PDB Statistics: Number of Unique Protein Sequences within Released PDB Structures (Annual) at Identity 70%

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.

Note: The number of unique sequences in the statistics table is linked to the sequence cluster 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 Unique Protein Sequences
197613
197713
19783
19795
19807
198110
198222
198316
198413
198518
198615
198715
198834
198951
199073
199183
199295
1993289
1994557
1995480
1996573
1997814
19981,053
19991,349
20001,488
20011,646
20021,790
20032,406
20043,046
20053,335
20063,744
20074,170
20084,120
20094,228
20104,304
20114,159
20124,494
20134,731
20145,638
20155,203
20165,775
20176,193
20186,276
20196,688
20207,726
20217,153
20228,355
20238,836
20249,118
20257,324