1E7K image
Deposition Date 2000-08-29
Release Date 2001-02-19
Last Version Date 2024-05-08
Entry Detail
PDB ID:
1E7K
Keywords:
RNA BINDING PROTEIN
Title:
Crystal structure of the spliceosomal 15.5kD protein bound to a U4 snRNA fragment
Biological Source:
Source Organism:
HOMO SAPIENS (Taxon ID: 9606)
Host Organism:
ESCHERICHIA COLI
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.90 Å
R-Value Free:
0.30
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 21 21 21
1E7K validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:15.5 KD RNA BINDING PROTEIN
Gene (Uniprot):SNU13
Chain IDs:A, B
Chain Length:128
Number of Molecules:2
Biological Source:HOMO SAPIENS
UniProt ID:P55769 Pfam ID:PF01248
Polymer Type:polyribonucleotide
Molecule:RNA (5'-R(*GP*CP*CP*AP*AP*UP*GP*AP*GP*GP*UP*UP*UP* AP*UP*CP*CP*GP*AP*GP*G*C(-3')
Chain IDs:C, D
Chain Length:22
Number of Molecules:2
Biological Source:HOMO SAPIENS
Ligand Molecules
NA
Primary Citation
Crystal Structure of the Spliceosomal 15.5Kd Protein Bound to a U4 Snrna Fragment
Mol.Cell 6 1331 ? (2000)
PMID: 11163207 DOI: 10.1016/S1097-2765(00)00131-3

Abstact

We have determined the crystal structure of a spliceosomal RNP complex comprising the 15.5kD protein of the human U4/U6.U5 tri-snRNP and the 5' stem-loop of U4 snRNA. The protein interacts almost exclusively with a purine-rich (5+2) internal loop within the 5' stem-loop, giving an unusual RNA fold characterized by two tandem sheared G-A base pairs, a high degree of purine stacking, and the accommodation of a single RNA base, rotated out of the RNA chain, in a pocket of the protein. Apart from yielding the structure of an important entity in the pre-mRNA splicing apparatus, this work also implies a model for the complex of the 15.5kD protein with box C/D snoRNAs. It additionally suggests a general recognition principle in a novel family of RNA binding proteins.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
1E7K