Temporal profiling of redox-dependent heterogeneity in single cells

Meytal Radzinski, Rosi Fassler, Ohad Yogev, William Breuer, Nadav Shai, Jenia Gutin, Sidra Ilyas, Yifat Geffen, Sabina Tsytkin-Kirschenzweig, Yaakov Nahmias, Tommer Ravid, Nir Friedman, Maya Schuldiner, Dana Reichmann*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Cellular redox status affects diverse cellular functions, including proliferation, protein homeostasis, and aging. Thus, individual differences in redox status can give rise to distinct subpopulations even among cells with identical genetic backgrounds. Here, we have created a novel methodology to track redox status at single cell resolution using the redox-sensitive probe Grx1-roGFP2. Our method allows identification and sorting of sub-populations with different oxidation levels in either the cytosol, mitochondria or peroxisomes. Using this approach, we defined a redox-dependent heterogeneity of yeast cells and characterized growth, as well as proteomic and transcriptomic profiles of distinctive redox subpopulations. We report that, starting in late logarithmic growth, cells of the same age have a bi-modal distribution of oxidation status. A comparative proteomic analysis between these populations identified three key proteins, Hsp30, Dhh1, and Pnc1, which affect basal oxidation levels and may serve as first line of defense proteins in redox homeostasis.

Original languageAmerican English
Article numbere37623
JournaleLife
Volume7
DOIs
StatePublished - 5 Jun 2018

Bibliographical note

Publisher Copyright:
© Radzinski et al.

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