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-Structure paper
| タイトル | Structure of the human systemic RNAi defective transmembrane protein 1 (hSIDT1) reveals the conformational flexibility of its lipid binding domain. |
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| ジャーナル・号・ページ | Life Sci Alliance, Vol. 7, Issue 9, Year 2024 |
| 掲載日 | 2024年6月26日 |
著者 | Vikas Navratna / Arvind Kumar / Jaimin K Rana / Shyamal Mosalaganti / ![]() |
| PubMed 要旨 | In , inter-cellular transport of the small non-coding RNA causing systemic RNAi is mediated by the transmembrane protein SID1, encoded by the gene in the systemic RNAi defective () loci. SID1 shares ...In , inter-cellular transport of the small non-coding RNA causing systemic RNAi is mediated by the transmembrane protein SID1, encoded by the gene in the systemic RNAi defective () loci. SID1 shares structural and sequence similarity with cholesterol uptake protein 1 (CHUP1) and is classified as a member of the ChUP family. Although systemic RNAi is not an evolutionarily conserved process, the gene products are found across the animal kingdom, suggesting the existence of other novel gene regulatory mechanisms mediated by small non-coding RNAs. Human homologs of gene products-hSIDT1 and hSIDT2-mediate contact-dependent lipophilic small non-coding dsRNA transport. Here, we report the structure of recombinant human SIDT1. We find that the extra-cytosolic domain of hSIDT1 adopts a double jelly roll fold, and the transmembrane domain exists as two modules-a flexible lipid binding domain and a rigid transmembrane domain core. Our structural analyses provide insights into the inherent conformational dynamics within the lipid binding domain in ChUP family members. |
リンク | Life Sci Alliance / PubMed:38925866 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.5 Å |
| 構造データ | EMDB-42943, PDB-8v38: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / RNA interference / transmembrane protein / cholesterol or dsRNA uptake family. |
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homo sapiens (ヒト)
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