3PT3

Crystal structure of the C-terminal lobe of the human UBR5 HECT domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of the HECT C-lobe of the UBR5 E3 ubiquitin ligase.

Matta-Camacho, E.Kozlov, G.Menade, M.Gehring, K.

(2012) Acta Crystallogr.,Sect.F 68: 1158-1163

  • DOI: 10.1107/S1744309112036937

  • PubMed Abstract: 
  • UBR5 ubiquitin ligase (also known as EDD, Rat100 or hHYD) is a member of the E3 protein family of HECT (homologous to E6-AP C-terminus) ligases as it contains a C-terminal HECT domain. In ubiquitination cascades involving E3s of the HECT class, ubiqu ...

    UBR5 ubiquitin ligase (also known as EDD, Rat100 or hHYD) is a member of the E3 protein family of HECT (homologous to E6-AP C-terminus) ligases as it contains a C-terminal HECT domain. In ubiquitination cascades involving E3s of the HECT class, ubiquitin is transferred from an associated E2 ubiquitin-conjugating enzyme to the acceptor cysteine of the HECT domain, which consists of structurally distinct N- and C-lobes connected by a flexible linker. Here, the high-resolution crystal structure of the C-lobe of the HECT domain of human UBR5 is presented. The structure reveals important features that are unique compared with other HECT domains. In particular, a distinct four-residue insert in the second helix elongates this helix, resulting in a strikingly different orientation of the preceding loop. This protruding loop is likely to contribute to specificity towards the E2 ubiquitin-conjugating enzyme UBCH4, which is an important functional partner of UBR5. Ubiquitination assays showed that the C-lobe of UBR5 is able to form a thioester-linked E3-ubiquitin complex, although it does not physically interact with UBCH4 in NMR experiments. This study contributes to a better understanding of UBR5 ubiquitination activity.


    Organizational Affiliation

    Groupe de Recherche axé sur la Structure des Protéines, Department of Biochemistry, McGill University, Montreal, Quebec H3G 0B1, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
E3 ubiquitin-protein ligase UBR5
A, B
118Homo sapiensMutation(s): 0 
Gene Names: UBR5 (EDD, EDD1, HYD, KIAA0896)
EC: 2.3.2.26
Find proteins for O95071 (Homo sapiens)
Go to Gene View: UBR5
Go to UniProtKB:  O95071
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.219 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 29.240α = 90.04
b = 39.070β = 84.59
c = 44.170γ = 81.77
Software Package:
Software NamePurpose
HKL-2000data scaling
ADSCdata collection
HKL-2000data reduction
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-01-25
    Type: Initial release
  • Version 1.1: 2012-10-17
    Type: Database references