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.

Chart is currently loading

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
198936157
199036193
199140233
199253286
1993166452
1994343795
19952841,079
19963141,393
19974711,864
19985682,432
19997443,176
20008544,030
20018784,908
20029275,835
200313417,176
200418709,046
2005210211,148
2006234113,489
2007255416,043
2008237418,417
2009243520,852
2010242723,279
2011218525,464
2012233327,797
2013245130,248
2014282933,077
2015250535,582
2016273938,321
2017286541,186
2018285944,045
2019309047,135
2020372650,861
2021309953,960
2022387157,831
2023372461,555
2024379765,352
2025235467,706