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
19999143,950
200010254,975
200110606,035
200211187,153
200315988,751
2004218910,940
2005246713,407
2006277216,179
2007313819,317
2008289822,215
2009299125,206
2010301828,224
2011282031,044
2012297034,014
2013324837,262
2014396841,230
2015334544,575
2016378548,360
2017414352,503
2018389356,396
2019432360,719
2020526765,986
2021484870,834
2022577276,606
2023562382,229
2024580788,036
2025398992,025