2VY5 image
Deposition Date 2008-07-18
Release Date 2009-02-17
Last Version Date 2024-05-15
Entry Detail
PDB ID:
2VY5
Keywords:
Title:
U11-48K CHHC Zn-finger protein domain
Biological Source:
Source Organism:
HOMO SAPIENS (Taxon ID: 9606)
Method Details:
Experimental Method:
Conformers Calculated:
25
Conformers Submitted:
1
Selection Criteria:
LEAST RESTRAINT VIOLATION
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:U11/U12 SMALL NUCLEAR RIBONUCLEOPROTEIN 48 KDA PROTEIN
Gene (Uniprot):SNRNP48
Chain IDs:A
Chain Length:37
Number of Molecules:1
Biological Source:HOMO SAPIENS
Ligand Molecules
Primary Citation
Solution structure of the U11-48K CHHC zinc-finger domain that specifically binds the 5' splice site of U12-type introns.
Structure 17 294 302 (2009)
PMID: 19217400 DOI: 10.1016/j.str.2008.11.013

Abstact

The formation of stable 18S U11/U12 di-snRNPs before their association with the pre-mRNA is a characteristic feature of the minor spliceosome. During the spliceosomal assembly, the 18S snRNP binds cooperatively to the introns' 5' splice and branch point site. The molecular basis for this recognition is still unknown. Here, we report the solution structure of the U11-48K CHHC Zn finger, a domain unique to the minor spliceosome. The CHHC Zn-finger structure revealed an unexpected similarity to the TFIIIA domains, with distinct features originating from the type and separation of the zinc-coordinating residues. We show that this domain specifically binds the 5' splice site sequence of U12-type introns when base paired to U11 snRNA in vitro and hence may contribute to the U12 intron recognition. We propose a model in which the U11-48K Zn finger stabilizes U11-5' splice site base pairing and thus plays an important role during the minor spliceosome assembly.

Legend

Protein

Chemical

Disease

Primary Citation of related structures