7MP6

Neurofibromin homodimer


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.25 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The cryo-EM structure of the human neurofibromin dimer reveals the molecular basis for neurofibromatosis type 1.

Lupton, C.J.Bayly-Jones, C.D'Andrea, L.Huang, C.Schittenhelm, R.B.Venugopal, H.Whisstock, J.C.Halls, M.L.Ellisdon, A.M.

(2021) Nat Struct Mol Biol 28: 982-988

  • DOI: 10.1038/s41594-021-00687-2
  • Primary Citation of Related Structures:  
    7MOC, 7MP5, 7MP6

  • PubMed Abstract: 
  • Neurofibromin (NF1) mutations cause neurofibromatosis type 1 and drive numerous cancers, including breast and brain tumors. NF1 inhibits cellular proliferation through its guanosine triphosphatase-activating protein (GAP) activity against rat sarcoma (RAS) ...

    Neurofibromin (NF1) mutations cause neurofibromatosis type 1 and drive numerous cancers, including breast and brain tumors. NF1 inhibits cellular proliferation through its guanosine triphosphatase-activating protein (GAP) activity against rat sarcoma (RAS). In the present study, cryo-electron microscope studies reveal that the human ~640-kDa NF1 homodimer features a gigantic 30 × 10 nm array of α-helices that form a core lemniscate-shaped scaffold. Three-dimensional variability analysis captured the catalytic GAP-related domain and lipid-binding SEC-PH domains positioned against the core scaffold in a closed, autoinhibited conformation. We postulate that interaction with the plasma membrane may release the closed conformation to promote RAS inactivation. Our structural data further allow us to map the location of disease-associated NF1 variants and provide a long-sought-after structural explanation for the extreme susceptibility of the molecule to loss-of-function mutations. Collectively these findings present potential new routes for therapeutic modulation of the RAS pathway.


    Organizational Affiliation

    Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia. andrew.ellisdon@monash.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Isoform I of NeurofibrominA, B2,826Homo sapiensMutation(s): 0 
Gene Names: NF1
UniProt & NIH Common Fund Data Resources
Find proteins for P21359 (Homo sapiens)
Explore P21359 
Go to UniProtKB:  P21359
PHAROS:  P21359
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21359
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.25 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not fundedAustralia--

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-15
    Type: Initial release
  • Version 1.1: 2021-12-29
    Changes: Database references
  • Version 1.2: 2022-03-16
    Changes: Structure summary