PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 50%

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
19761212
19771123
1978326
1979228
1980331
1981738
19821856
1983763
19841174
1985983
1986891
19879100
198821121
198935156
199035191
199140231
199253284
1993166450
1994343793
19952841,077
19963151,392
19974711,863
19985662,429
19997443,173
20008564,029
20018824,911
20029305,841
200313407,181
200418729,053
2005210211,155
2006234213,497
2007255016,047
2008237718,424
2009243420,858
2010242823,286
2011219025,476
2012232727,803
2013245330,256
2014283433,090
2015249735,587
2016272938,316
2017286541,181
2018283844,019
2019308147,100
2020357950,679
2021300553,684
2022389157,575
2023376861,343
2024365064,993