Table 1

The groups of protein structures found in the dataset, the number of families within each group and the number of PDB files each family contains


No. of proteins (PDB files) in group
Protein group
 No families in group
 Prokaryote
 Eukaryote
 Viral
 Total
1. Helix-turn-helix
 16 *
 32
 28
 -
 60
2. Zinc-coordinating
 4
 0
 23
 -
 23
3. Zipper-type
 2
 0
 10
 -
 10
4. Other a-helix
 7
 1
 5
 2
 8
5. ß-sheet
 1
 0
 8
 -
 8
6. ß-hairpin/ribbon
 6
 10
 1
 -
 11
7. Other
 2
 0
 8
 -
 8
8. Enzyme
 16
 43
 68
 2
 113
Total
 54
 86
 151
 4
 241 †

*Includes the two 'winged' helix-turn-helix families. †PDB entry 1a02 contains proteins belonging to the families 'zipper-type' and 'other'.

Luscombe et al. Genome Biology 2000 1:reviews001.1   doi:10.1186/gb-2000-1-1-reviews001