PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 100%

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
1980440
19811050
19821969
19831483
19841295
198510105
19869114
198710124
198842166
198948214
199077291
1991103394
199288482
1993377859
19947111,570
19955232,093
19965852,678
19978043,482
199811664,648
199913576,005
200014977,502
200115779,079
2002163910,718
2003229513,013
2004305116,064
2005324119,305
2006377923,084
2007436527,449
2008407131,520
2009427535,795
2010446440,259
2011437844,637
2012468949,326
2013509454,420
2014604360,463
2015527165,734
2016612471,858
2017631678,174
2018611084,284
2019687491,158
2020806799,225
20217530106,755
20228814115,569
20238200123,769