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
19974711,863
19985662,429
19997443,173
20008554,028
20018824,910
20029285,838
200313417,179
200418729,051
2005210211,153
2006234413,497
2007255216,049
2008237618,425
2009243220,857
2010242823,285
2011219025,475
2012232527,800
2013245330,253
2014283233,085
2015250235,587
2016272838,315
2017286541,180
2018284244,022
2019307547,097
2020362250,719
2021299353,712
2022384457,556
2023377761,333
2024352264,855