In Silico Studies on GCP-Lys-OMe as a Potential 14-3-3σ Homodimer Stabilizer

Area of Science:

• Biochemistry
• Molecular Biology
• Cancer Research

Background:

• 14-3-3 sigma is a critical negative regulator of the cell cycle.
• Its expression is frequently reduced in cancers via promoter hypermethylation or proteasomal degradation.
• 14-3-3 sigma requires homodimerization for function, and dimers resist degradation more than monomers.

Purpose of the Study:

• To investigate GCP-Lys-OMe as a potential stabilizer for the 14-3-3 sigma homodimer.
• To assess if GCP-Lys-OMe can bind and stabilize 14-3-3 sigma dimers, thereby potentially enhancing its tumor-suppressive functions.

Main Methods:

• In silico molecular docking of GCP-Lys-OMe on 14-3-3 sigma.
• 100 ns molecular dynamics simulations of the GCP-Lys-OMe/14-3-3 sigma complex.
• Analysis of protein-ligand interactions, interface contacts, and conformational space.

Main Results:

• GCP-Lys-OMe exhibited a favorable interaction energy (-9.63 kcal/mole) with the 14-3-3 sigma dimer interface.
• Molecular dynamics simulations confirmed a stable interaction between GCP-Lys-OMe and 14-3-3 sigma.
• The bound complex showed increased interface contacts and reduced conformational flexibility compared to the apo form.

Conclusions:

• GCP-Lys-OMe demonstrates potential as a homodimer stabilizer for 14-3-3 sigma.
• This finding suggests a novel therapeutic strategy to restore 14-3-3 sigma's tumor-suppressive activity in cancer.