7YW4
Crystal structure of tRNA 2'-phosphotransferase from Saccharomyces cerevisiae
Summary for 7YW4
| Entry DOI | 10.2210/pdb7yw4/pdb |
| Descriptor | tRNA 2'-phosphotransferase, NICOTINAMIDE-ADENINE-DINUCLEOTIDE, D(-)-TARTARIC ACID, ... (4 entities in total) |
| Functional Keywords | trna 2'-phosphotransferase, transferase |
| Biological source | Saccharomyces cerevisiae (baker's yeast) |
| Total number of polymer chains | 1 |
| Total formula weight | 27054.00 |
| Authors | Yang, X.Y.,Liu, X.H. (deposition date: 2022-08-21, release date: 2023-07-26, Last modification date: 2023-08-30) |
| Primary citation | Yang, X.,Wang, J.,Li, S.,Li, X.,Gong, J.,Yan, Z.,Zhou, H.,Wu, C.,Liu, X. Structural and biochemical insights into the molecular mechanism of TRPT1 for nucleic acid ADP-ribosylation. Nucleic Acids Res., 51:7649-7665, 2023 Cited by PubMed Abstract: Nucleic acid ADP-ribosylation has been established as a novel modification found in a wide diversity of prokaryotic and eukaryotic organisms. tRNA 2'-phosphotransferase 1 (TRPT1/TPT1/KptA) possesses ADP-ribosyltransferase (ART) activity and is able to ADP-ribosylate nucleic acids. However, the underlying molecular mechanism remains elusive. Here, we determined crystal structures of TRPT1s in complex with NAD+ from Homo sapiens, Mus musculus and Saccharomyces cerevisiae. Our results revealed that the eukaryotic TRPT1s adopt common mechanisms for both NAD+ and nucleic acid substrate binding. The conserved SGR motif induces a significant conformational change in the donor loop upon NAD+ binding to facilitate the catalytic reaction of ART. Moreover, the nucleic acid-binding residue redundancy provides structural flexibility to accommodate different nucleic acid substrates. Mutational assays revealed that TRPT1s employ different catalytic and nucleic acid-binding residues to perform nucleic acid ADP-ribosylation and RNA 2'-phosphotransferase activities. Finally, cellular assays revealed that the mammalian TRPT1 is able to promote endocervical HeLa cell survival and proliferation. Together, our results provide structural and biochemical insights into the molecular mechanism of TRPT1 for nucleic acid ADP-ribosylation. PubMed: 37334830DOI: 10.1093/nar/gkad525 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.18 Å) |
Structure validation
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