Ppp Interactors
Ppp Interactors - Related Videos
10:17
A Mass Spectrometry-Based Approach to Identify Phosphoprotein Phosphatases and their Interactors
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2022
Here, we present a protocol for the enrichment of endogenous phosphoprotein phosphatases and their interacting proteins from cells and tissues and their identification and quantification by mass spectrometry-based proteomics.
05:44
Utilization of Grafix for the Detection of Transient Interactors of Saccharomyces cerevisiae Spliceosome Subcomplexes
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Cited by 1 •
2020
Here, we describe the utilization of Grafix (Gradient Fixation), a glycerol gradient centrifugation in the presence of a crosslinker, to identify interactions between splicing factors that bind transiently to the spliceosome complex.
10:05
Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle
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Cited by 1 •
2019
We present experimental approaches for studying RNA-interactors of double-stranded RNA binding protein kinase RNA-activated (PKR) during the mammalian cell cycle using HeLa cells. This method utilizes formaldehyde to crosslink RNA-PKR complexes and immunoprecipitation to enrich PKR-bound RNAs. These RNAs can be further analyzed through high-throughput sequencing or qRT-PCR.
09:39
Techniques for the Analysis of Extracellular Vesicles Using Flow Cytometry
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Cited by 31 •
2015
Many different methods exist for the measurement of extracellular vesicles (EVs) using flow cytometry (FCM). Several aspects should be considered when determining the most appropriate method to use. Two protocols for measuring EVs are presented, using either individual detection or a bead-based approach.
06:36
PRP as a New Approach to Prevent Infection: Preparation and In vitro Antimicrobial Properties of PRP
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Cited by 35 •
2013
Implant-associated infection is a significant clinical complication. This study describes an approach using platelet-rich plasma (PRP) to prevent implant-associated infections, presents the protocol for preparing PRP with constant platelet concentration, and reports the newly identified antimicrobial properties of PRP and related protocols for examining such antimicrobial properties in vitro.
FAQs
Selectivity emerges when different interactor types control different parts of the phosphatase system. Regulatory subunits can influence catalytic behavior, scaffolding proteins can organize molecular assemblies, and substrates can participate in target recognition. Together, these relationships help a PPP catalytic subunit act on appropriate proteins rather than producing indistinguishable effects throughout the cell.
Localization determines which signaling components occupy the same cellular environment. An interactor can help position a PPP catalytic subunit near particular targets, making access to those proteins more likely and limiting activity elsewhere. This spatial organization provides a biochemical explanation for how broadly active phosphatases can produce pathway-specific effects within different cellular regions.
Cellular conditions can influence how interactor relationships regulate phosphatase behavior. Changes in those relationships may affect catalytic control, subcellular positioning, or proximity to target proteins. Examining these condition-dependent effects helps explain how phosphorylation control adapts to changing cellular states and why the same PPP family member may participate in different signaling outcomes.
The catalytic subunit supplies the enzymatic activity that removes phosphate groups, whereas interactors help determine how, where, or toward which targets that activity is used. This division of roles separates chemical catalysis from regulation and organization. Studying both components is therefore necessary to connect phosphatase activity with specific signaling responses.
Interaction maps are used to organize relationships among PPP catalytic subunits, regulatory proteins, scaffolds, and substrates. Biochemical assays then provide experimental support for these relationships and their functional relevance. Used together, these approaches move analysis beyond a list of binding partners toward a clearer view of phosphatase regulation and target selection.
A PPP interaction map can show how catalytic subunits connect with regulatory components, scaffolds, and potential substrates across phosphorylation networks. These connections help researchers examine pathway organization, substrate selectivity, and relationships among signaling processes. The resulting network view can clarify how phosphatase activity contributes to broader signal transduction rather than acting as an isolated reaction.
Disrupted phosphorylation control is associated with disease-linked signaling changes, making PPP interactor relationships useful research targets. Mapping these relationships can identify regulatory or organizational features that influence phosphatase behavior. Such information supports investigation of selective therapeutic intervention, particularly when altering a specific interaction may be more targeted than broadly changing phosphatase activity.