8FPW

Crystal structure of tumor related RhoA mutant A161V in complex with GDP

  • Classification: SIGNALING PROTEIN
  • Organism(s): Homo sapiens
  • Expression System: Bacteria
  • Mutation(s): Yes 

  • Deposited: 2023-01-05 Released: 2024-06-05 
  • Deposition Author(s): Lin, Y., Zheng, Y.
  • Funding Organization(s): National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.180 

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


Literature

Tumor-derived RHOA mutants interact with effectors in the GDP-bound state.

Lin, Y.Ramelot, T.A.Senyuz, S.Gursoy, A.Jang, H.Nussinov, R.Keskin, O.Zheng, Y.

(2024) Nat Commun 15: 7176-7176

  • DOI: https://doi.org/10.1038/s41467-024-51445-z
  • Primary Citation of Related Structures:  
    8FPW, 8FPX

  • PubMed Abstract: 

    RHOA mutations are found at diverse residues in various cancer types, implying mutation- and cell-specific mechanisms of tumorigenesis. Here, we focus on the underlying mechanisms of two gain-of-function RHOA mutations, A161P and A161V, identified in adult T-cell leukemia/lymphoma. We find that RHOA A161P and RHOA A161V are both fast-cycling mutants with increased guanine nucleotide dissociation/association rates compared with RHOA WT and show reduced GTP-hydrolysis activity. Crystal structures reveal an altered nucleotide association in RHOA A161P and an open nucleotide pocket in RHOA A161V . Both mutations perturb the dynamic properties of RHOA switch regions and shift the conformational landscape important for RHOA activity, as shown by 31 P NMR and molecular dynamics simulations. Interestingly, RHOA A161P and RHOA A161V can interact with effectors in the GDP-bound state. 1 H- 15 N HSQC NMR spectra support the existence of an active population in RHOA A161V -GDP. The distinct interaction mechanisms resulting from the mutations likely favor an RHOA WT -like "ON" conformation, endowing GDP-bound state effector binding activity.


  • Organizational Affiliation

    Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. yuan.lin@cchmc.org.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transforming protein RhoA183Homo sapiensMutation(s): 2 
Gene Names: RHOAARH12ARHARHO12
EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P61586 (Homo sapiens)
Explore P61586 
Go to UniProtKB:  P61586
PHAROS:  P61586
GTEx:  ENSG00000067560 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61586
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.180 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.01α = 90
b = 86.844β = 93.75
c = 34.337γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesR01 HL147536
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesP01 HL158688
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesU54 DK126108

Revision History  (Full details and data files)

  • Version 1.0: 2024-06-05
    Type: Initial release
  • Version 1.1: 2024-09-04
    Changes: Database references