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
1993376858
19947101,568
19955222,090
19965852,675
19978063,481
199811684,649
199913626,011
200015007,511
200115779,088
2002163910,727
2003229613,023
2004305216,075
2005324619,321
2006377923,100
2007436927,469
2008406831,537
2009426435,801
2010445940,260
2011437044,630
2012466149,291
2013522954,520
2014602560,545
2015532265,867
2016609971,966
2017634878,314
2018616484,478
2019687191,349
2020807999,428
20217437106,865
20228901115,766
20238639124,405
20248801133,206