This page, as it appeared on June 14, 2016, was featured in this article in the journal Biochemistry and Molecular Biology Education.


SHOC2-PP1C-MRASSHOC2-PP1C-MRAS


Introduction

SHOC2-PP1C-MRAS complex is a ternary holophosphatase complex formed by the individual proteins: SHOC2, PP1C, and MRAS. SHOC2-PP1C-MRAS complex is involved in cell proliferation because it functions as a regulator of RTK-RAS signaling by activating RAF through dephosphorization. Complex formation is initiated by ligand binding of receptor tyrosine kinase receptor(RTK). The RTK activates membrane bound MRAS by signaling the exchange of GDP for GTP. GTP bound MRAS initiates complex formation, this complex and is able to dephosphorylate the RAF complex leading to further downstream signaling effects.



Overall Structure

SHOC2

MRAS

Key Ligand Interactions

 
Figure 3: Electrostatic illustration of the amphipathic binding pocket of the LPA1 receptor. This binding pocket was revealed by cutting away the exterior or the protein. This binding pocket, located in the interior of the protein, has both polar and nonpolar regions. The blue and red coloration highlight the positively and negatively charged regions, respectively, and the white color shows the nonpolar region of the binding pocket.

SHOC2 and PP1C

SHOC2 and MRAS

PP1C and MRAS

Signaling Pathway

Disease Relevance

Cancer

RASopathies

Future Studies

3D structures of lysophosphatidic acid receptor

4z34, 4z35, 4z36 - hLPA1 + antagonist - human

2lq4 – hLPA1 second extracellular loop – NMR
4p0c – hLPA2/NHERF2
5xsz – LPA6A (mutant) – zebra fish

References

Proteopedia Resources

Category:Lysophosphatidic acid binding

Category:Lysophosphatidic acid

Butler University Proteopedia Pages

See also:

SHOC2-MRAS-PP1C

Drag the structure with the mouse to rotate

Student ContributorsStudent Contributors

Madeline Gilbert Inaya Patel Rushda Hussein

Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)

OCA, Jaime Prilusky, Madeline Gilbert, Inaya Patel