8qp8

Electron Microscopy
3.5Å resolution

Cryo-EM Structure of Pre-B Complex (core part)

Released:

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).
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero pentadecamer (preferred)
PDBe Complex ID:
PDB-CPX-301367 (preferred)
Entry contents:
12 distinct polypeptide molecules
3 distinct RNA molecules
Macromolecules (15 distinct):
Splicing factor 3A subunit 1 Chain: 7
Molecule details ›
Chain: 7
Length: 793 amino acids
Theoretical weight: 88.99 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q15459 (Residues: 1-793; Coverage: 100%)
Gene names: SAP114, SF3A1
Sequence domains:
Probable ATP-dependent RNA helicase DDX23 Chain: G
Molecule details ›
Chain: G
Length: 820 amino acids
Theoretical weight: 95.79 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: Q9BUQ8 (Residues: 1-820; Coverage: 100%)
Gene name: DDX23
Sequence domains:
U4/U6.U5 tri-snRNP-associated protein 1 Chain: S
116 kDa U5 small nuclear ribonucleoprotein component Chain: C
Ubiquitin carboxyl-terminal hydrolase 39 Chain: U
Pre-mRNA-processing-splicing factor 8 Chain: A
RNA-binding protein 42 Chain: R
Pre-mRNA-processing factor 6 Chain: N
U4/U6 small nuclear ribonucleoprotein Prp31 Chain: L
U4/U6 small nuclear ribonucleoprotein Prp3 Chain: J
Thioredoxin-like protein 4A Chain: D
U4/U6.U5 small nuclear ribonucleoprotein 27 kDa protein Chain: X
U6 snRNA Chain: 6
U5 snRNA Chain: 5
U4 snRNA Chain: 4

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

wwPDB Validation report is not available for this EM entry.
Resolution: 3.5Å
Relevant EMDB volumes: EMD-18544