Macromolecule Content

• Total Structure Weight: 7.07 kDa 
• Atom Count: 488 
• Residue Count: 60 
• Unique protein chains: 1

1WD2

Solution Structure of the C-terminal RING from a RING-IBR-RING (TRIAD) motif

• DOI: 10.2210/pdb1WD2/pdb

• Classification: LIGASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2004-05-11 Released: 2004-07-20 
• Deposition Author(s): Capili, A.D., Edghill, E.L., Wu, K., Borden, K.L.B.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structure of the C-terminal RING Finger from a RING-IBR-RING/TRIAD Motif Reveals a Novel Zinc-binding Domain Distinct from a RING

Capili, A.D., Edghill, E.L., Wu, K., Borden, K.L.B.

(2004) J Mol Biol 340: 1117-1129

• PubMed: 15236971 
• DOI: 10.1016/j.jmb.2004.05.035
• Primary Citation of Related Structures:  
  1WD2


• PubMed Abstract: 
  

The really interesting new gene (RING) family of proteins contains over 400 members with diverse physiological functions. A subset of these domains is found in the context of the RING-IBR-RING/TRIAD motifs which function as E3 ubiquitin ligases. Our sequence analysis of the C-terminal RING (RING2) from this motif show that several metal ligating and hydrophobic residues critical for the formation of a classical RING cross-brace structure are not present. Thus, we determined the structure of the RING2 from the RING-IBR-RING motif of HHARI and showed that RING2 has a completely distinct topology from classical RINGs. Notably, RING2 binds only one zinc atom per monomer rather than two and uses a different hydrophobic network to that of classical RINGs. Additionally, this RING2 topology is novel, bearing slight resemblance to zinc-ribbon motifs around the zinc site and is different from the topologies of the zinc binding sites found in RING and PHDs. We demonstrate that RING2 acts as an E3 ligase in vitro and using mutational analysis deduce the structural features required for this activity. Further, mutations in the RING-IBR-RING of Parkin cause a rare form of Parkinsonism and these studies provide an explanation for those mutations that occur in its RING2. From a comparison of the RING2 structure with those reported for RINGs, we infer sequence determinants that allow discrimination between RING2 and RING domains at the sequence analysis level.

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Organizational Affiliation: 

Structural Biology Program, Department of Physiology and Biophysics, Mount Sinai School of Medicine, New York University, New York, NY 10029, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ariadne-1 protein homolog	A	60	Homo sapiens	Mutation(s): 0  Gene Names: ARIH1, ARI, MOP6, UBCH7BP, HUSSY-27 EC: 6.3.2.19 (PDB Primary Data), 2.3.2.31 (UniProt)
Find proteins for Q9Y4X5 (Homo sapiens) Explore Q9Y4X5  Go to UniProtKB:  Q9Y4X5
NIH Common Fund Data Resources
PHAROS:  Q9Y4X5 GTEx:  ENSG00000166233

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1WD2 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-05-11 
• Released Date: 2004-07-20 
Deposition Author(s): Capili, A.D., Edghill, E.L., Wu, K., Borden, K.L.B.

Revision History 

• Version 1.0: 2004-07-20
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance