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
19944451,009
19953461,355
19963911,746
19975502,296
19987293,025
19999143,939
200010244,963
200110606,023
200211177,140
200315968,736
2004218910,925
2005246313,388
2006276716,155
2007313819,293
2008289422,187
2009299525,182
2010301128,193
2011282231,015
2012296833,983
2013324837,231
2014396841,199
2015333944,538
2016377048,308
2017410752,415
2018385956,274
2019432560,599
2020525365,852
2021481970,671
2022569376,364
2023558781,951
2024560787,558
2025137288,930