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A novel nucleolar GTP-binding protein, circularly permuted subfamily of the Ras GTPases. Autoantigen NGP-1 (Nucleolar G-protein gene 1) has been shown to localize in the nucleolus and nucleolar organizers in all cell types analyzed, which is indicative of a function in ribosomal assembly. NGP-1 and its homologs show a circular permutation of the GTPase signature motifs so that the C-terminal strands 5, 6, and 7 (strand 6 contains the G4 box with NKXD motif) are relocated to the N terminus. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",