2F9J

3.0 angstrom resolution structure of a Y22M mutant of the spliceosomal protein p14 bound to a region of SF3b155


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of a core spliceosomal protein interface

Schellenberg, M.J.Edwards, R.A.Ritchie, D.B.Kent, O.A.Golas, M.M.Stark, H.Glover, J.N.M.Macmillan, A.M.

(2006) Proc.Natl.Acad.Sci.Usa 103: 1266-1271

  • DOI: 10.1073/pnas.0508048103
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The precise excision of introns from precursor mRNAs (pre-mRNAs) in eukaryotes is accomplished by the spliceosome, a complex assembly containing five small nuclear ribonucleoprotein (snRNP) particles. Human p14, a component of the spliceosomal U2 and ...

    The precise excision of introns from precursor mRNAs (pre-mRNAs) in eukaryotes is accomplished by the spliceosome, a complex assembly containing five small nuclear ribonucleoprotein (snRNP) particles. Human p14, a component of the spliceosomal U2 and U11/U12 snRNPs, has been shown to associate directly with the pre-mRNA branch adenosine early in spliceosome assembly and within the fully assembled spliceosome. Here we report the 2.5-A crystal structure of a complex containing p14 and a peptide derived from the p14-associated U2 snRNP component SF3b155. p14 contains an RNA recognition motif (RRM), the surface of which is largely occluded by a C-terminal alpha-helix and a portion of the SF3b155 peptide. An analysis of RNA.protein crosslinking to wild-type and mutant p14 shows that the branch adenosine directly interacts with a conserved aromatic within a pocket on the surface of the complex. This result, combined with a comparison of the structure with known RRMs and pseudoRRMs as well as model-building by using the electron cryomicroscopy structure of a spliceosomal U11/U12 di-snRNP, suggests that p14.SF3b155 presents a noncanonical surface for RNA recognition at the heart of the mammalian spliceosome.


    Organizational Affiliation

    Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2H7.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pre-mRNA branch site protein p14
A, B
125Homo sapiensMutation(s): 1 
Gene Names: SF3B6 (SAP14, SF3B14, SF3B14A)
Find proteins for Q9Y3B4 (Homo sapiens)
Go to Gene View: SF3B6
Go to UniProtKB:  Q9Y3B4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Splicing factor 3B subunit 1
P, Q
36Homo sapiensMutation(s): 1 
Gene Names: SF3B1 (SAP155)
Find proteins for O75533 (Homo sapiens)
Go to Gene View: SF3B1
Go to UniProtKB:  O75533
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.219 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 71.271α = 90.00
b = 71.271β = 90.00
c = 102.284γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-24
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance
  • Version 1.3: 2017-10-18
    Type: Refinement description