Crystal structure of Nematocida HUWE1

Experimental Data Snapshot

  • Resolution: 3.04 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


HUWE1 employs a giant substrate-binding ring to feed and regulate its HECT E3 domain.

Grabarczyk, D.B.Petrova, O.A.Deszcz, L.Kurzbauer, R.Murphy, P.Ahel, J.Vogel, A.Gogova, R.Faas, V.Kordic, D.Schleiffer, A.Meinhart, A.Imre, R.Lehner, A.Neuhold, J.Bader, G.Stolt-Bergner, P.Bottcher, J.Wolkerstorfer, B.Fischer, G.Grishkovskaya, I.Haselbach, D.Kessler, D.Clausen, T.

(2021) Nat Chem Biol 17: 1084-1092

  • DOI: https://doi.org/10.1038/s41589-021-00831-5
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    HUWE1 is a universal quality-control E3 ligase that marks diverse client proteins for proteasomal degradation. Although the giant HECT enzyme is an essential component of the ubiquitin-proteasome system closely linked with severe human diseases, its molecular mechanism is little understood. Here, we present the crystal structure of Nematocida HUWE1, revealing how a single E3 enzyme has specificity for a multitude of unrelated substrates. The protein adopts a remarkable snake-like structure, where the C-terminal HECT domain heads an extended alpha-solenoid body that coils in on itself and houses various protein-protein interaction modules. Our integrative structural analysis shows that this ring structure is highly dynamic, enabling the flexible HECT domain to reach protein targets presented by the various acceptor sites. Together, our data demonstrate how HUWE1 is regulated by its unique structure, adapting a promiscuous E3 ligase to selectively target unassembled orphan proteins.

  • Organizational Affiliation

    Research Institute of Molecular Pathology, Vienna BioCenter, Vienna, Austria. daniel.grabarczyk@imp.ac.at.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
E3 ubiquitin-protein ligase HUWE1
A, B
2,492Nematocida sp. ERTm5Mutation(s): 1 
Gene Names: NEIG_01557
Find proteins for A0A177ELV2 (Nematocida sp. ERTm5)
Explore A0A177ELV2 
Go to UniProtKB:  A0A177ELV2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A177ELV2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.04 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.519α = 92.22
b = 96.218β = 100.45
c = 199.655γ = 95.33
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata reduction
STARANISOdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Austrian Science FundAustria--

Revision History  (Full details and data files)

  • Version 1.0: 2021-07-28
    Type: Initial release
  • Version 1.1: 2022-02-09
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Refinement description