8AU4 | pdb_00008au4

Structural insights reveal a heterotetramer between oncogenic K-Ras4BG12V and Rgl2, a RalA/B activator

• PDB DOI: https://doi.org/10.2210/pdb8AU4/pdb
• BMRB: 34754

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2022-08-25 Released: 2023-08-23 
• Deposition Author(s): Tariq, M., Ikeya, T., Togashi, N., Fairall, L., Alejo, C.B., Kamei, S., Alonso, B.R., Campillo, M.A.M., Hudson, A., Ito, Y., Schwabe, J., Dominguez, C., Tanaka, K.
• Funding Organization(s): Japan Science and Technology, Japan Society for the Promotion of Science (JSPS), Other private

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: target function 

Literature

Structural insights into the complex of oncogenic KRas4B G12V and Rgl2, a RalA/B activator.

Tariq, M., Ikeya, T., Togashi, N., Fairall, L., Kamei, S., Mayooramurugan, S., Abbott, L.R., Hasan, A., Bueno-Alejo, C., Sukegawa, S., Romartinez-Alonso, B., Muro Campillo, M.A., Hudson, A.J., Ito, Y., Schwabe, J.W., Dominguez, C., Tanaka, K.

(2024) Life Sci Alliance 7

• PubMed: 37833074 
• DOI: https://doi.org/10.26508/lsa.202302080
• Primary Citation Related Structures: 
  8AU4, 8B69


• PubMed Abstract: 
  

  About a quarter of total human cancers carry mutations in Ras isoforms. Accumulating evidence suggests that small GTPases, RalA, and RalB, and their activators, Ral guanine nucleotide exchange factors (RalGEFs), play an essential role in oncogenic Ras-induced signalling. We studied the interaction between human KRas4B and the Ras association (RA) domain of Rgl2 (Rgl2 ^RA ), one of the RA-containing RalGEFs. We show that the G12V oncogenic KRas4B mutation changes the interaction kinetics with Rgl2 ^RA The crystal structure of the KRas4B ^G12V : Rgl2 ^RA complex shows a 2:2 heterotetramer where the switch I and switch II regions of each KRas ^G12V interact with both Rgl2 ^RA molecules. This structural arrangement is highly similar to the HRas ^E31K :RALGDS ^RA crystal structure and is distinct from the well-characterised Ras:Raf complex. Interestingly, the G12V mutation was found at the dimer interface of KRas4B ^G12V with its partner. Our study reveals a potentially distinct mode of Ras:effector complex formation by RalGEFs and offers a possible mechanistic explanation for how the oncogenic KRas4B ^G12V hyperactivates the RalA/B pathway.

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Organizational Affiliation: 
• https://ror.org/04h699437 Department of Molecular and Cell Biology, University of Leicester, Leicester, UK.
https://ror.org/00ws30h19 Department of Chemistry, Tokyo Metropolitan University, Hachioji, Japan.
https://ror.org/04h699437 Leicester Institute of Structure and Chemical Biology, University of Leicester, Leicester, UK.
https://ror.org/04h699437 Department of Chemistry, University of Leicester, Leicester, UK.
https://ror.org/04h699437 Department of Molecular and Cell Biology, University of Leicester, Leicester, UK [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: NMR Distance Restraints

Macromolecule Content 

• Total Structure Weight: 10.97 kDa 
• Atom Count: 766 
• Modeled Residue Count: 100 
• Deposited Residue Count: 100 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ral guanine nucleotide dissociation stimulator-like 2	A	100	Homo sapiens	Mutation(s): 0  Gene Names: RGL2, RAB2L
UniProt & NIH Common Fund Data Resources
Find proteins for O15211 (Homo sapiens) Explore O15211  Go to UniProtKB:  O15211
PHAROS:  O15211 GTEx:  ENSG00000237441

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: target function 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2023-08-23 
Deposition Author(s): Tariq, M., Ikeya, T., Togashi, N., Fairall, L., Alejo, C.B., Kamei, S., Alonso, B.R., Campillo, M.A.M., Hudson, A., Ito, Y., Schwabe, J., Dominguez, C., Tanaka, K.

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Funding Organization	Location	Grant Number
Japan Science and Technology	Japan	JPMJCR13M3, JPMJCR21E5
Japan Society for the Promotion of Science (JSPS)	Japan	JP15K06979, JP15K06979, JP15H01645, JP16H00847, JP17H05887, JP19H05773, JP19H05773, JP19H05773, JP19H05773, JP19H05773
Other private		Shimazu foundation
Other private		the Precise Measurement Technology Promotion Foundation

Revision History  

• Version 1.0: 2023-08-23
  Type: Initial release
  
• Version 1.1: 2023-10-25
  Changes: Database references