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
19851084
1986892
19879101
198821122
198936158
199036194
199140234
199253287
1993166453
1994343796
19952841,080
19963151,395
19974711,866
19985662,432
19997433,175
20008524,027
20018834,910
20029295,839
200313417,180
200418709,050
2005209811,148
2006234213,490
2007255016,040
2008237918,419
2009243420,853
2010242823,281
2011219325,474
2012233027,804
2013243930,243
2014282733,070
2015249535,565
2016272738,292
2017285741,149
2018283543,984
2019306947,053
2020352750,580
2021306553,645
2022382457,469
2023298760,456