1ZWZ

Structural comparison of Yeast snoRNP and splicesomal protein snu13p with its homologs


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural comparison of yeast snoRNP and spliceosomal protein Snu13p with its homologs

Oruganti, S.Zhang, Y.Li, H.

(2005) Biochem Biophys Res Commun 333: 550-554

  • DOI: 10.1016/j.bbrc.2005.05.141
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Snu13p is a bifunctional yeast protein involved in both messenger RNA splicing as well as ribosomal RNA maturation. Snu13p initiates assembly of ribonucleoprotein particles by interacting with a conserved RNA motif called kink turn. Unlike its archae ...

    Snu13p is a bifunctional yeast protein involved in both messenger RNA splicing as well as ribosomal RNA maturation. Snu13p initiates assembly of ribonucleoprotein particles by interacting with a conserved RNA motif called kink turn. Unlike its archaeal homolog, L7Ae, Snu13p displays differential specificity for functionally distinct kink turns. Thus, the structures of Snu13p at different functional states, including those alone and bound with RNAs, are required to understand how the protein differentially interacts with kink turns. Although the structure of the human homolog of Snu13p bound with a spliceosomal RNA is known, there has not been a report of a structure of free Snu13p. This has hindered our ability to understand the structural basis for Snu13p's substrate specificity. We report a crystal structure of free Snu13p at 1.9A and a detailed structural comparison with its homologs. We show that free Snu13p has nearly an identical conformation as that of its human homolog bound with RNA. Interestingly, both eukaryotic proteins exhibit notable structural differences in their central beta-sheets as compared to their archaeal homolog, L7Ae. The observed structural differences offer a possible explanation to the observed difference in RNA specificity between Snu13p and L7Ae.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Snu13p
A, B
126Saccharomyces cerevisiaeMutation(s): 0 
Find proteins for P39990 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P39990
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.133α = 90
b = 70.133β = 90
c = 54.701γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-05-23
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2019-07-24
    Changes: Data collection, Refinement description