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Table 2 Comparison between different sources of mappings.

From: SSMap: A new UniProt-PDB mapping resource for the curation of structural-related information in the UniProt/Swiss-Prot Knowledgebase

Reference source

SSMap

  

Compared source

SIFTS

PDBSWS

DR PDB

1. Common

72,543

(80%)

78,178

(85%)

68,692

(78%)

2. Alternative

5,548

(6%)

7,736

(8%)

4,155

(5%)

3. New

12,959

(14%)

5,143

(7%)

18,472

(17%)

4. Missing

5,931 [5,733]

7,147 [7,003]

5,362 [5,206]

  1. SSMap was taken as the reference dataset. The number indicated the number of mappings and the percentage was calculated based on the total number of mappings (91,050) in SSMap. 1) Common: mappings (AC, PDB chain) common in both datasets being compared. 2) Alternative: mappings in which a PDB chain was mapped to different UniProtKB entries in the compared sources. 3) New: mappings in SSMap. The PDB chain was not mapped in the compared database. 4) Missing: mappings that were missing in SSMap. The total number of mappings that were found as ambiguous/unsure mappings in SSMap was indicated between brackets.
  2. NB: The sum of common, alternative and new mappings was not exactly equal to the total number of mappings in SSMap because of the fusion protein cases. Some mappings were counted twice in different categories.