PDB Statistics: Number of Unique Protein Sequence Clusters within Released PDB Structures (Annual) at identity 95%

This chart shows the total number of unique protein sequence clusters in PDB structures released within each year. Unique sequence clusters are defined using the sequence identity (SI). A value of 95% SI is used by default, since for practical purposes this identifies proteins with few differences, and thus can be considered to be the same sequence. The chart can also be redrawn with a more stringent 100% SI criterion, or with lower SI values that identify unique protein families (70% SI) or unique protein folds (30% SI).
The annual numbers of protein sequences may be displayed by specific levels of SI, either separately in different charts or simultaneously in the same chart.

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Sequence cluster level:

YearNumber of Unique Protein Sequence Clusters within Released PDB Structures (Annual)
197613
197715
19783
19797
19808
198111
198223
198319
198414
198518
198615
198717
198835
198958
199075
199186
199299
1993325
1994660
1995555
1996634
1997909
19981205
19991546
20001678
20011806
20021976
20032662
20043366
20053702
20064196
20074686
20084587
20094776
20104882
20114782
20125114
20135545
20146750
20156334
20166923
20177685
20187672
20198432
20209762
20214970