Controlling the mitochondrial antisense – role of the SUV3-PNPase complex and its co-factor GRSF1 in mitochondrial RNA surveillance

Abstract

Transcription of the human mitochondrial genome produces a vast amount of non-coding antisense RNAs. These RNA species can form G-quadraplexes (G4), which affect their decay. We found that the mitochondrial degradosome, a complex of RNA helicase SUPV3L1 (best known as SUV3) and the ribonuclease PNPT1 (also known as PNPase), together with G4-melting protein GRSF1, is a key player in restricting antisense mtRNAs.

Keywords

• rna surveillance
• mitochondrial rna
• g-quadraplexes
• g4
• pnpase
• suv3
• grsf1