PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 70%

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
19761313
19771124
1978327
1979229
1980332
1981739
19821857
1983865
19841176
19851086
1986995
198710105
198822127
198938165
199036201
199144245
199254299
1993177476
1994370846
19953061152
19963371489
19975031992
19986312623
19998073430
20009234353
20019655318
200210346352
200314637815
200420419856
2005230912165
2006259514760
2007282617586
2008265620242
2009272222964
2010273625700
2011253028230
2012263130861
2013280033661
2014341237073
2015287839951
2016313543086
2017337746463
2018326349726
2019355853284
2020420157485
2021348360968
2022257263540