1OPI image
Deposition Date 2003-03-05
Release Date 2004-03-16
Last Version Date 2024-05-22
Entry Detail
PDB ID:
1OPI
Keywords:
RNA BINDING PROTEIN
Title:
SOLUTION STRUCTURE OF THE THIRD RNA RECOGNITION MOTIF (RRM) OF U2AF65 IN COMPLEX WITH AN N-TERMINAL SF1 PEPTIDE
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
(Taxon ID: )
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
100
Conformers Submitted:
10
Selection Criteria:
STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS, STRUCTURES WITH THE LOWEST ENERGY
1OPI validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:SPLICING FACTOR U2AF 65 KDA SUBUNIT
Gene (Uniprot):U2AF2
Chain IDs:A
Chain Length:104
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P26368 Pfam ID:PF00076
Protein Blast
Polymer Type:polypeptide(L)
Molecule:SPLICING FACTOR SF1
Gene (Uniprot):SF1
Chain IDs:B
Chain Length:13
Number of Molecules:1
Biological Source:
UniProt ID:Q15637
Ligand Molecules
NA
Primary Citation
Structural basis for the molecular recognition between human splicing factors U2AF65 and SF1/mBBP
Mol.Cell 11 965 976 (2003)
PMID: 12718882 DOI: 10.1016/S1097-2765(03)00115-1

Abstact

The essential splicing factors SF1 and U2AF play an important role in the recognition of the pre-mRNA 3' splice site during early spliceosome assembly. The structure of the C-terminal RRM (RRM3) of human U2AF(65) complexed to an N-terminal peptide of SF1 reveals an extended negatively charged helix A and an additional helix C. Helix C shields the potential RNA binding surface. SF1 binds to the opposite, helical face of RRM3. It inserts a conserved tryptophan into a hydrophobic pocket between helices A and B in a way that strikingly resembles part of the molecular interface in the U2AF heterodimer. This molecular recognition establishes a paradigm for protein binding by a subfamily of noncanonical RRMs.

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Primary Citation of related structures
1O0P