ECODEvolutionary Classification of Protein Domains

Home Browse Search Download Help

About ECOD

ECOD (Evolutionary Classification of Protein Domains) is a hierarchical classification of protein domains based on evolutionary relationships. It combines automated sequence and structure analysis with manual curation.

Quick Links

Browse Classification
Search
Download Data
Documentation

Resources

Grishin Lab
UT Southwestern
RCSB PDB
AlphaFold DB
ecod.database@gmail.com

© 2014-2026 Grishin Lab / HHMI / UTSW

Advanced Search

Filter domains by taxonomy, structure source, and classification

Superkingdom

Structure Source

All structuresPDB (experimental)AlphaFold (predicted)

Keyword

ECOD Classification

Ligand (PDB CCD code)

Restricts to domains within 4 Å of this ligand.

How to use Advanced Search

1. Select one or more superkingdoms to filter by taxonomy
2. Optionally narrow down with phylum, class, order, family, or genus
3. Filter by structure source (PDB experimental or AlphaFold predicted)
4. Add a keyword to search protein or organism names
5. Optionally filter by ECOD classification (e.g., "1.1" for X-group)
6. Click Search to find matching domains