International Overview of the Boundary‑Centric Allostery Model and the IE Index
1. Conceptual Breakthrough: Allostery Emerges at Boundaries, Not Cores
Traditional allostery models—rigid‑body rotation, α/β domain shifts, enthalpy/entropy decomposition—fail to explain many experimentally observed allosteric behaviors.
The Boundary‑Centric Allostery (BCA) Model proposes that:
Allosteric propagation originates at structural boundaries,
Energy transfer occurs through mass‑scaled vibrational networks,
Functional outcomes depend on boundary topology, not rigid cores.
This reframes allostery as a network‑level phenomenon, not a domain‑level event.
2. The IE Index: A Unified Quantitative Metric for Allosteric Effect
The IE (Impact–Equilibrium) Index is the first framework that integrates:
(1) Impact Energy
Mass‑scaled vibrational energy injected at the ligand‑binding boundary.
(2) Boundary Network Propagation
Energy flow through a weighted, topology‑dependent boundary network.
(3) Equilibrium Docking Energy
The final energetic state at the functional site.
This index provides a continuous, quantitative measure of allosteric influence— a capability missing from all existing models.
3. Why This Matters Globally
A. Solves the “unmeasurable allostery” problem
For decades, allostery has been described qualitatively. The IE index enables predictive, reproducible quantification.
B. Enables allosteric‑clean drug design
By identifying boundary‑specific propagation paths, the model allows design of molecules that:
Activate desired pathways
Avoid off‑target propagation
Minimize systemic side effects
This is a major unmet need in global pharmaceutical research.
C. Integrates physics, structural biology, and drug design
The model unifies:
Vibrational physics
Network theory
Structural biology
Computational docking
Medicinal chemistry
Such integration is rare even in top research institutions.
4. Distinctive Features Compared to Existing Global Models
| Existing Paradigms | Boundary‑Centric AE / IE |
|---|---|
| Rigid‑body or domain‑shift models | Boundary‑origin propagation |
| Entropy/enthalpy decomposition | Mass‑scaled vibrational impact |
| Qualitative descriptions | Quantitative IE metric |
| Local structural focus | Global boundary network topology |
| Trial‑and‑error drug design | Mechanism‑driven selectivity |
This positions the BCA/IE framework as a next‑generation allostery theory.
5. Practical Applications
Predicting allosteric pathways in large proteins
Designing selective inhibitors with minimal off‑target effects
Reinterpreting mutational impacts through boundary topology
Reconstructing allosteric networks from structural data
Guiding AI‑driven molecular design
The model is compatible with existing computational pipelines and can be integrated into global drug discovery workflows.
6. Why This Framework Is Globally Significant
The BCA/IE theory provides:
A new conceptual foundation
A quantitative index
A mechanism‑driven design principle
A unified language for physicists, biologists, and chemists
This combination is exceptionally rare. It positions the theory not as incremental progress, but as a paradigm‑level contribution to the field of allostery.
2026年1月19日 | カテゴリー:論文/講義/発表用 |




