Crystal structure of human AUH (3-methylglutaconyl-coa hydratase) mixed with (AUUU)24A RNA

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 

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AU-rich RNA-binding induces changes in the quaternary structure of AUH

Kurimoto, K.Kuwasako, K.Sandercock, A.M.Unzai, S.Robinson, C.V.Muto, Y.Yokoyama, S.

(2009) Proteins 75: 360-372

  • DOI: https://doi.org/10.1002/prot.22246
  • Primary Citation of Related Structures:  
    2ZQQ, 2ZQR

  • PubMed Abstract: 

    The human AU RNA binding protein/enoyl-Coenzyme A hydratase (AUH) is a 3-hydroxy-3-methylglutaconyl-CoA dehydratase in the leucine degradation pathway. It also possesses an RNA-binding activity to AUUU repeats, which involves no known conserved RNA-binding domains and is seemingly unrelated to the enzymatic activity. In this study, we performed mass spectrometric analyses to elucidate the oligomeric states of AUH in the presence and absence of RNA. With a short RNA (AUUU) or without RNA, AUH mainly exists as a trimer in solution. On the other hand, the AUH trimer dimerizes upon binding to one molecule of a long RNA containing 24 repeats of the AUUU motif, (AUUU)(24)A. AUH was crystallized with the long RNA. Although the RNA was disordered in the crystalline lattice, the AUH structure was determined as an asymmetric dimer of trimers with a kink in the alignment of the trimer axes, resulting in the formation of two clefts with significantly different sizes.

  • Organizational Affiliation

    RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Methylglutaconyl-CoA hydratase
A, B, C, D, E
A, B, C, D, E, F
272Homo sapiensMutation(s): 0 
Gene Names: AUH
UniProt & NIH Common Fund Data Resources
Find proteins for Q13825 (Homo sapiens)
Explore Q13825 
Go to UniProtKB:  Q13825
PHAROS:  Q13825
GTEx:  ENSG00000148090 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13825
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.74α = 90
b = 129.276β = 94.32
c = 88.586γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-06-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Refinement description