8HAE

Cryo-EM structure of HACE1 dimer


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.55 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Basis for the Enzymatic Activity of the HACE1 HECT-Type E3 Ligase Through N-Terminal Helix Dimerization.

Singh, S.Machida, S.Tulsian, N.K.Choong, Y.K.Ng, J.Shankar, S.Liu, Y.Chandiramani, K.V.Shi, J.Sivaraman, J.

(2023) Adv Sci (Weinh) 10: e2207672-e2207672

  • DOI: https://doi.org/10.1002/advs.202207672
  • Primary Citation of Related Structures:  
    8H8X, 8HAE

  • PubMed Abstract: 

    HACE1 is an ankyrin repeat (AKR) containing HECT-type E3 ubiquitin ligase that interacts with and ubiquitinates multiple substrates. While HACE1 is a well-known tumor suppressor, its structure and mode of ubiquitination are not understood. The authors present the cryo-EM structures of human HACE1 along with in vitro functional studies that provide insights into how the enzymatic activity of HACE1 is regulated. HACE1 comprises of an N-terminal AKR domain, a middle (MID) domain, and a C-terminal HECT domain. Its unique G-shaped architecture interacts as a homodimer, with monomers arranged in an antiparallel manner. In this dimeric arrangement, HACE1 ubiquitination activity is hampered, as the N-terminal helix of one monomer restricts access to the C-terminal domain of the other. The in vitro ubiquitination assays, hydrogen-deuterium exchange mass spectrometry (HDX-MS) analysis, mutagenesis, and in silico modeling suggest that the HACE1 MID domain plays a crucial role along with the AKRs in RAC1 substrate recognition.


  • Organizational Affiliation

    Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore, 117558, Singapore.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
E3 ubiquitin-protein ligase HACE1
A, B
909Homo sapiensMutation(s): 0 
Gene Names: HACE1KIAA1320
EC: 2.3.2.26
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IYU2 (Homo sapiens)
Explore Q8IYU2 
Go to UniProtKB:  Q8IYU2
PHAROS:  Q8IYU2
GTEx:  ENSG00000085382 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8IYU2
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.55 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.13_2998:

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Education (MoE, Singapore)Singapore--

Revision History  (Full details and data files)

  • Version 1.0: 2023-06-28
    Type: Initial release
  • Version 1.1: 2023-08-16
    Changes: Data collection, Database references
  • Version 1.2: 2023-08-30
    Changes: Database references
  • Version 1.3: 2023-10-04
    Changes: Database references