[3dem] Extension to EMDB Accession Codes

[Justin Flatt]

The EMDB archive is experiencing near-exponential growth. To support 
this rapid expansion, the wwPDB has been working to prepare our systems 
for the future and ensure seamless deposition, validation, and 
dissemination of data in the years ahead.

As part of this effort, we are announcing an important change:

EMDB IDs will be extended to support up to six digits, allowing for 
identifiers such as EMD-123456. Currently, the archive uses four and 
five-digit IDs (e.g., EMD-0123, EMD-45678), with support for identifiers 
up to the EMDB ID: EMD-99999. The change to six-digits will increase our 
capacity ten-fold and ensure ID availability into the next decade, up to 
EMD-999999.

We do not anticipate surpassing 99,999 released entries until around 
2028, however, we expect to begin assigning six-digit EMDB IDs sometime 
in 2026. As such, as early as 2026, depositors should anticipate being 
assigned six-digit IDs within the wwPDB OneDep deposition system, and 
the user and developer community can expect six-digit EMDB IDs in the 
EMDB archive.

We appreciate your support as the archive grows and thank you for your 
contribution to the worldwide effort to archive structural biology data. 
We remain committed to ensuring a stable, sustainable and scalable 
infrastructure that supports the continued successes and productivity of 
the scientific community using structural biology and cryoEM in their 
research. For questions or feedback, contact the EMDB team at 
emdbhelp at ebi.ac.uk.
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