7TVG | pdb_00007tvg

Deposited: 2022-02-04 Released: 2022-05-04
Deposition Author(s): Bonsor, D.A., Simanshu, D.K.
Funding Organization(s): National Institutes of Health/National Cancer Institute (NIH/NCI)

Experimental Data Snapshot

wwPDB Validation 3D Report Full Report

This is version 1.4 of the entry. See complete history.

(2022) Nat Struct Mol Biol 29: 966-977

PubMed Abstract:
SHOC2 acts as a strong synthetic lethal interactor with MEK inhibitors in multiple KRAS cancer cell lines. SHOC2 forms a heterotrimeric complex with MRAS and PP1C that is essential for regulating RAF and MAPK-pathway activation by dephosphorylating a specific phosphoserine on RAF kinases. Here we present the high-resolution crystal structure of the SHOC2-MRAS-PP1C (SMP) complex and apo-SHOC2. Our structures reveal that SHOC2, MRAS, and PP1C form a stable ternary complex in which all three proteins synergistically interact with each other. Our results show that dephosphorylation of RAF substrates by PP1C is enhanced upon interacting with SHOC2 and MRAS. The SMP complex forms only when MRAS is in an active state and is dependent on SHOC2 functioning as a scaffolding protein in the complex by bringing PP1C and MRAS together. Our results provide structural insights into the role of the SMP complex in RAF activation and how mutations found in Noonan syndrome enhance complex formation, and reveal new avenues for therapeutic interventions.

Organizational Affiliation

NCI RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, MD, USA.

Macromolecule Content

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Leucine-rich repeat protein SHOC-2	A [auth D]	507	Homo sapiens	Mutation(s): 0 Gene Names: SHOC2, KIAA0862
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UQ13 (Homo sapiens) Explore Q9UQ13 Go to UniProtKB: Q9UQ13
PHAROS: Q9UQ13 GTEx: ENSG00000108061
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q9UQ13
Sequence Annotations Expand
Reference Sequence

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
SO4 Query on SO4 Download:Ideal Coordinates CCD File SDF format, chain B [auth D] SDF format, chain C [auth D] SDF format, chain D SDF format, chain E [auth D] SDF format, chain F [auth D] SDF format, chain G [auth D] MOL2 format, chain B [auth D] MOL2 format, chain C [auth D] MOL2 format, chain D MOL2 format, chain E [auth D] MOL2 format, chain F [auth D] MOL2 format, chain G [auth D] mmCIF format, chain B [auth D] mmCIF format, chain C [auth D] mmCIF format, chain D mmCIF format, chain E [auth D] mmCIF format, chain F [auth D] mmCIF format, chain G [auth D]	B [auth D] C [auth D] D E [auth D] F [auth D] B [auth D], C [auth D], D, E [auth D], F [auth D], G [auth D]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain B [auth D] Focus chain C [auth D] Focus chain D Focus chain E [auth D] Focus chain F [auth D] Focus chain G [auth D] Interactions & Density Focus chain B [auth D] Focus chain C [auth D] Focus chain D Focus chain E [auth D] Focus chain F [auth D] Focus chain G [auth D]
CL Query on CL Download:Ideal Coordinates CCD File SDF format, chain H [auth D] MOL2 format, chain H [auth D] mmCIF format, chain H [auth D]	H [auth D]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M		Interactions Focus chain H [auth D] Interactions & Density Focus chain H [auth D]