PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 30%

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
19761111
19771122
1978325
1979126
1980228
1981735
19821651
1983455
1984964
1985670
1986777
1987784
19881498
198922120
199026146
199132178
199241219
1993124343
1994251594
1995205799
19962371,036
19973371,373
19983901,763
19995272,290
20006312,921
20016253,546
20026524,198
20038625,060
200412746,334
200512777,611
200614419,052
2007158310,635
2008151512,150
2009150913,659
2010146215,121
2011125616,377
2012138817,765
2013142819,193
2014169820,891
2015151122,402
2016165424,056
2017176925,825
2018178427,609
2019185829,467
2020226231,729
2021183733,566
2022229635,862
2023222638,088
2024185639,944