3DDT

Crystal structure of the B2 box from MuRF1 in dimeric state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural analysis of B-Box 2 from MuRF1: identification of a novel self-association pattern in a RING-like fold

Mrosek, M.Meier, S.Ucurum-Fotiadis, Z.von Castelmur, E.Hedbom, E.Lustig, A.Grzesiek, S.Labeit, D.Labeit, S.Mayans, O.

(2008) Biochemistry 47: 10722-10730

  • DOI: 10.1021/bi800733z

  • PubMed Abstract: 
  • The B-box motif is the defining feature of the TRIM family of proteins, characterized by a RING finger-B-box-coiled coil tripartite fold. We have elucidated the crystal structure of B-box 2 (B2) from MuRF1, a TRIM protein that supports a wide variety ...

    The B-box motif is the defining feature of the TRIM family of proteins, characterized by a RING finger-B-box-coiled coil tripartite fold. We have elucidated the crystal structure of B-box 2 (B2) from MuRF1, a TRIM protein that supports a wide variety of protein interactions in the sarcomere and regulates the trophic state of striated muscle tissue. MuRF1 B2 coordinates two zinc ions through a cross-brace alpha/beta-topology typical of members of the RING finger superfamily. However, it self-associates into dimers with high affinity. The dimerization pattern is mediated by the helical component of this fold and is unique among RING-like folds. This B2 reveals a long shallow groove that encircles the C-terminal metal binding site ZnII and appears as the defining protein-protein interaction feature of this domain. A cluster of conserved hydrophobic residues in this groove and, in particular, a highly conserved aromatic residue (Y133 in MuRF1 B2) is likely to be central to this role. We expect these findings to aid the future exploration of the cellular function and therapeutic potential of MuRF1.


    Organizational Affiliation

    Division of Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
E3 ubiquitin-protein ligase TRIM63
A, B, C
48Homo sapiensMutation(s): 0 
Gene Names: TRIM63 (IRF, MURF1, RNF28, SMRZ)
EC: 2.3.2.27
Find proteins for Q969Q1 (Homo sapiens)
Go to Gene View: TRIM63
Go to UniProtKB:  Q969Q1
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.199 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 76.220α = 90.00
b = 76.220β = 90.00
c = 146.930γ = 120.00
Software Package:
Software NamePurpose
XSCALEdata scaling
SOLVEphasing
PHENIXrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2008-06-06 
  • Released Date: 2008-10-07 
  • Deposition Author(s): Mayans, O., Mrosek, M.

Revision History 

  • Version 1.0: 2008-10-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance