8Y6O image
Entry Detail
PDB ID:
8Y6O
EMDB ID:
Keywords:
Title:
Cryo-EM Structure of the human minor pre-B complex (pre-precatalytic spliceosome) U11 and tri-snRNP part
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2024-02-02
Release Date:
2024-03-20
Method Details:
Experimental Method:
Resolution:
3.38 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polyribonucleotide
Description:pre-mRNA
Chain IDs:A
Chain Length:280
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polyribonucleotide
Description:U5 snRNA
Chain IDs:B
Chain Length:119
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Pre-mRNA-processing-splicing factor 8
Chain IDs:C
Chain Length:118
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:116 kDa U5 small nuclear ribonucleoprotein component
Chain IDs:D
Chain Length:972
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U5 small nuclear ribonucleoprotein 200 kDa helicase
Chain IDs:E
Chain Length:2136
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U5 small nuclear ribonucleoprotein 40 kDa protein
Chain IDs:F
Chain Length:86
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Pre-mRNA-processing factor 6
Chain IDs:G
Chain Length:76
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Thioredoxin-like protein 4B
Chain IDs:H
Chain Length:240
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Probable ATP-dependent RNA helicase DDX23
Chain IDs:I
Chain Length:119
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polyribonucleotide
Description:U4atac snRNA
Chain IDs:Q (auth: J)
Chain Length:131
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polyribonucleotide
Description:U6atac snRNA
Chain IDs:R (auth: K)
Chain Length:125
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U4/U6 small nuclear ribonucleoprotein Prp31
Chain IDs:S (auth: L)
Chain Length:499
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U4/U6 small nuclear ribonucleoprotein Prp4
Chain IDs:T (auth: M)
Chain Length:522
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U4/U6 small nuclear ribonucleoprotein Prp3
Chain IDs:U (auth: N)
Chain Length:76
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:NHP2-like protein 1
Chain IDs:V (auth: O)
Chain Length:240
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polyribonucleotide
Description:U11 snRNA
Chain IDs:EA (auth: P)
Chain Length:119
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Serine/threonine-protein kinase PRP4 homolog
Chain IDs:TA (auth: Q)
Chain Length:118
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Centrosomal AT-AC splicing factor
Chain IDs:W (auth: R)
Chain Length:332
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U4/U6.U5 tri-snRNP-associated protein 1
Chain IDs:RA (auth: S)
Chain Length:800
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U4/U6.U5 tri-snRNP-associated protein 2
Chain IDs:SA (auth: U)
Chain Length:76
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Zinc finger matrin-type protein 5
Chain IDs:FA (auth: V)
Chain Length:170
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U11/U12 small nuclear ribonucleoprotein 35 kDa protein
Chain IDs:GA (auth: W)
Chain Length:246
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U11/U12 small nuclear ribonucleoprotein 25 kDa protein
Chain IDs:HA (auth: X)
Chain Length:132
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:U11/U12 small nuclear ribonucleoprotein 48 kDa protein
Chain IDs:IA (auth: Y)
Chain Length:339
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Programmed cell death protein 7
Chain IDs:JA (auth: Z)
Chain Length:485
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Small nuclear ribonucleoprotein-associated proteins B and B'
Chain IDs:J (auth: a), X (auth: h), KA (auth: o)
Chain Length:280
Number of Molecules:3
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Small nuclear ribonucleoprotein Sm D1
Chain IDs:K (auth: b), Y (auth: i), LA (auth: p)
Chain Length:119
Number of Molecules:3
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Small nuclear ribonucleoprotein Sm D2
Chain IDs:L (auth: c), Z (auth: j), MA (auth: q)
Chain Length:118
Number of Molecules:3
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Small nuclear ribonucleoprotein Sm D3
Chain IDs:M (auth: d), AA (auth: k), NA (auth: r)
Chain Length:972
Number of Molecules:3
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Small nuclear ribonucleoprotein E
Chain IDs:N (auth: e), BA (auth: l), OA (auth: s)
Chain Length:2136
Number of Molecules:3
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Small nuclear ribonucleoprotein F
Chain IDs:O (auth: f), CA (auth: m), PA (auth: t)
Chain Length:86
Number of Molecules:3
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Small nuclear ribonucleoprotein G
Chain IDs:P (auth: g), DA (auth: n), QA (auth: u)
Chain Length:76
Number of Molecules:3
Biological Source:Homo sapiens
Primary Citation
Structural basis of U12-type intron engagement by the fully assembled human minor spliceosome.
Science 383 1245 1252 (2024)
PMID: 38484052 DOI: 10.1126/science.adn7272

Abstact

The minor spliceosome, which is responsible for the splicing of U12-type introns, comprises five small nuclear RNAs (snRNAs), of which only one is shared with the major spliceosome. In this work, we report the 3.3-angstrom cryo-electron microscopy structure of the fully assembled human minor spliceosome pre-B complex. The atomic model includes U11 small nuclear ribonucleoprotein (snRNP), U12 snRNP, and U4atac/U6atac.U5 tri-snRNP. U11 snRNA is recognized by five U11-specific proteins (20K, 25K, 35K, 48K, and 59K) and the heptameric Sm ring. The 3' half of the 5'-splice site forms a duplex with U11 snRNA; the 5' half is recognized by U11-35K, U11-48K, and U11 snRNA. Two proteins, CENATAC and DIM2/TXNL4B, specifically associate with the minor tri-snRNP. A structural analysis uncovered how two conformationally similar tri-snRNPs are differentiated by the minor and major prespliceosomes for assembly.

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