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-Structure paper
| タイトル | Mechanistic insights into single-stranded DNA degradation by lysosomal exonucleases PLD3 and PLD4 from structural snapshots. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 11431, Year 2025 |
| 掲載日 | 2025年12月11日 |
著者 | Yoshinori Hirano / Wakiko Ezaki / Ryota Sato / Umeharu Ohto / Kensuke Miyake / Toshiyuki Shimizu / ![]() |
| PubMed 要旨 | Lysosomal exonuclease phospholipase D (PLD) family PLD3 and PLD4 degrade single-stranded RNA or DNA and regulate TLR7 or TLR9 responses. Polymorphisms of these enzymes are associated with human ...Lysosomal exonuclease phospholipase D (PLD) family PLD3 and PLD4 degrade single-stranded RNA or DNA and regulate TLR7 or TLR9 responses. Polymorphisms of these enzymes are associated with human diseases: PLD4 is associated with inflammatory diseases, and PLD3 is associated with neurodegenerative diseases. Here, we determine the structures of substrate-bound PLD3 and PLD4 by cryo-electron microscopy. Our structures reveal that PLD3 rebuilds a substrate-binding pocket, depending on the substrate, mainly via motion of the Phe335-containing loop. Furthermore, we captured the structure in a metastable state that appears during substrate rearrangement following product release. Together, our findings identify the residues that underlie the distinct activities of PLD3 and PLD4. This study provides a mechanistic basis for the exonuclease activity of PLD3 and PLD4 in single-stranded DNA degradation. |
リンク | Nat Commun / PubMed:41381514 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.85 - 3.31 Å |
| 構造データ | EMDB-64921, PDB-9vbg: EMDB-64922, PDB-9vbh: EMDB-64923, PDB-9vbi: EMDB-64924, PDB-9vbj: EMDB-64925, PDB-9vbk: |
| 化合物 | ![]() ChemComp-NAG: ![]() ChemComp-T3P: |
| 由来 |
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キーワード | IMMUNE SYSTEM / Exonuclease |
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