Hydrophobic Collapse
Early-stage folding often appears as rapid structural contraction as the system seeks a more compact core.
Interactive Molecular Dynamics Laboratory
ProteinPathfinder
ProteinPathfinder is an experimental folding simulator for exploring how simplified molecular rules generate compact structure, hydrophobic collapse, thermal fluctuation, and stable folding basins over time.
It turns protein folding into an interactive landscape you can probe directly by changing sequence, hydrophobic strength, temperature, and experimental conditions.
Folding
Track structural collapse from an unfolded state toward compact or partially folded conformations.
Landscape
Probe how parameter changes reshape the energy-like landscape the sequence moves through.
Live Logs
Observe compactness, size, and folding progress as the simulation unfolds in real time.
Snapshots
Store and compare experiments to see which conditions produce convergence, instability, or plateau behaviour.
What ProteinPathfinder Models
ProteinPathfinder explores simplified protein folding as a search through a constrained molecular landscape. Rather than reproducing full biochemistry, it provides an accessible simulation for observing collapse, packing, relaxation, and stabilisation under tunable conditions.
Thermal Motion
Temperature influences how strongly the structure fluctuates around candidate folded states or escapes shallow basins.
Stable Basins
Many runs settle into repeatable plateaus where compactness and folding progress oscillate around a stable region.
The Folding Model
ProteinPathfinder treats folding as an optimisation process shaped by sequence constraints, hydrophobic interactions, temperature, and structural geometry. The purpose is not to claim full molecular realism, but to make folding dynamics legible and experimentally explorable.
Key Readouts
- Core Compactness — how tightly the internal structure packs
- Overall Size — the global scale of the folded conformation
- Folding Progress — a composite indicator of structural advancement
Canonical Folding Picture
unfolded chain → rapid collapse → refinement → stable basin
Many runs display exactly this pattern: a fast early contraction followed by slower adjustment, relaxation, and eventual convergence around a persistent folded or partially folded state.
Key Parameters
The simulator is designed so you can sweep experimental conditions and watch how the folding landscape responds.
Sequence
- sequence archetype or custom pattern
- globular or other structural bias
- sequence-driven constraints
Interaction Strength
- hydrophobic strength
- packing sensitivity
- collapse aggressiveness
Experiment Conditions
- temperature
- step count
- experiment number / snapshot archive
Research Use
ProteinPathfinder forms the molecular layer of the Blue Whale platform. It complements network and agent simulations by showing how constrained optimisation produces compact structure at a smaller physical scale.
Useful Questions
- How fast does collapse happen under stronger hydrophobic forcing?
- When does the structure over-compress and then relax outward?
- What signatures indicate a true stable basin rather than a transient compact state?
- How reproducible are final folded states across repeated runs?
Why It Matters
Folding is one of the clearest examples of structure emerging from local rules and constrained search. ProteinPathfinder makes that process visible, measurable, and comparable across experiments.
Run a folding experiment
Launch ProteinPathfinder, vary the sequence and conditions, and compare how different runs converge toward compact structural basins.