• Nanion Technologies: Smart Tools for Ion Channel Research

    Nanion Technologies: Smart Tools for Ion Channel Research

  • SyncroPatch 384i: HTS Automated Patch Clamp

    SyncroPatch 384i: HTS Automated Patch Clamp

  • SURFE²R 96SE: Label-free HTS Transporter Screening

    SURFE²R 96SE: Label-free HTS Transporter Screening

  • Dynamic Clamp: Patchliner

    Dynamic Clamp: Patchliner

  • Bilayer recordings: Orbit product family

    Bilayer recordings: Orbit product family

  • CardioExcyte 96 SOL: Pacing Cardiomyocytes with Light

    CardioExcyte 96 SOL: Pacing Cardiomyocytes with Light

Our Product Portfolio

SyncroPatch 384i

SyncroPatch 384i

Patchliner

Patchliner

Port-a-Patch

Port-a-Patch

Port-a-Patch mini

Port-a-Patch mini

CardioExcyte 96

CardioExcyte 96

FLEXcyte 96

FLEXcyte 96

SURFE²R 96SE

SURFE²R 96SE

SURFE²R N1

SURFE²R N1

Orbit 16

Orbit 16

Orbit Mini

Orbit Mini

Vesicle Prep Pro

Vesicle Prep Pro

2019 - Golgi anti-apoptotic proteins are evolutionarily conserved ion channels that regulate cell death in plants

icon pap   Port-a-Patch and   icon vpp   Vesicle Prep Pro Pre-publication in BioRxiv (2019)

Authors:
Sierla M., Prole D.L., Saraiva N., Carrara G., Dinischiotu N., Vaattovaara A., Wrzaczek M., Taylor C.W., Smith F.L., Feys B.

Pre-publication:
BioRxiv (2019) doi: https://doi.org/10.1101/859678


Highlight:

Arabidopsis Golgi anti-apoptotic proteins (GAAPs) share functional conservation with their human and viral counterparts in cell death regulation and ion channel activity

Abstract:

Programmed cell death regulates developmental and stress responses in eukaryotes. Golgi anti-apoptotic proteins (GAAPs) are evolutionarily conserved cell death regulators. Human and viral GAAPs inhibit apoptosis and modulate intracellular Ca2+ fluxes, and viral GAAPs form cation selective channels. Although most mammalian cell death regulators are not conserved at the sequence level in plants, the GAAP gene family shows expansion, with five paralogues (AtGAAP1-5) in the Arabidopsis genome. We pursued molecular and physiological characterization of AtGAAPs making use of the advanced knowledge of their human and viral counterparts. Structural modeling of AtGAAPs predicted the presence of a channel-like pore, and electrophysiological recordings from purified AtGAAP3 reconstituted into lipid bilayers confirmed that plant GAAPs can function as ion channels. AtGAAP1 and AtGAAP4 localized exclusively to the Golgi within the plant cell, while AtGAAP2, AtGAAP3 and AtGAAP5 also showed tonoplastic localization. Gene expression analysis revealed differential spatial expression and abundance of transcript for AtGAAP paralogues in Arabidopsis tissues. We demonstrate that AtGAAP1-5 inhibit Bax-induced cell death in yeast. However, overexpression of AtGAAP1 induces cell death in Nicotiana benthamiana leaves and lesion mimic phenotype in Arabidopsis. We propose that AtGAAPs function as Golgi-localized ion channels that regulate cell death by affecting ionic homeostasis within the cell.


Download here

Back to Overview

Nanion Corporate Blog

We use cookies on our website. Some of them are essential for the operation of the site, while others help us to improve this site and the user experience (tracking cookies). You can decide for yourself whether you want to allow cookies or not. Please note that if you reject them, you may not be able to use all the functionalities of the site.