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
1985569
1986776
1987783
19881497
198924121
199026147
199132179
199242221
1993125346
1994253599
1995205804
19962371,041
19973361,377
19983921,769
19995282,297
20006292,926
20016243,550
20026484,198
20038635,061
200412736,334
200512757,609
200614449,053
2007158510,638
2008151612,154
2009150713,661
2010146015,121
2011125716,378
2012139017,768
2013142619,194
2014169020,884
2015151122,395
2016166824,063
2017177025,833
2018180327,636
2019186729,503
2020228431,787
2021185333,640
2022228935,929
2023220438,133
2024233140,464
2025153541,999