PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 95%

This chart shows the annual and cumulative numbers of protein sequences in released PDB structures. The chart can be viewed for a few different levels of sequence identity since the beginning of the PDB archive. The cumulative bars represent the growth in unique protein sequences (number of polymeric entities) across history. The yearly bars (dark blue) tell how many new protein sequences were added in a certain year.

Note: The total number of sequence clusters in the statistics table is linked to the sequence cluster group search result page. There is a default precision threshold in calculating the numbers for performance balance. So the statistics count may have a slight discrepancy compared to the actual non-redundant group search result when the result count approaches or goes above 10,000. The group search result page provides an accurate count. The statistics page provides the trend.

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Sequence cluster level:

YearNumber of New Protein SequencesTotal Number of Protein Sequences
19761313
19771427
1978330
1979636
1980339
1981948
19821866
19831076
19841187
19851097
19869106
198710116
198824140
198945185
199047232
199155287
199266353
1993240593
19944851,078
19953731,451
19964151,866
19975762,442
19987683,210
19999654,175
200010795,254
200111136,367
200211817,548
200316769,224
2004228311,507
2005254314,050
2006288816,938
2007327220,210
2008303623,246
2009316626,412
2010316929,581
2011298332,564
2012316635,730
2013347539,205
2014424843,453
2015357147,024
2016402451,048
2017441655,464
2018422159,685
2019477164,456
2020574570,201
2021536175,562
2022637081,932
2023616088,092
2024642194,513
2025298497,497