PDB Statistics: Growth in Number of Unique Protein Sequences in Released PDB Structures (Cumulative) at Identity 95%

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
19771427
1978330
1979636
1980339
1981948
19821866
19831076
19841187
19851097
19869106
198710116
198824140
198945185
199047232
199155287
199266353
1993238591
19944851,076
19953721,448
19964161,864
19975762,440
19987693,209
19999664,175
200010805,255
200111136,368
200211817,549
200316749,223
2004228211,505
2005253914,044
2006288816,932
2007327120,203
2008303723,240
2009316526,405
2010316929,574
2011298432,558
2012316035,718
2013347039,188
2014425043,438
2015357347,011
2016410051,111
2017447555,586
2018424259,828
2019482664,654
2020565370,307
2021529975,606
2022633081,936
2023616088,096
2024461192,707