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
19997423,171
20008524,023
20018824,905
20029285,833
200313417,174
200418739,047
2005210211,149
2006234413,493
2007255316,046
2008237618,422
2009243020,852
2010242623,278
2011218925,467
2012233027,797
2013244430,241
2014283033,071
2015250335,574
2016272938,303
2017286241,165
2018284244,007
2019307447,081
2020364450,725
2021301353,738
2022387157,609
2023378461,393
2024263264,025