8Q7Q

Structure of the recycling U5 snRNP bound to chaperones CD2BP2 and TSSC4 (State 2)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Structural basis of human U5 snRNP late biogenesis and recycling.

Riabov Bassat, D., Visanpattanasin, S., Vorlander, M.K., Fin, L., Phillips, A.W., Plaschka, C.

(2024) Nat Struct Mol Biol 31: 747-751

  • DOI: https://doi.org/10.1038/s41594-024-01243-4
  • Primary Citation of Related Structures:  
    8Q7Q, 8Q7V, 8Q7W, 8Q7X

  • PubMed Abstract: 

    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.

    • Organizational Affiliation: 

    Research Institute of Molecular Pathology, Vienna BioCenter, Vienna, Austria.


Macromolecules

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Pre-mRNA-processing-splicing factor 8B [auth A]2,335Homo sapiensMutation(s): 0 
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Find proteins for Q6P2Q9 (Homo sapiens)
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PHAROS:  Q6P2Q9
GTEx:  ENSG00000174231 
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UniProt GroupQ6P2Q9
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
U5 small nuclear ribonucleoprotein 200 kDa helicaseC [auth B]2,136Homo sapiensMutation(s): 0 
EC: 3.6.4.13
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GTEx:  ENSG00000144028 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
116 kDa U5 small nuclear ribonucleoprotein componentD [auth C]972Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000108883 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
U5 small nuclear ribonucleoprotein 40 kDa proteinE [auth D]357Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000060688 
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UniProt GroupQ96DI7
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Pre-mRNA-processing factor 6941Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000101161 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
CD2 antigen cytoplasmic tail-binding protein 2343Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000169217 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
Protein TSSC4329Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000184281 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein Sm D1I [auth a]119Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000167088 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein-associated proteins B and B'J [auth b]240Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000125835 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein Sm D2K [auth c]118Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000125743 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein Sm D3L [auth d]126Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000100028 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein EM [auth e]92Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000182004 
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein FN [auth f]86Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000139343 
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
Small nuclear ribonucleoprotein GO [auth g]76Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000143977 
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Entity ID: 1
MoleculeChains LengthOrganismImage
U5 snRNAA [auth 5]117Homo sapiens
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European Research Council (ERC)European UnionERC- 2020-STG 949081
H2020 Marie Curie Actions of the European CommissionEuropean Union101028744

Revision History  (Full details and data files)

  • Version 1.0: 2024-04-17
    Type: Initial release
  • Version 1.1: 2024-05-29
    Changes: Database references