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Updated: Jun 2, 2026

A Protocol for Computer-Based Protein Structure and Function Prediction
Published on: November 3, 2011
Binding conformation prediction between human acetylcholinesterase and cytochrome c using molecular modeling methods
Songmi Kim1, Yuno Lee, Prettina Lazar
1Division of Applied Life Science (BK21 Program), Research Institute of Natural Science (RINS), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Republic of Korea.
This study reveals how human acetylcholinesterase (hAChE) binds to human cytochrome c (hCyt c), crucial for apoptosome formation. Molecular simulations identified key interactions essential for this process.
Area of Science:
- Biochemistry
- Molecular Biology
- Structural Biology
Background:
- Acetylcholinesterase (AChE) terminates neurotransmission at cholinergic synapses.
- Recent studies highlight AChE's role in apoptosome formation via interactions with cytochrome c (Cyt c).
Purpose of the Study:
- To investigate the binding conformation between human AChE (hAChE) and human Cyt c (hCyt c).
- To understand the influence of the heme group on the binding interaction.
Main Methods:
- Macromolecular docking simulation using DOT 2.0.
- Two 10ns molecular dynamics (MD) simulations were performed on the docked structure.
- Analysis of binding conformations in the absence (Apo) and presence (Holo) of the heme group.
Main Results:
- Human Cyt c (hCyt c) binds to the peripheral anionic site (PAS) of hAChE.
- Key hydrogen bonding residues and cation-pi (π) interactions were identified between hAChE and hCyt c.
- Differences in flexibility, interface interactions, and accessible surface areas were observed between Apo and Holo systems.
Conclusions:
- A reasonable binding conformation between hAChE and hCyt c was predicted.
- This binding conformation is essential for apoptosome formation.
- The study provides structural insights into the interaction of AChE and Cyt c.
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