PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 90%

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
19771225
1978328
1979533
1980336
1981844
19821862
19831072
19841183
19851093
19869102
198710112
198823135
198945180
199044224
199151275
199264339
1993225564
19944461,010
19953461,356
19963911,747
19975512,298
19987383,036
19999163,952
200010254,977
200110606,037
200211187,155
200315988,753
2004219110,944
2005246713,411
2006277116,182
2007314019,322
2008289722,219
2009299125,210
2010301828,228
2011282231,050
2012297034,020
2013325237,272
2014396941,241
2015334644,587
2016378148,368
2017411752,485
2018394456,429
2019434460,773
2020524066,013
2021485870,871
2022571576,586
2023556282,148
2024589888,046
2025408092,126