RGS6 (regulator of G protein signaling 6) is a multifunctional protein that regulates both G protein-dependent and -independent cellular processes. As a member of the R7 RGS subfamily, RGS6 contains unique DEP and GGL domains alongside the conserved RGS domain 1. Its primary function involves negatively regulating G protein-coupled receptor signaling by enhancing GTPase activity of Gαi/o subunits, thereby promoting their conversion to the inactive GDP-bound state 2. RGS6 exhibits extraordinary structural complexity, with 36 distinct splice variants arising from alternative splicing and transcription sites, producing proteins with variable N-terminal domains, complete or incomplete GGL domains, and multiple C-terminal variants 13. Beyond G protein regulation, RGS6 demonstrates G protein-independent functions including interaction with SCG10 to promote neuronal differentiation 4, binding to DMAP1 and DNMT1 to inhibit transcriptional repression 5, and nucleolar localization where it suppresses Nucleolin/miRNA-21 signaling leading to cardiomyocyte death under stress conditions 6. RGS6 shows clinical relevance in neuropsychiatric disorders, with genetic variants associated with stress-induced obesity 7, and functions as a tumor suppressor while mediating chemotherapy-induced cardiotoxicity 82. The protein displays tissue-specific expression patterns with brain-specific phosphorylated isoforms identified 3.