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Protein Builder

Explore the four levels of protein structure by building your own protein!

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Primary Structure

The linear sequence of amino acids connected by peptide bonds. This is the foundation - the order determines everything that follows!

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Secondary Structure

Local folding patterns like alpha helixes and beta sheets, stabilized by hydrogen bonds between backbone atoms.

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Tertiary Structure

The complete 3D shape of a single polypeptide chain, formed by interactions between R-groups (side chains).

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Quaternary Structure

Multiple polypeptide chains coming together to form a functional protein complex. Not all proteins have this level!

Interactive Protein Builder
PEEBEDU

Amino Acid Legend

Activity Log

Chain Templates

Drag and drop chains to build complexes.

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Tertiary Folding

Drag R groups to fold the protein and form stabilizing interactions.

Score: 0%
Disulfide bonds (C-S-S-C): 0
Ionic bonds (+/-): 0
Hydrophobic clusters: 0
Hydrogen bonds: 0

Interaction Types:

Disulfide bond (C-S-S-C)
Ionic bond (NH3+ โ†” COO-)
Hydrophobic (CH3 groups)
Hydrogen bond (OHยทยทยทNH2)
Hydrophilic (OHยทยทยทH2O)

Quaternary Assembly

Drag pre-made polypeptide chains from the palette below to build protein complexes.

Chains: 1
Total amino acids: 0
Active chains: 1
Inter-chain contacts: 0