PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 95%

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
19771427
1978330
1979636
1980339
1981948
19821866
19831076
19841187
19851097
19869106
198710116
198824140
198945185
199047232
199155287
199266353
1993238591
19944851,076
19953721,448
19964151,863
19975782,441
19987683,209
19999664,175
200010785,253
200111126,365
200211797,544
200316709,214
2004228011,494
2005254214,036
2006288416,920
2007327420,194
2008303423,228
2009316026,388
2010316829,556
2011297932,535
2012316135,696
2013346839,164
2014424843,412
2015357246,984
2016409951,083
2017450555,588
2018424459,832
2019475064,582
2020562970,211
2021528775,498
2022626481,762
2023476786,529