Protocol to quantify polyphosphate in human cell lines using a tagged PPBD peptide

Polyphosphate (polyP) is an evolutionarily conserved polymer of phosphates that is difficult to study in human cells because of its low concentration and high lability. First, we described how to express and purify Xpress-tagged PPBD (Ppx1 PolyP Binding Domain). We describe the detection and quantif...

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Detalles Bibliográficos
Autores principales: Jiménez, Javier, Lázaro, Blanca, Sarrias, Ana, Tadeo, Francisco J., Pérez-Montero, Marta, Clotet, Josep, Bru, Samuel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Protocol
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9079103/
https://www.ncbi.nlm.nih.gov/pubmed/35542178
http://dx.doi.org/10.1016/j.xpro.2022.101363
Descripción
Sumario:Polyphosphate (polyP) is an evolutionarily conserved polymer of phosphates that is difficult to study in human cells because of its low concentration and high lability. First, we described how to express and purify Xpress-tagged PPBD (Ppx1 PolyP Binding Domain). We describe the detection and quantification of nuclear polyP in HEK293T cells using Xpress-PPBD, Xpress antibody, and Alexa-conjugated secondary antibodies. We have also used this protocol in SH-SY5Y HeLa and HEK293 cells. For complete details on the use and execution of this protocol, please refer to Samper-Martín et al. (2021).

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