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
2004219010,926
2005246413,390
2006276916,159
2007313819,297
2008289322,190
2009299225,182
2010301128,193
2011281631,009
2012296733,976
2013325137,227
2014397141,198
2015333644,534
2016376948,303
2017413452,437
2018388256,319
2019436760,686
2020523965,925
2021476170,686
2022576476,450
2023558782,037
2024566787,704
2025205089,754