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
19851086
1986995
198710105
198822127
198939166
199040206
199146252
199256308
1993184492
1994373865
19953071,172
19963421,514
19974962,010
19986242,634
19997933,427
20009114,338
20019595,297
200210136,310
200314427,752
200419969,748
2005226412,012
2006249814,510
2007275717,267
2008258119,848
2009265522,503
2010265525,158
2011241327,571
2012255830,129
2013274532,874
2014327136,145
2015279938,944
2016306542,009
2017329645,305
2018318448,489
2019346151,950
2020422456,174
2021357759,751
2022441664,167
2023435668,523
2024438172,904
2025264675,550