G-rich sequence factor 1 (GRSF1) is a regulator of post-transcriptional mitochondrial gene expression. The protein encoded by this gene is a cellular protein that binds RNAs containing the G-rich element. The protein is localized in the cytoplasm, and has been shown to stimulate translation of viral mRNAs in vitro. Multiple transcript variants encoding different isoforms have been found for this gene.
