2C7N

Human Rabex-5 residues 1-74 in complex with Ubiquitin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of the Ubiquitin Binding Domains of Rabex-5 Reveals Two Modes of Interaction with Ubiquitin.

Penengo, L.Mapelli, M.Murachelli, A.G.Confalonieri, S.Magri, L.Musacchio, A.Di Fiore, P.P.Polo, S.Schneider, T.R.

(2006) Cell 124: 1183

  • DOI: 10.1016/j.cell.2006.02.020
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The interaction between ubiquitinated proteins and intracellular proteins harboring ubiquitin binding domains (UBDs) is critical to a multitude of cellular processes. Here, we report that Rabex-5, a guanine nucleotide exchange factor for Rab5, binds ...

    The interaction between ubiquitinated proteins and intracellular proteins harboring ubiquitin binding domains (UBDs) is critical to a multitude of cellular processes. Here, we report that Rabex-5, a guanine nucleotide exchange factor for Rab5, binds to Ub through two independent UBDs. These UBDs determine a number of properties of Rabex-5, including its coupled monoubiquitination and interaction in vivo with ubiquitinated EGFRs. Structural and biochemical characterization of the UBDs of Rabex-5 revealed that one of them (MIU, motif interacting with ubiquitin) binds to Ub with modes superimposable to those of the UIM (ubiquitin-interacting motif):Ub interaction, although in the opposite orientation. The other UBD, RUZ (Rabex-5 ubiquitin binding zinc finger) binds to a surface of Ub centered on Asp58(Ub) and distinct from the "canonical" Ile44(Ub)-based surface. The two binding surfaces allow Ub to interact simultaneously with different UBDs, thus opening new perspectives in Ub-mediated signaling.


    Organizational Affiliation

    IFOM, the FIRC Institute for Molecular Oncology Foundation, Via Adamello 16, 20139 Milan, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RAB GUANINE NUCLEOTIDE EXCHANGE FACTOR 1
A, C, E, G, I, K
74Homo sapiensMutation(s): 0 
Gene Names: RABGEF1 (RABEX5)
Find proteins for Q9UJ41 (Homo sapiens)
Go to Gene View: RABGEF1
Go to UniProtKB:  Q9UJ41
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
UBIQUITIN
B, D, F, H, J, L
76Bos taurusMutation(s): 0 
Gene Names: UBC
Find proteins for P0CH28 (Bos taurus)
Go to Gene View: UBC
Go to UniProtKB:  P0CH28
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.195 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 44.300α = 108.20
b = 68.900β = 102.70
c = 98.500γ = 90.40
Software Package:
Software NamePurpose
HKL2MAPphasing
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-02-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance