EMDB Database

Overview

The Electron Microscopy Data Bank (EMDB) at EBI archives 3D electron microscopy density maps — primarily cryo-EM and cryo-ET — for macromolecular assemblies (30,000+ entries: ribosomes, membrane proteins, viruses, large complexes). Access is split across two services:

• EMDB Entry API (https://www.ebi.ac.uk/emdb/api/entry/{EMD-XXXXX}) — the canonical per-entry JSON containing metadata, map header, fitted PDB list, and citation. Sub-endpoints like /map, /fitted, /publications do not exist — all those data live inside the single entry response.
• EBI Search WS (https://www.ebi.ac.uk/ebisearch/ws/rest/emdb) — the real keyword search backend (the bare https://www.ebi.ac.uk/emdb/api/search/ endpoint ignores the query and just returns recent entries).

No authentication or API key is required.

When to Use