This family represents a conserved region of approximately 60 residues in length within nucleolar GTP-binding protein 1 (NOG1). In S. cerevisiae, the NOG1 gene has been shown to be essential for cell viability, suggesting that NOG1 may play an important role in nucleolar functions [1]. Family members include eukaryotic, bacterial and archaeal proteins.

1: A novel nucleolar G-protein conserved in eukaryotes. Park JH, Jensen BC, Kifer CT, Parsons M; J Cell Sci 2001;114:173-185. PMID:11112701