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
1993240593
19944851,078
19953731,451
19964151,866
19975762,442
19987683,210
19999644,174
200010795,253
200111136,366
200211817,547
200316779,224
2004228311,507
2005254314,050
2006288616,936
2007327320,209
2008303723,246
2009316326,409
2010317129,580
2011298332,563
2012316235,725
2013347239,197
2014425043,447
2015357547,022
2016410151,123
2017453155,654
2018424659,900
2019478364,683
2020576570,448
2021540475,852
2022630082,152
2023615388,305
2024638994,694
2025421798,911