6AVJ

Crystal structure of human Mitochondrial inner NEET protein (MiNT)/CISD3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

Structure of the human monomeric NEET protein MiNT and its role in regulating iron and reactive oxygen species in cancer cells.

Lipper, C.H.Karmi, O.Sohn, Y.S.Darash-Yahana, M.Lammert, H.Song, L.Liu, A.Mittler, R.Nechushtai, R.Onuchic, J.N.Jennings, P.A.

(2018) Proc Natl Acad Sci U S A 115: 272-277

  • DOI: https://doi.org/10.1073/pnas.1715842115
  • Primary Citation of Related Structures:  
    6AVJ

  • PubMed Abstract: 

    The NEET family is a relatively new class of three related [2Fe-2S] proteins (CISD1-3), important in human health and disease. While there has been growing interest in the homodimeric gene products of CISD1 (mitoNEET) and CISD2 (NAF-1), the importance of the inner mitochondrial CISD3 protein has only recently been recognized in cancer. The CISD3 gene encodes for a monomeric protein that contains two [2Fe-2S] CDGSH motifs, which we term mitochondrial inner NEET protein (MiNT). It folds with a pseudosymmetrical fold that provides a hydrophobic motif on one side and a relatively hydrophilic surface on the diametrically opposed surface. Interestingly, as shown by molecular dynamics simulation, the protein displays distinct asymmetrical backbone motions, unlike its homodimeric counterparts that face the cytosolic side of the outer mitochondrial membrane/endoplasmic reticulum (ER). However, like its counterparts, our biological studies indicate that knockdown of MiNT leads to increased accumulation of mitochondrial labile iron, as well as increased mitochondrial reactive oxygen production. Taken together, our study suggests that the MiNT protein functions in the same pathway as its homodimeric counterparts (mitoNEET and NAF-1), and could be a key player in this pathway within the mitochondria. As such, it represents a target for anticancer or antidiabetic drug development.


  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CDGSH iron-sulfur domain-containing protein 3, mitochondrial
A, B, C
92Homo sapiensMutation(s): 2 
Gene Names: CISD3
UniProt & NIH Common Fund Data Resources
Find proteins for P0C7P0 (Homo sapiens)
Explore P0C7P0 
Go to UniProtKB:  P0C7P0
PHAROS:  P0C7P0
GTEx:  ENSG00000277972 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C7P0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.406α = 90
b = 52.25β = 108.67
c = 78.951γ = 90
Software Package:
Software NamePurpose
PHENIXmodel building
PHENIXrefinement
PDB_EXTRACTdata extraction
XPREPdata reduction
APEXdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM101467
National Science Foundation (NSF, United States)United StatesPHY-1427654
National Science Foundation (NSF, United States)United StatesCHE-1614101
Israel Science FoundationIsraelISF-865/13
National Science Foundation (NSF, United States)United StatesMCB-1613462
United States - Israel Binational Science Foundation (BSF)Israel2015831

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-20
    Type: Initial release
  • Version 1.1: 2018-01-03
    Changes: Database references
  • Version 1.2: 2018-01-17
    Changes: Database references
  • Version 1.3: 2019-11-27
    Changes: Author supporting evidence
  • Version 1.4: 2023-10-04
    Changes: Data collection, Database references, Refinement description