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
1986894
198710104
198822126
198940166
199040206
199146252
199256308
1993184492
1994373865
19953071,172
19963421,514
19974972,011
19986242,635
19997933,428
20009114,339
20019585,297
200210126,309
200314417,750
200419949,744
2005226312,007
2006250014,507
2007275617,263
2008258219,845
2009265722,502
2010265325,155
2011241627,571
2012255630,127
2013275032,877
2014326736,144
2015280238,946
2016304941,995
2017329245,287
2018315648,443
2019344851,891
2020412356,014
2021356459,578
2022443364,011
2023433168,342
2024429672,638
2025161174,249