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-Structure paper
タイトル | Structural basis of human U5 snRNP late biogenesis and recycling. |
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ジャーナル・号・ページ | Nat Struct Mol Biol, Vol. 31, Issue 5, Page 747-751, Year 2024 |
掲載日 | 2024年3月11日 |
著者 | Daria Riabov Bassat / Supapat Visanpattanasin / Matthias K Vorländer / Laura Fin / Alexander W Phillips / Clemens Plaschka / |
PubMed 要旨 | Pre-mRNA splicing by the spliceosome requires the biogenesis and recycling of its small nuclear ribonucleoprotein (snRNP) complexes, which are consumed in each round of splicing. The human U5 snRNP ...Pre-mRNA splicing by the spliceosome requires the biogenesis and recycling of its small nuclear ribonucleoprotein (snRNP) complexes, which are consumed in each round of splicing. The human U5 snRNP is the ~1 MDa 'heart' of the spliceosome and is recycled through an unknown mechanism involving major architectural rearrangements and the dedicated chaperones CD2BP2 and TSSC4. Late steps in U5 snRNP biogenesis similarly involve these chaperones. Here we report cryo-electron microscopy structures of four human U5 snRNP-CD2BP2-TSSC4 complexes, revealing how a series of molecular events primes the U5 snRNP to generate the ~2 MDa U4/U6.U5 tri-snRNP, the largest building block of the spliceosome. |
リンク | Nat Struct Mol Biol / PubMed:38467876 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.6 - 4.6 Å |
構造データ | EMDB-18229: Structure of the recycling U5 snRNP bound to chaperones CD2BP2 and TSSC4 (State 2, Map 2) EMDB-18234: Structure of the recycling U5 snRNP bound to chaperones CD2BP2 and TSSC4 (State 1, Map 1) EMDB-18235: Structure of the recycling U5 snRNP bound to chaperone CD2BP2 (State 3, Map 3) EMDB-18237: Structure of the recycling U5 snRNP bound to chaperone CD2BP2 (State 4, Map 4) EMDB-18238: Structure of the recycling U5 snRNP bound to chaperone CD2BP2 and TSSC4 (Map 5) EMDB-18239: Structure of the recycling U5 snRNP bound to chaperone CD2BP2 and TSSC4 (Map 6) |
化合物 | ChemComp-MG: ChemComp-GTP: |
由来 |
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キーワード | SPLICING / U5 snRNP / CD2BP2 / TSSC4 / spliceosome / Pre-mRNA splicing |