3H1D

Structure of the HUWE1 HECT Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.892 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A structural element within the HUWE1 HECT domain modulates self-ubiquitination and substrate ubiquitination activities.

Pandya, R.K.Partridge, J.R.Love, K.R.Schwartz, T.U.Ploegh, H.L.

(2010) J.Biol.Chem. 285: 5664-5673

  • DOI: 10.1074/jbc.M109.051805

  • PubMed Abstract: 
  • E3 ubiquitin ligases catalyze the final step of ubiquitin conjugation and regulate numerous cellular processes. The HECT class of E3 ubiquitin (Ub) ligases directly transfers Ub from bound E2 enzyme to a myriad of substrates. The catalytic domain of ...

    E3 ubiquitin ligases catalyze the final step of ubiquitin conjugation and regulate numerous cellular processes. The HECT class of E3 ubiquitin (Ub) ligases directly transfers Ub from bound E2 enzyme to a myriad of substrates. The catalytic domain of HECT Ub ligases has a bilobal architecture that separates the E2 binding region and catalytic site. An important question regarding HECT domain function is the control of ligase activity and specificity. Here we present a functional analysis of the HECT domain of the E3 ligase HUWE1 based on crystal structures and show that a single N-terminal helix significantly stabilizes the HECT domain. We observe that this element modulates HECT domain activity, as measured by self-ubiquitination induced in the absence of this helix, as distinct from its effects on Ub conjugation of substrate Mcl-1. Such subtle changes to the protein may be at the heart of the vast spectrum of substrate specificities displayed by HECT domain E3 ligases.


    Organizational Affiliation

    Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02142, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
E3 ubiquitin-protein ligase HUWE1
A
405Homo sapiensMutation(s): 3 
Gene Names: HUWE1 (KIAA0312, KIAA1578, UREB1)
EC: 2.3.2.26
Find proteins for Q7Z6Z7 (Homo sapiens)
Go to Gene View: HUWE1
Go to UniProtKB:  Q7Z6Z7
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.892 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.166 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 119.654α = 90.00
b = 55.653β = 122.49
c = 69.585γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
ADSCdata collection
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-12-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance