Ett enzym som katalyserar bildandet av 10-formyltetrahydrofolat från format och tetrahydrofolat i närvaro av ATP. Enzymet har påvisats i levern hos duvor, erytrocyter hos människa och vissa mikroorganismer. EC 6.3.4.3.

Ubiquitin-protein ligases are enzymes that play a crucial role in the ubiquitination process, which is a post-translational modification of proteins. This process involves the covalent attachment of the protein ubiquitin to specific lysine residues on target proteins, thereby marking them for degradation or altering their function, localization, or interaction with other proteins. Ubiquitin-protein ligases catalyze the transfer of ubiquitin from an E2 ubiquitin-conjugating enzyme to the target protein, forming an isopeptide bond between ubiquitin and the target protein. There are several classes of ubiquitin-protein ligases, including HECT (Homologous to the E6-AP Carboxyl Terminus), RING (Really Interesting New Gene), and U-box ligases, which differ in their mechanisms of catalyzing ubiquitination. Dysregulation of ubiquitin-protein ligases has been implicated in various diseases, including cancer, neurodegenerative disorders, and inflammatory conditions.

Poly(deoxiribonukleotid):poly(deoxiribonukleotid)-ligaser. Enzymer som katalyserar hopkopplingen av redan bildade deoxiribonukleotider med fosfodiesterlänkning vid genetiska processer i samband med reparation av enkelsträngsbrott i duplex-DNA. EC 6.5.1.1 (ATP) och EC 6.5.1.2 (NAD).