3HIB

Crystal structure of the second Sec63 domain of yeast Brr2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.246 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural evidence for consecutive Hel308-like modules in the spliceosomal ATPase Brr2.

Zhang, L.Xu, T.Maeder, C.Bud, L.O.Shanks, J.Nix, J.Guthrie, C.Pleiss, J.A.Zhao, R.

(2009) Nat Struct Mol Biol 16: 731-739

  • DOI: https://doi.org/10.1038/nsmb.1625
  • Primary Citation of Related Structures:  
    3HIB

  • PubMed Abstract: 

    Brr2 is a DExD/H-box helicase responsible for U4/U6 unwinding during spliceosomal activation. Brr2 contains two helicase-like domains, each of which is followed by a Sec63 domain with unknown function. We determined the crystal structure of the second Sec63 domain, which unexpectedly resembles domains 4 and 5 of DNA helicase Hel308. This, together with sequence similarities between Brr2's helicase-like domains and domains 1-3 of Hel308, led us to hypothesize that Brr2 contains two consecutive Hel308-like modules (Hel308-I and Hel308-II). Our structural model and mutagenesis data suggest that Brr2 shares a similar helicase mechanism with Hel308. We demonstrate that Hel308-II interacts with Prp8 and Snu114 in vitro and in vivo. We further find that the C-terminal region of Prp8 (Prp8-CTR) facilitates the binding of the Brr2-Prp8-CTR complex to U4/U6. Our results have important implications for the mechanism and regulation of Brr2's activity in splicing.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Genetics, University of Colorado Denver, Aurora, Colorado, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Pre-mRNA-splicing helicase BRR2318Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: BRR2RSS1SNU246SYGP-ORF66YER172C
EC: 3.6.1 (PDB Primary Data), 3.6.4.13 (UniProt)
UniProt
Find proteins for P32639 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32639 
Go to UniProtKB:  P32639
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32639
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.246 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.153α = 90
b = 75.678β = 90
c = 83.955γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
SOLVEphasing
CNSrefinement
d*TREKdata reduction
d*TREKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-06-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance