|  | Class a: All alpha proteins [46456] (284 folds) | 
|  | Fold a.118: alpha-alpha superhelix [48370] (24 superfamilies) multihelical; 2 (curved) layers: alpha/alpha; right-handed superhelix | 
|  | Superfamily a.118.1: ARM repeat [48371] (24 families)  | 
|  | Family a.118.1.22: GUN4-associated domain [140825] (2 proteins) PfamB PB089177 this is a repeat family; one repeat unit is 1z3x A:34-71 found in domain | 
|  | Protein Mg-chelatase cofactor Gun4 [140826] (1 species) Ycf53-like protein sll0558 | 
|  | Species Synechocystis sp. PCC 6803 [TaxId:1148] [140827] (1 PDB entry) Uniprot P72583 1-82 | 
|  | Domain d1y6ia1: 1y6i A:1-82 [122660] Other proteins in same PDB: d1y6ia2 | 
Timeline for Species Synechocystis sp. PCC 6803 [TaxId:1148] from a.118.1.22 Mg-chelatase cofactor Gun4: