A Leucine-Rich Repeat Protein Provides a SHOC2 the RAS Circuit: a Structure-Function Perspective

Area of Science:

• Molecular Biology
• Cell Signaling
• Structural Biology

Background:

• SHOC2 is a leucine-rich repeat protein involved in receptor tyrosine kinase (RTK)/RAS signaling.
• Gain-of-function mutations in SHOC2 cause Noonan-like syndrome, a RASopathy.
• SHOC2 plays a role in adaptive resistance to mitogen-activated protein kinase (MAPK) inhibitors.

Purpose of the Study:

• To review the structural features of SHOC2 that mediate its functions.
• To discuss SHOC2's structural elements in the context of binding partners and signaling pathways.
• To identify areas of SHOC2 biology lacking a consensus view.

Main Methods:

• Literature review of structural and functional studies on SHOC2.
• Analysis of SHOC2's role in RTK/RAS and MAPK signaling pathways.
• Examination of SHOC2's involvement in genetic disorders and drug resistance.

Main Results:

• SHOC2 acts as a scaffolding protein, facilitating proximal protein interactions and regulating subcellular localization.
• Structural features of SHOC2 are key to its function in signal transduction.
• SHOC2's role in RASopathies and MAPK inhibitor resistance is linked to its scaffolding capabilities.

Conclusions:

• SHOC2's structural characteristics underpin its critical roles in cellular signaling, development, and disease.
• Understanding SHOC2 structure-function relationships is essential for deciphering its involvement in RASopathies and therapeutic resistance.
• Further research is needed to resolve outstanding questions in SHOC2 biology.