About FoldCraft

Snap secondary motifs, collapse hydrophobic cores and carve active sites in this free online protein folding game about protein structure.

FoldCraft is a free online protein folding game where you snap secondary structure motifs into place, collapse the hydrophobic core and sculpt catalytic pockets. This protein design game hands you the same puzzle that took AlphaFold a Nobel-winning breakthrough to solve.

Proteins start as linear chains of amino acids and must fold into precise 3D shapes to function. Hydrophobic residues burrow inward away from water while polar residues stay on the surface, driving the chain to collapse into alpha helices and beta sheets that lock into a working architecture. The final fold determines everything an enzyme can do.

The docking step reflects why shape is destiny. Active sites emerge from folded geometry, not from any single residue, so a single misfold can destroy function or worse, produce toxic aggregates like those behind Alzheimer and prion diseases. Designing a pocket that fits a substrate is exactly the challenge computational biologists tackle when engineering new proteins.

Key Science Concepts

• Primary to tertiary protein structure
• Hydrophobic core collapse
• Alpha helices and beta sheets
• Active site geometry
• Protein misfolding and disease
• Computational protein design

What You'll Learn

• Describe how amino acid sequence determines fold
• Explain hydrophobic collapse as a folding driver
• Relate protein shape to catalytic function
• Connect misfolding to disease mechanisms

Grade Level: High School, College

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How to play

1. Torsion Snapping Move mouse or drag to position your chain. Tap Snap Motif or spacebar to flip between Alpha-Helix, Beta-Sheet and Loop!
2. Dock Substrate Keys Align your sculpted active pocket around incoming substrate keys to catalyze reactions and score huge combo points!
3. Shield From Proteases Tuck oily yellow residues inside the core. Rigid folds deflect shears, while floppy loops get snipped!
4. Allostery and Staples Collect allosteric keys for 2x substrate pull and disulfide staples for instant shields. Snap motifs to shatter sticky amyloid knots!

Frequently asked questions

Is FoldCraft free to play?

Yes. FoldCraft is completely free to play in your browser. There is no download, install or account needed.

What grade level is FoldCraft for?

FoldCraft is designed for High School, College students and works well as a classroom activity or homework.

Does FoldCraft work on phones and tablets?

Yes. FoldCraft runs in any modern browser on desktop computers, Chromebooks, tablets and phones in landscape mode.

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