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
19974701,862
19985672,429
19997433,172
20008544,026
20018824,908
20029285,836
200313397,175
200418709,045
2005209811,143
2006234113,484
2007255116,035
2008238218,417
2009243220,849
2010243123,280
2011218925,469
2012232927,798
2013244130,239
2014283033,069
2015250035,569
2016272638,295
2017286241,157
2018283443,991
2019307347,064
2020361550,679
2021301753,696
2022384957,545
2023376561,310
202485962,169