Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 47.81 kDa 
• Atom Count: 3547 
• Modelled Residue Count: 382 
• Deposited Residue Count: 405 
• Unique protein chains: 1

3H1D

Structure of the HUWE1 HECT Domain

• DOI: 10.2210/pdb3H1D/pdb

• Classification: LIGASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2009-04-11 Released: 2009-12-08 
• Deposition Author(s): Partridge, J.R., Schwartz, T.U.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.89 Å
• R-Value Free: 0.229 
• R-Value Work: 0.166 
• R-Value Observed: 0.169 

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

• PubMed: 20007713 
• DOI: 10.1074/jbc.M109.051805
• Primary Citation of Related Structures:  
  3H1D


• 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 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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
E3 ubiquitin-protein ligase HUWE1	A	405	Homo sapiens	Mutation(s): 3  Gene Names: HUWE1, KIAA0312, KIAA1578, UREB1, HSPC272 EC: 6.3.2 (PDB Primary Data), 2.3.2.26 (UniProt)
Find proteins for Q7Z6Z7 (Homo sapiens) Explore Q7Z6Z7  Go to UniProtKB:  Q7Z6Z7
NIH Common Fund Data Resources
PHAROS:  Q7Z6Z7 GTEx:  ENSG00000086758

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A], C [auth A], D [auth A], E [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.89 Å
• R-Value Free: 0.229 
• R-Value Work: 0.166 
• R-Value Observed: 0.169 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 119.654	α = 90
b = 55.653	β = 122.49
c = 69.585	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-04-11 
• Released Date: 2009-12-08 
Deposition Author(s): Partridge, J.R., Schwartz, T.U.

Revision History  

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