PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 30%

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
19761111
19771122
1978325
1979126
1980228
1981735
19821651
1983455
1984964
1985670
1986777
1987784
19881498
198923121
199026147
199132179
199242221
1993124345
1994253598
1995204802
19962371,039
19973371,376
19983901,766
19995282,294
20006292,923
20016243,547
20026494,196
20038615,057
200412736,330
200512757,605
200614439,048
2007158510,633
2008151612,149
2009150813,657
2010146015,117
2011125616,373
2012138917,762
2013142419,186
2014169520,881
2015151122,392
2016165624,048
2017176925,817
2018178827,605
2019185529,460
2020226931,729
2021182933,558
2022229235,850
2023221838,068
2024226640,334
2025101741,351