_EC 6.-.-.- Ligases. 3,414 PDB entries  
EC 6.-.-.-
Ligases.
The ligases catalyse the joining together of two molecules coupled with the hydrolysis of a pyrophosphate bond in ATP or a similar triphosphate. The bonds formed are often high-energy bonds.

The subclasses are defined according to the type of bond formed; the sub-subclasses are only used in the C-N ligases.

See also: [IUBMB] (Enzyme Nomenclature)

EC 6.-.-.- Ligases. [3,414 PDB entries]
EC 6.1.-.- Forming carbon-oxygen bonds. [1,220 PDB entries]
EC 6.2.-.- Forming carbon-sulfur bonds. [354 PDB entries]
EC 6.3.-.- Forming carbon-nitrogen bonds. [1,455 PDB entries]
EC 6.4.-.- Forming carbon-carbon bonds. [161 PDB entries]
EC 6.5.-.- Forming phosphoric ester bonds. [208 PDB entries]
EC 6.6.-.- Forming nitrogen-metal bonds. [16 PDB entries]
EC 6.7.-.- Forming nitrogen-nitrogen bonds. [-]

[-] signifies that there are no PDB entries for the given enzyme subclass