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
19851084
1986892
19879101
198821122
198936158
199036194
199140234
199253287
1993166453
1994343796
19952841,080
19963151,395
19974711,866
19985662,432
19997433,175
20008534,028
20018824,910
20029295,839
200313407,179
200418709,049
2005209811,147
2006234313,490
2007255216,042
2008238118,423
2009243120,854
2010242823,282
2011219125,473
2012233227,805
2013244030,245
2014282833,073
2015250035,573
2016272438,297
2017285841,155
2018283543,990
2019307347,063
2020363150,694
2021299153,685
2022383057,515
2023374961,264
202461261,876