8OJL

Human Mitochondrial Lon Y394E Mutant ADP Bound


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.88 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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This is version 1.1 of the entry. See complete history


Literature

Polyphosphate and tyrosine phosphorylation in the N-terminal domain of the human mitochondrial Lon protease disrupts its functions.

Kunova, N.Ondrovicova, G.Bauer, J.A.Krajcovicova, V.Pinkas, M.Stojkovicova, B.Havalova, H.Lukacova, V.Kohutova, L.Kostan, J.Martinakova, L.Barath, P.Novacek, J.Zoll, S.Kereiche, S.Kutejova, E.Pevala, V.

(2024) Sci Rep 14: 9923-9923

  • DOI: https://doi.org/10.1038/s41598-024-60030-9
  • Primary Citation of Related Structures:  
    8OJL, 8OKA, 8OM7, 8OVF, 8OVG

  • PubMed Abstract: 

    Phosphorylation plays a crucial role in the regulation of many fundamental cellular processes. Phosphorylation levels are increased in many cancer cells where they may promote changes in mitochondrial homeostasis. Proteomic studies on various types of cancer identified 17 phosphorylation sites within the human ATP-dependent protease Lon, which degrades misfolded, unassembled and oxidatively damaged proteins in mitochondria. Most of these sites were found in Lon's N-terminal (NTD) and ATPase domains, though little is known about the effects on their function. By combining the biochemical and cryo-electron microscopy studies, we show the effect of Tyr186 and Tyr394 phosphorylations in Lon's NTD, which greatly reduce all Lon activities without affecting its ability to bind substrates or perturbing its tertiary structure. A substantial reduction in Lon's activities is also observed in the presence of polyphosphate, whose amount significantly increases in cancer cells. Our study thus provides an insight into the possible fine-tuning of Lon activities in human diseases, which highlights Lon's importance in maintaining proteostasis in mitochondria.


  • Organizational Affiliation

    Department of Biochemistry and Protein Structure, Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská Cesta 21, 845 51, Bratislava, Slovakia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lon protease homolog, mitochondrial
A, B, C, D, E
A, B, C, D, E, F
869Homo sapiensMutation(s): 1 
Gene Names: LONP1PRSS15
EC: 3.4.21.53
UniProt & NIH Common Fund Data Resources
Find proteins for P36776 (Homo sapiens)
Explore P36776 
Go to UniProtKB:  P36776
PHAROS:  P36776
GTEx:  ENSG00000196365 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP36776
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.88 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.21rc1_4895

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other governmentAPVV-15-0375
Other governmentAPVV-19-0298
Other governmentVEGA-2/0069/23
Other governmentVEGA-2/0131/20
European Regional Development FundEuropean UnionITMS:305011X666
Ministry of Education, Youth and Sports of the Czech RepublicCzech RepublicCIISB project LM2018127
Czech Science FoundationCzech Republic1825144Y

Revision History  (Full details and data files)

  • Version 1.0: 2024-04-03
    Type: Initial release
  • Version 1.1: 2024-05-15
    Changes: Database references