cargo delivery remain a mystery. Here, we employ light microscopy and in situ cryo-electron tomography to visualize multiple ultrastructural states of the polar tube, allowing us to evaluate the kinetics of its germination and characterize the underlying morphological transitions. We describe a cargo-filled state with a unique ordered arrangement of microsporidian ribosomes, which cluster along the thin tube wall, and an empty post-translocation state with a reduced diameter but a thicker wall. Together with endogenous compositional information from an affinity-purified polar tube, our work provides comprehensive novel data on the infection apparatus of microsporidia and demonstrates that ribosomes are efficiently transported through polar tubes in a spiral-like parallel arrangement.

2024-01-09 | PXD042571 | Pride

Untargeted LC-MS to compare blood collection tube and processing time – HILIC & C18

Project description:Blood was collected from three healthy volunteers in 3 blood collection tubes: serum separator tube SST (serum), EDTA (plasma), and P100 (plasma) and stored at 4 degrees for 0, 0.5, 1, 2, 4, and 24 hours prior to centrifugation. Compounds were extracted using liquid-liquid extraction to obtain a hydrophilic and a hydrophobic fraction and analyzed using liquid chromatography mass spectrometry. Differences among the blood collection tubes and sample processing time were evaluated (ANOVA with Bonferroni FWER ≤ 0.05 and ANOVA with Benjamini Hochberg FDR ≤ 0.1, respectively).

2018-02-26 | ST001099 | MetabolomicsWorkbench

Transcriptomic analyses to estimated poly(A)-tail lengths in paps1-1 mutant pollen tubes

Project description:Polyadenylation of mRNAs is critical for their export from the nucleus, stability and efficient translation. The Arabidopsis thaliana genome encodes three isoforms of canonical nuclear poly(A) polymerase (PAPS) that redundantly polyadenylate the bulk of pre-mRNAs. However, their distinct mutant phenotypes and transcriptome studies have indicated that subsets of pre-mRNAs are preferentially polyadenylated by either PAPS1 or the two very similar PAPS2 and PAPS4 proteins. Such functional specialization raises the possibility of modulating the balance of activities between the isoforms to alter poly(A) lengths of sets of transcripts, providing an additional level of gene-expression control in plants. Here we test this notion by studying the function of PAPS1 in pollen-tube growth and guidance. Pollen tubes growing through female tissue acquire the competence to find ovules efficiently and upregulate PAPS1 expression more strongly than in vitro grown pollen tubes. Using the temperature-sensitive paps1-1 allele we show that PAPS1 activity during pollen-tube growth is required for full acquisition of competence, resulting in inefficient fertilization by paps1-1 mutant pollen tubes. While these mutant pollen tubes germinate and grow at the same rates as wild-type pollen tubes, they are compromised in locating the micropyles of ovules. Transcriptomic analyses indicate that previously identified competence-associated genes are less expressed in paps1-1 mutant than in wild-type pollen tubes. Estimating the poly(A)-tail lengths of transcripts in mutant and wild-type pollen tubes suggests that polyadenylation by PAPS1 is associated with reduced transcript abundance. Our results therefore suggest that PAPS1 upregulation during pollen-tube growth through the style plays a key role in the acquisition of competence and support the notion that plants can modulate the balance of activity between PAPS isoforms to regulate gene expression.

2023-02-21 | GSE207509 | GEO

Transcriptomic analyzes of paps1 pollen tube/style complexes

2023-02-21 | GSE207285 | GEO

Expression data of Arabidopsis pollen tube of an AGP6 AGP11 double null mutant

2012-10-31 | E-GEOD-40861 | biostudies-arrayexpress

Expression data from Arabidopsis pollen and semi in vivo- and in vitro-grown pollen tubes.

Project description:Pollen tubes extend through pistil tissues and are guided to ovules where they release sperm for fertilization. Although pollen tubes can germinate and elongate in a synthetic medium, their trajectory is random and their growth rates are slower compared to growth in pistil tissues. Furthermore, interaction with the pistil renders pollen tubes competent to respond to guidance cues secreted by specialized cells within the ovule. The molecular basis for this potentiation of the pollen tube by the pistil remains uncharacterized. We used a surgical procedure to obtain large quantities of uncontaminated pollen tubes that grew through the pistil and defined their transcriptome by microarray analysis. We also characterized the transcriptome of in vitro-grown pollen tubes (for 0.5hours or 4hours) and dessicated mature pollen in Arabidopsis.

2009-07-28 | GSE17343 | GEO

Jellyfish Nemopilema nomurai nematocyst venom LC-MSMS

Project description:The scyphozoan jellyfish Nemopilema nomurai are common blooming species in China.The venomous characteristics of jellyfish Nemopilema nomurai is largely attributed to their complex and elaborate venom delivery system: the stinging cells, or nematocytes. These specialized cells synthesize and secrete unique intracellular organelles called nematocysts. Nematocysts with heterogeneous sizes and morphologies may contain different toxic components that exert diverse pharmacological and physiological activities such as hemolysis, cytolysis and proteolysis for defense and prey capture. We modified the previous method of nematocyst preparation using density centrifugation to purify undischarged nematocysts from jellyfish Nemopilema nomurai tentacles. Ultimately, isorhiza-type were successfully purified.Then we used purified nematocysts for proteomic study to identify sting-related toxins in Nemopilema nomurai nematocysts.

2018-11-30 | PXD011684 | Pride

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data