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
19964161,864
19975762,440
19987683,208
19999664,174
200010805,254
200111136,367
200211817,548
200316749,222
2004228111,503
2005254114,044
2006288916,933
2007327220,205
2008303923,244
2009316326,407
2010316929,576
2011298632,562
2012316435,726
2013346939,195
2014425243,447
2015357947,026
2016407551,101
2017452655,627
2018418159,808
2019465264,460
2020573770,197
2021521275,409
2022633881,747
2023607687,823
2024320991,032