Scaffold proteins as dynamic integrators of biological processes

Area of Science:

• Molecular Biology
• Cell Signaling
• Structural Biology

Background:

• Scaffold proteins organize signaling pathways by docking multiple proteins.
• Over 300 human scaffolds are known, acting in diverse cellular processes.
• Scaffolds are not static but can undergo conformational changes impacting signaling.

Purpose of the Study:

• To review scaffold proteins exhibiting actionable conformational changes.
• To focus on the role of conformational change in STE5, KSR, NEMO, and SHANK3.
• To explore the link between scaffold conformational dynamics, phase separation, and disease.

Main Methods:

• Literature review of scaffold protein conformational changes.
• Analysis of specific examples: STE5, KSR, NEMO, SHANK3.
• Discussion of implications for signaling flexibility and disease.

Main Results:

• Scaffold proteins undergo dynamic conformational changes influencing signaling.
• These changes are critical for pathways like RAS, NF-κB, and postsynaptic density signaling.
• Aberrant scaffold conformational changes are linked to human diseases.

Conclusions:

• Scaffold protein conformation is a key regulatory mechanism in cell signaling.
• Understanding these dynamics offers insights into signaling flexibility.
• Targeting scaffold conformational changes may lead to new disease treatments.