|  | Class c: Alpha and beta proteins (a/b) [51349] (136 folds) | 
|  | Fold c.72: Ribokinase-like [53612] (3 superfamilies) core: 3 layers: a/b/a; mixed beta-sheet of 8 strands, order 21345678, strand 7 is antiparallel to the rest potential superfamily: members of this fold have similar functions but different ATP-binding sites | 
|  | Superfamily c.72.2: MurD-like peptide ligases, catalytic domain [53623] (2 families)  has extra strand located between strands 1 and 2 | 
|  | Family c.72.2.1: MurCDEF [53624] (4 proteins) | 
|  | Protein UDP-murNac-tripeptide D-alanyl-D-alanine-adding enzyme MurF [53627] (1 species) | 
|  | Escherichia coli [TaxId:562] [53628] (1 PDB entry) | 
Timeline for Protein UDP-murNac-tripeptide D-alanyl-D-alanine-adding enzyme MurF from c.72.2.1: MurCDEF: