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
1993224563
19944451,008
19953481,356
19963971,753
19975502,303
19987283,031
19999133,944
200010234,967
200110586,025
200211167,141
200315928,733
2004218510,918
2005245913,377
2006277016,147
2007313919,286
2008289422,180
2009299025,170
2010301128,181
2011281730,998
2012296333,961
2013324137,202
2014397041,172
2015334644,518
2016377348,291
2017423552,526
2018386256,388
2019434960,737
2020528166,018
2021473670,754
2022573676,490
2023233078,820