GLTSCR2/PICT1 links mitochondrial stress and Myc signaling

John Yoon, Alvin J.Y. Ling, Meltem Isik, Dong Young Donna Lee, Michael J. Steinbaugh, Laura M. Sack, Abigail N. Boduch, T. Keith Blackwell, David A. Sinclair, Stephen J. Elledge

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Mitochondrial defects underlie a multitude of human diseases. Genetic manipulation of mitochondrial regulatory pathways represents a potential therapeutic approach. We have carried out a highthroughput overexpression screen for genes that affect mitochondrial abundance or activity using flow-cytometry-based enrichment of a cell population expressing a high-complexity, concentrationnormalized pool of human ORFs. The screen identified 94 candidate mitochondrial regulators including the nuclear protein GLTSCR2, also known as PICT1. GLTSCR2 enhances mitochondrial function and is required for the maintenance of oxygen consumption, consistent with a pivotal role in the control of cellular respiration. RNAi inactivation of the Caenorhabditis elegans ortholog of GLTSCR2 reduces respiration in worms, indicating functional conservation across species. GLTSCR2 controls cellular proliferation and metabolism via the transcription factor Myc, and is induced by mitochondrial stress, suggesting it may constitute a significant component of the mitochondrial signaling pathway.

Original languageEnglish (US)
Pages (from-to)3781-3786
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number10
StatePublished - Mar 11 2014
Externally publishedYes

ASJC Scopus subject areas

  • General


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