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
19987303,028
19999143,942
200010254,967
200110606,027
200211187,145
200315958,740
2004218910,929
2005246413,393
2006276916,162
2007313819,300
2008289422,194
2009299125,185
2010301428,199
2011281831,017
2012296733,984
2013325237,236
2014397141,207
2015334444,551
2016378048,331
2017408552,416
2018387356,289
2019434360,632
2020530965,941
2021484970,790
2022582076,610
2023562482,234
2024582188,055
2025364491,699