|  | Class d: Alpha and beta proteins (a+b) [53931] (376 folds) | 
|  | Fold d.223: Polo-box domain [82614] (1 superfamily) beta(6)-alpha; antiparallel beta-sheet, meander | 
|  | Superfamily d.223.1: Polo-box domain [82615] (2 families)  Serine/threonine protein kinase-associated motif embedded in two distinct folds | 
|  | Family d.223.1.2: Polo-box duplicated region [102856] (1 protein) duplication: consists of two polo-box domains; binds phosphothreonine peptide | 
|  | Protein Serine/threonine-protein kinase plk C-terminal domain [102857] (1 species) | 
|  | Human (Homo sapiens) [TaxId:9606] [102858] (6 PDB entries) | 
|  | Domain d1q4ka1: 1q4k A:372-500 [95797] | 
|  | Domain d1q4ka2: 1q4k A:501-593 [95798] | 
|  | Domain d1q4kb1: 1q4k B:371-500 [95799] | 
|  | Domain d1q4kb2: 1q4k B:501-594 [95800] | 
|  | Domain d1q4kc1: 1q4k C:372-494 [95801] | 
|  | Domain d1q4kc2: 1q4k C:503-593 [95802] | 
|  | Domain d1q4oa1: 1q4o A:372-492 [95809] | 
|  | Domain d1q4oa2: 1q4o A:508-593 [95810] | 
|  | Domain d1q4ob1: 1q4o B:371-493 [95811] | 
|  | Domain d1q4ob2: 1q4o B:508-592 [95812] | 
|  | Domain d1umwa1: 1umw A:373-500 [99631] | 
|  | Domain d1umwa2: 1umw A:501-595 [99632] | 
|  | Domain d1umwb1: 1umw B:373-500 [99633] | 
|  | Domain d1umwb2: 1umw B:501-595 [99634] | 
|  | Domain d2ogqa1: 2ogq A:371-494 [139063] automatically matched to d1q4kb1 | 
|  | Domain d2ogqa2: 2ogq A:507-593 [139064] automatically matched to d1umwa2 | 
|  | Domain d2ojxa1: 2ojx A:373-488 [139118] automatically matched to d1q4kb1 | 
|  | Domain d2ojxa2: 2ojx A:507-593 [139119] automatically matched to d1umwa2 | 
|  | Domain d3bzia1: 3bzi A:371-500 [155775] automatically matched to d1q4kb1 complexed with fmt | 
|  | Domain d3bzia2: 3bzi A:501-593 [155776] automatically matched to d1umwa2 complexed with fmt | 
Timeline for Protein Serine/threonine-protein kinase plk C-terminal domain from d.223.1.2: Polo-box duplicated region: