8h6e

Electron Microscopy
3.2Å resolution

Cryo-EM structure of human exon-defined spliceosome in the late pre-B state.

Released:
Source organism: Homo sapiens
Related structures: EMD-34500

Function and Biology Details

Reactions catalysed:
ATP + H(2)O = ADP + phosphate
Thiol-dependent hydrolysis of ester, thioester, amide, peptide and isopeptide bonds formed by the C-terminal Gly of ubiquitin (a 76-residue protein attached to proteins as an intracellular targeting signal).
ATP + a protein = ADP + a phosphoprotein
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero 61-mer (preferred)
PDBe Complex ID:
PDB-CPX-293049 (preferred)
Entry contents:
42 distinct polypeptide molecules
5 distinct RNA molecules
Macromolecules (47 distinct):
U6 snRNA-associated Sm-like protein LSm2 Chain: 6a
Molecule details ›
Chain: 6a
Length: 95 amino acids
Theoretical weight: 10.85 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q9Y333 (Residues: 1-95; Coverage: 100%)
Gene names: C6orf28, G7B, LSM2
Sequence domains: LSM domain
U6 snRNA-associated Sm-like protein LSm3 Chain: 6b
Molecule details ›
Chain: 6b
Length: 102 amino acids
Theoretical weight: 11.86 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P62310 (Residues: 1-102; Coverage: 100%)
Gene names: LSM3, MDS017
Sequence domains: LSM domain
U6 snRNA-associated Sm-like protein LSm4 Chain: 6c
U6 snRNA-associated Sm-like protein LSm5 Chain: 6d
U6 snRNA-associated Sm-like protein LSm6 Chain: 6e
U6 snRNA-associated Sm-like protein LSm7 Chain: 6f
U6 snRNA-associated Sm-like protein LSm8 Chain: 6g
Pre-mRNA-processing-splicing factor 8 Chain: 5B
116 kDa U5 small nuclear ribonucleoprotein component Chain: 5C
U5 small nuclear ribonucleoprotein 200 kDa helicase Chain: 5D
U5 small nuclear ribonucleoprotein 40 kDa protein Chain: 5E
Small nuclear ribonucleoprotein-associated proteins B and B' Chains: 2a, 4a, 5a
Small nuclear ribonucleoprotein Sm D1 Chains: 2b, 4b, 5b
Small nuclear ribonucleoprotein Sm D2 Chains: 2c, 4c, 5c
Small nuclear ribonucleoprotein F Chains: 2d, 4d, 5d
Small nuclear ribonucleoprotein E Chains: 2e, 4e, 5e
Small nuclear ribonucleoprotein G Chains: 2f, 4f, 5f
Small nuclear ribonucleoprotein Sm D3 Chains: 2g, 4g, 5g
U4/U6 small nuclear ribonucleoprotein Prp3 Chain: 4B
U4/U6 small nuclear ribonucleoprotein Prp4 Chain: 4C
U4/U6 small nuclear ribonucleoprotein Prp31 Chain: 4D
NHP2-like protein 1 Chain: 4E
Thioredoxin-like protein 4A Chain: 4F
Pre-mRNA-processing factor 6 Chain: 4G
RNA-binding protein 42 Chain: 4R
U4/U6.U5 tri-snRNP-associated protein 1 Chain: 4S
Ubiquitin carboxyl-terminal hydrolase 39 Chain: 4T
Probable ATP-dependent RNA helicase DDX23 Chain: 4U
U4/U6.U5 small nuclear ribonucleoprotein 27 kDa protein Chain: 4X
Serine/threonine-protein kinase PRP4 homolog Chain: 4Y
U2 small nuclear ribonucleoprotein A' Chain: 2B
U2 small nuclear ribonucleoprotein B'' Chain: 2C
Splicing factor 3A subunit 1 Chain: 2D
Splicing factor 3A subunit 2 Chain: 2E
Splicing factor 3A subunit 3 Chain: 2F
Splicing factor 3B subunit 1 Chain: 2G
Splicing factor 3B subunit 2 Chain: 2H
Splicing factor 3B subunit 3 Chain: 2I
Splicing factor 3B subunit 4 Chain: 2J
Splicing factor 3B subunit 6 Chain: 2K
PHD finger-like domain-containing protein 5A Chain: 2L
Splicing factor 3B subunit 5 Chain: 2M
pre-mRNA Chain: A
U6 snRNA Chain: 6A
U5 snRNA Chain: 5A
U4 snRNA Chain: 4A
U2 snRNA Chain: 2A

Ligands and Environments

No modified residues

Experiments and Validation Details

wwPDB Validation report is not available for this EM entry.
Resolution: 3.2Å
Relevant EMDB volumes: EMD-34500