Protein tools

Peptide properties, composition, isoelectric point and structure viewing.

Start from the task

What is the mass, pI and extinction coefficient of my protein?
Work out a protein’s properties
Which structure prediction tool should I use for my sequence?
Predict a protein structure
How similar are these two structures, and where do they differ?
Compare two protein structures

Recommended

Peptide analyser
Mass, isoelectric point, extinction coefficient and composition from a sequence.
Built inNo upload
Structure alignment
Superpose two structures and score how similar their folds are, with TM-score.
Built inNo upload
AlphaFold Server
Predicts protein, DNA, RNA and ligand complexes with AlphaFold 3.
ExternalGoogle DeepMindSign-in
ColabFold
AlphaFold2 and multimer predictions in a notebook, with no local GPU.
ExternalSteinegger & MirditaFree
I-TASSER
Threading-based modelling with function and ligand-site prediction.
ExternalZhang LabSign-in
CHARMM-GUI
Builds ready-to-run input files for molecular dynamics simulations.
ExternalLehigh UniversitySign-in
Mol* Viewer
Fast 3D structure viewing in the browser; the PDB default.
ExternalRCSB PDB / PDBeFree
RCSB PDB
The Protein Data Bank: every experimentally determined structure.
ExternalRCSBFree