Mortalin nucleotide binding domain in the ADP-bound state

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

  • Deposited: 2018-12-23 Released: 2019-04-17 
  • Deposition Author(s): Page, R.C., Moseng, M.A., Nix, J.C.
  • Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID), National Science Foundation (NSF, United States)

Experimental Data Snapshot

  • Resolution: 2.78 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.259 

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This is version 1.3 of the entry. See complete history


Biophysical Consequences of EVEN-PLUS Syndrome Mutations for the Function of Mortalin.

Moseng, M.A.Nix, J.C.Page, R.C.

(2019) J Phys Chem B 123: 3383-3396

  • DOI: https://doi.org/10.1021/acs.jpcb.9b00071
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    HSPA9, the gene coding for the mitochondrial chaperone mortalin, is involved in various cellular roles such as mitochondrial protein import, folding, degradation, Fe-S cluster biogenesis, mitochondrial homeostasis, and regulation of the antiapoptotic protein p53. Mutations in the HSPA9 gene, particularly within the region coding for the nucleotide-binding domain (NBD), cause the autosomal disorder known as EVEN-PLUS syndrome. The resulting mutants R126W and Y128C are located on the surface of the mortalin-NBD near the binding interface with the interdomain linker (IDL). We used differential scanning fluorimetry (DSF), biolayer interferometry, X-ray crystallography, ATP hydrolysis assays, and Rosetta docking simulations to study the structural and functional consequences of the EVEN-PLUS syndrome-associated R126W and Y128C mutations within the mortalin-NBD. These results indicate that the surface mutations R126W and Y128C have far-reaching effects that disrupt ATP hydrolysis, interdomain linker binding, and thermostability and increase the propensity for aggregation. The structural differences observed provide insight into how the conformations of mortalin differ from other heat shock protein 70 (Hsp70) homologues. Combined, our biophysical and structural studies contribute to the understanding of the molecular basis for how disease-associated mortalin mutations affect mortalin functionality and the pathogenesis of EVEN-PLUS syndrome.

  • Organizational Affiliation

    Department of Chemistry and Biochemistry , Miami University , Oxford , Ohio 45056 , United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Stress-70 protein, mitochondrial
A, B
383Homo sapiensMutation(s): 0 
Gene Names: HSPA9GRP75HSPA9Bmt-HSP70
UniProt & NIH Common Fund Data Resources
Find proteins for P38646 (Homo sapiens)
Explore P38646 
Go to UniProtKB:  P38646
PHAROS:  P38646
GTEx:  ENSG00000113013 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP38646
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ADP

Download Ideal Coordinates CCD File 
C [auth A],
G [auth B]
C10 H15 N5 O10 P2
Query on PO4

Download Ideal Coordinates CCD File 
D [auth A],
H [auth B]
O4 P
Query on GOL

Download Ideal Coordinates CCD File 
C3 H8 O3
Query on MG

Download Ideal Coordinates CCD File 
E [auth A],
I [auth B]
Experimental Data & Validation

Experimental Data

  • Resolution: 2.78 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.259 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 177.263α = 90
b = 60.102β = 97.56
c = 91.699γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR35 GM128595
National Science Foundation (NSF, United States)United StatesMCB 15-52113

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-17
    Type: Initial release
  • Version 1.1: 2019-05-08
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-27
    Changes: Author supporting evidence
  • Version 1.3: 2023-10-11
    Changes: Data collection, Database references, Derived calculations, Refinement description