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Kv2.1 IP dataset On_BeadMK8_2018

ABSTRACT: This project aimed to identify proteins copurifying with the Kv2.1 potassium channel from lysates prepared from crosslinked mouse brain homogenates. Comparison samples were prepared from Kv2.1 knockout mouse brains. Parallel immunopurifications were perfofmed for the unrelated Kv1.2 potassium channel.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Brain

SUBMITTER: James Trimmer

LAB HEAD: James S.

PROVIDER: PXD044574 | Pride | 2023-08-30

REPOSITORIES: Pride

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			Action	DRS
	GPM22200017987.mzid.gz	Mzid
	GPM22200017987.mzid_GPM22200017987.MGF	Mzid
	GPM22200017988.mzid.gz	Mzid
	GPM22200017988.mzid_GPM22200017988.MGF	Mzid
	GPM22200017989.mzid.gz	Mzid

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1 - 5 of 37

Publications

Neuronal ER-plasma membrane junctions couple excitation to Ca<sup>2+</sup>-activated PKA signaling.

Vierra Nicholas C NC Ribeiro-Silva Luisa L Kirmiz Michael M van der List Deborah D Bhandari Pradeep P Mack Olivia A OA Carroll James J Le Monnier Elodie E Aicher Sue A SA Shigemoto Ryuichi R Trimmer James S JS

Nature communications 20230826 1

Junctions between the endoplasmic reticulum (ER) and the plasma membrane (PM) are specialized membrane contacts ubiquitous in eukaryotic cells. Concentration of intracellular signaling machinery near ER-PM junctions allows these domains to serve critical roles in lipid and Ca<sup>2+</sup> signaling and homeostasis. Subcellular compartmentalization of protein kinase A (PKA) signaling also regulates essential cellular functions, however, no specific association between PKA and ER-PM junctional dom ...[more]

PMID: 37633939

Publication: 1/3

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Mechanism of pharmacochaperoning in ATP-sensitive potassium channels revealed by cryo-EM

Project description:ATP-sensitive potassium (K-ATP) channels composed of a pore-forming Kir6.2 potassium channel and a regulatory ABC transporter sulfonylurea receptor 1 (SUR1) regulate insulin secretion in pancreatic beta-cells to maintain glucose homeostasis. Mutations that impair channel folding or assembly prevent cell surface expression and cause congenital hyperinsulinism. Structurally diverse K-ATP inhibitors have been shown to act as pharmacochaperones to correct mutant channel expression, but the mechanism is unknown. Here, we compare cryoEM structures of K-ATP channels bound to pharmacochaperones glibenclamide, repaglinide, and carbamazepine. DSP cross-linking mass spectrometry was used to partially confirm cryoEM structures.

2019-11-12 | PXD013873 | Pride

Transcription profiling of P.aeruginosa PA14 and P.aeruginosa PA14 metR::phoA grown on swarming plates

Project description:Four biological repeats of P.aeruginosa PA14 and four biological repeats of P.aeruginosa PA14 metR::phoA were grown in BM2 swarming media plates containing 62mM potassium phosphate buffer [pH7], 2 mM MgSO4, 10uM FeSO4, 0.4% (wt/vol) glucose, 0.1% (wt/vol) casamino acids and 0.5% agar. Microarray experiments were done using microarray slides and protocols from TIGR on samples harvested from the dendritic swarm colony growth, 2 to 3 mm of the swarm zone edge.

2009-08-20 | E-FPMI-20 | biostudies-arrayexpress

scRNA-seq and snucRNA-seq of human primary trophoblast organoids (PTO) and trophoblast stem cells (TSCs) differentiation into extravillous trophoblast organoids (EVTs)

Project description:This study aims to compare in vivo human trophoblast differentiation into EVTs to different in vitro trophoblast organoids using single-cell and single-nuclei RNA sequencing. The study includes two type of systems: human primary trophoblast organoids (PTO) and trophoblast stem cells (TSCs). Trophoblast stem cell (TSC) lines BTS5 and BTS11 derived by Okae and colleagues were grown as described previously (Okae et al. 2018) and together with EVT media. Primary trophoblast organoids (PTO) were grown and differentiated into EVT as previously described by Turco & Sheridan (Turco et al 2018; Sheridan et al 2020). This study shows that the main regulatory programs mediating EVT invasion in vivo are preserved in in vitro models of EVT differentiation from primary trophoblast organoids and trophoblast stem cells.

2023-02-09 | E-MTAB-12650 | biostudies-arrayexpress

Transcription profiling of P.aeruginosa PA14 and P.aeruginosa PA14 metR::phoA

Project description:Five biological repeats of P.aeruginosa PA14 and five biological repeats of P.aeruginosa PA14 metR::phoA were grown in liquid BM2 swarming media containing 62mM potassium phosphate buffer [pH7], 2 mM MgSO4, 10uM FeSO4, 0.4% (wt/vol) glucose, and 0.1% (wt/vol) casamino acids. Microarray experiments were done using microarray slides and protocols from TIGR on samples taken from mid-log phase (OD600 0.4-0.5)cells.

2009-08-20 | E-FPMI-19 | biostudies-arrayexpress

T he proteostasis interactomes of trafficking - deficient K V 11.1 variants associated with Long QT Syndrome and pharmacological chaperone rescue

Project description:The voltage gated potassium ion channel KV11.1 plays a critical role in cardiac repolarization. Genetic variants that render Kv11.1 dysfunctional cause Long QT Syndrome (LQTS), which is associated with fatal arrhythmias. Approximately 90% of LQTS-associated variants cause intracellular protein transport (trafficking) dysfunction, which can be rescued by pharmacological chaperones like E-4031. Protein folding and trafficking decisions are regulated by chaperones, protein quality control factors, and trafficking machinery comprising the cellular proteostasis network. Here, we test whether trafficking dysfunction is associated with alterations in the proteostasis network of pathogenic Kv11.1 variants, and whether pharmacological chaperones can normalize the proteostasis network of responsive variants.

2024-08-10 | PXD050914 | Pride

KCa3.1 depletion effect on hepatocellular carcinoma cell line Huh7

Project description:Analysis of Huh7 hepatocellular carcinoma (HCC) cells depleted for potassium channel KCa3.1, the intermediate conductance calcium-activated potassium channel. Result provide insight into the role of KCa3.1 in the carcinogenesis of HCC. We used microarrays to detail the gene expression differences between KCa3.1 knockdown and negative control in Huh7 HCC cells.

2018-06-23 | GSE116183 | GEO

N-methyl-D-aspartate receptors mediate activity-dependent down-regulation of potassium channel genes during the expression of homeostatic intrinsic plasticity

Project description:Using whole-cell patch clamp recording and unbiased gene expression profiling in rat dissociated hippocampal neurons cultured at high density, we demonstrate here that chronic activity blockade induced by the sodium channel blocker tetrodotoxin leads to a homeostatic increase in action potential firing and down-regulation of potassium channel genes. In addition, chronic activity blockade reduces total potassium current, as well as protein expression and current of voltage-gated Kv1 and Kv7 potassium channels, which are critical regulators of action potential firing. Importantly, inhibition of N-Methyl-D-Aspartate receptors alone mimics the effects of tetrodotoxin, including the elevation in firing frequency and reduction of potassium channel gene expression and current driven by activity blockade, whereas inhibition of L-type voltage-gated calcium channels has no effect.

2017-09-21 | GSE104052 | GEO

Mechanism of pharmacochaperoning in ATP-sensitive potassium channels revealed by cryo-EM

Project description:ATP-sensitive potassium (K-ATP) channels composed of a pore-forming Kir6.2 potassium channel and a regulatory ABC transporter sulfonylurea receptor 1 (SUR1) regulate insulin secretion in pancreatic beta-cells to maintain glucose homeostasis. Mutations that impair channel folding or assembly prevent cell surface expression and cause congenital hyperinsulinism. Structurally diverse K-ATP inhibitors have been shown to act as pharmacochaperones to correct mutant channel expression, but the mechanism is unknown. Here, we compare cryoEM structures of K-ATP channels bound to pharmacochaperones glibenclamide, repaglinide, and carbamazepine. CyanurBiotinDimercaptoPropionylSuccinimide (CBDPS) cross-linking mass spectrometry was used to partially confirm cryoEM structures.

2019-08-12 | PXD014498 | Pride

Comparison of normal and KCNQ3 overexpressing HEK293T cells

Project description:KCNQ3 (KQT-like potassium channel member 3) was overexpressed in HEK293T cells and compared to control

2022-06-01 | GSE152673 | GEO

Global gene expression of Ruegeria pomeroyi DSS-3 during ammonium-limited, ribose phosphate-, methylphosphonate-, or potassium phosphate-excess growth regimes or during potassium phosphate-limited, ammonium-excess regime

Project description:We used the previously designed oligonucleotide microarrays (BM-CM-<rgmann et al., 2007, Environmental Microbiology, 9: 2742-2755) to detect the mRNA transcripts of R. pomeroyi DSS-3 when the cells were cultured under steady-state conditions limited with ammonium (NH4Cl, 0.26 mM) but with an excess of D-ribose-5-phosphate (C5H9Na2O8P*2H2O, 0.5 mM), methylphosphonic acid (CH5PO3, 0.5 mM), or potassium phosphate (KH2PO4, 0.5 mM), or during ammonium excess (NH4Cl, 2.8 mM) but were limited with potassium phosphate (KH2PO4, 9.2 M-NM-<M). A total of 13 microarray hybridizations were performed: three biological replicates each from ribose phosphate, methylphosphonate, or potassium phosphate excess growth regimes, three biological replicates from potassium phosphate limited growth regime, and one technical replicate for the potassium phosphate excess growth regime. Data for the technical replicates were averaged and combined, resulted in a total of 12 samples.

2014-06-02 | E-GEOD-38740 | biostudies-arrayexpress

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