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
198940167
199040207
199146253
199255308
1993183491
1994376867
19953071,174
19963431,517
19974972,014
19986202,634
19997883,422
20009084,330
20019605,290
200210126,302
200314437,745
200419909,735
2005226211,997
2006249514,492
2007274917,241
2008258319,824
2009265722,481
2010264925,130
2011242327,553
2012256130,114
2013274932,863
2014325836,121
2015279638,917
2016305641,973
2017329045,263
2018315148,414
2019358351,997
2020412656,123
2021356859,691
2022442964,120
2023423768,357