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
20019585,296
200210146,310
200314417,751
200419969,747
2005226212,009
2006249914,508
2007275517,263
2008258219,845
2009265422,499
2010265925,158
2011241627,574
2012255830,132
2013274132,873
2014326736,140
2015280138,941
2016306042,001
2017329445,295
2018318248,477
2019333451,811
2020416055,971
2021358759,558
2022440763,965
2023433668,301
2024436172,662
2025292275,584