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.

Chart is currently loading

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
19987693,211
19999644,175
200010795,254
200111136,367
200211817,548
200316779,225
2004228311,508
2005254214,050
2006288816,938
2007327220,210
2008304023,250
2009316626,416
2010317229,588
2011298532,573
2012316135,734
2013347539,209
2014424543,454
2015357447,028
2016404351,071
2017449555,566
2018424359,809
2019483664,645
2020574770,392
2021533375,725
2022636582,090
2023606688,156
2024648594,641
2025387898,519