PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 70%

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
19771124
1978327
1979229
1980332
1981739
19821857
1983865
19841176
1985985
1986994
19879103
198822125
198938163
199036199
199143242
199254296
1993179475
1994367842
19953081,150
19963411,491
19975071,998
19986252,623
19998083,431
20009254,356
20019635,319
200210386,357
200314607,817
200420399,856
2005231512,171
2006260314,774
2007283317,607
2008265520,262
2009273422,996
2010273725,733
2011252828,261
2012262630,887
2013278433,671
2014341637,087
2015286339,950
2016313843,088
2017336746,455
2018327849,733
2019360453,337
2020420157,538
2021350761,045
2022374164,786