Solution structure of human mitochondria fission protein Fis1

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


The Solution Structure of Human Mitochondria Fission Protein Fis1 Reveals a Novel TPR-like Helix Bundle

Suzuki, M.Jeong, S.Y.Karbowski, M.Youle, R.J.Tjandra, N.

(2003) J Mol Biol 334: 445-458

  • DOI: https://doi.org/10.1016/j.jmb.2003.09.064
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Fis1 in yeast localizes to the outer mitochondrial membrane and facilitates mitochondrial fission by forming protein complexes with Dnm1 and Mdv1. Fis1 orthologs exist in higher eukaryotes, suggesting that they are functionally conserved. In the present study, we cloned the human Fis1 ortholog that was predicted in a database, and determined the protein structure using NMR spectroscopy. Following a flexible N-terminal tail, six alpha-helices connected with short loops construct a single core domain. The C-terminal tail containing a transmembrane segment appears to be disordered. In the core domain, each of two sequentially adjacent helices forms a hairpin-like conformation, resulting in a six helix assembly forming a slightly twisted slab similar to that of a tandem array of tetratrico-peptide repeat (TPR) motif folds. Within this TPR-like core domain, no significant sequence similarity to the typical TPR motif is found. The structural analogy to the TPR-containing proteins suggests that Fis1 binds to other proteins at its concave hydrophobic surface. A simple composition of Fis1 comprised of a binding domain and a transmembrane segment indicates that the protein may function as a molecular adaptor on the mitochondrial outer membrane. In HeLa cells, however, increased levels in mitochondria-associated Fis1 did not result in mitochondrial translocation of Drp1, a potential binding partner of Fis1 implicated in the regulation of mitochondrial fission, suggesting that the interaction between Drp1 and Fis1 is regulated.

  • Organizational Affiliation

    Biochemistry Section, Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
mitochondria fission protein152Homo sapiensMutation(s): 0 
Gene Names: Fis1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y3D6 (Homo sapiens)
Explore Q9Y3D6 
Go to UniProtKB:  Q9Y3D6
GTEx:  ENSG00000214253 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y3D6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-12-09
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-05-29
    Changes: Data collection