3HIB

Crystal structure of the second Sec63 domain of yeast Brr2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.257 
  • R-Value Work: 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: 10.1038/nsmb.1625

  • 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 secon ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pre-mRNA-splicing helicase BRR2
A
318Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: BRR2 (RSS1, SNU246)
EC: 3.6.4.13
Find proteins for P32639 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P32639
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.246 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 55.153α = 90.00
b = 75.678β = 90.00
c = 83.955γ = 90.00
Software Package:
Software NamePurpose
CrystalCleardata collection
CNSrefinement
SOLVEphasing
d*TREKdata reduction
d*TREKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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