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-Structure paper
| タイトル | Structural insights into the roles of PARP4 and NAD binding in the human vault cage. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 6724, Year 2025 |
| 掲載日 | 2025年7月21日 |
著者 | Jane E Lodwick / Rong Shen / Satchal Erramilli / Yuan Xie / Karolina Roganowicz / Simone Ritchey / Anthony A Kossiakoff / Minglei Zhao / ![]() |
| PubMed 要旨 | Vault is a massive ribonucleoprotein complex found across Eukaryota. The major vault protein (MVP) oligomerizes into an ovular cage, which contains several minor vault components (MVCs) and is ...Vault is a massive ribonucleoprotein complex found across Eukaryota. The major vault protein (MVP) oligomerizes into an ovular cage, which contains several minor vault components (MVCs) and is thought to transport transiently bound "cargo" molecules. Vertebrate vaults house a poly (ADP-ribose) polymerase (known as PARP4 in humans), which is the only MVC with known enzymatic activity. Despite being discovered decades ago, the molecular basis for PARP4's interaction with MVP remains unclear. In this study, we determined the structure of the human vault cage in complex with PARP4 and its enzymatic substrate NAD. The structures reveal atomic-level details of the protein-binding interface, as well as unexpected binding sites for NAD and related nucleotides within the interior of the vault cage. In addition, proteomics data show that human vaults purified from wild-type and PARP4-depleted cells interact with distinct subsets of proteins. Our results thereby support a model in which PARP4's specific incorporation into the vault cage helps to regulate vault's selection of cargo and its subcellular localization. Further, PARP4's proximity to MVP's NAD-binding sites could support its enzymatic function within the vault. |
リンク | Nat Commun / PubMed:40691181 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.7 - 3.49 Å |
| 構造データ | EMDB-44953, PDB-9bw5: ![]() EMDB-44954: Human Vault Cage in complex with NAD+ EMDB-44955, PDB-9bw6: EMDB-44957, PDB-9bw7: ![]() EMDB-44959: Human Vault Cage in the presence of ADP ![]() EMDB-44960: Human Vault Cage in complex with the MINT domain of PARP4 EMDB-48716, PDB-9mxj: |
| 化合物 | ![]() ChemComp-NAD: ![]() ChemComp-APR: |
| 由来 |
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キーワード | PROTEIN TRANSPORT / Vault / Vault Cage / MVP / Major Vault Protein / SPFH / PARP4 / Poly(ADP-ribose)Polymerase 4 / Poly(ADP-ribose)Polymerase / MINT / Ribonucleoprotein / Megadalton complex / TEP1 / vault RNA / Poly(ADP-ribose) Polymerase 4 / NAD+ / NAD / Poly(ADP-ribose) Polymerase |
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