Contributes to jasmonic acid biosynthesis by initiating the beta-oxidative chain shortening of its precursors (PubMed:15677481, PubMed:18267944). Converts 12-oxo-phytodienoic acid (OPDA) into OPDA-CoA (PubMed:15677481, PubMed:18267944). ATP + CoA + hexadecanoate = AMP + diphosphate + hexadecanoyl-CoA (9Z)-octadecenoate + ATP + CoA = (9Z)-octadecenoyl-CoA + AMP + diphosphate ATP + CoA + octadecanoate = AMP + diphosphate + octadecanoyl-CoA ATP + CoA + tetradecanoate = AMP + diphosphate + tetradecanoyl-CoA ATP + CoA + dodecanoate = AMP + diphosphate + dodecanoyl-CoA ATP + CoA + decanoate = AMP + decanoyl-CoA + diphosphate ATP + CoA + octanoate = AMP + diphosphate + octanoyl-CoA (9Z,12Z)-octadecadienoate + ATP + CoA = (9Z,12Z)-octadecadienoyl-CoA + AMP + diphosphate (9Z,12Z,15Z)-octadecatrienoate + ATP + CoA = (9Z,12Z,15Z)-octadecatrienoyl-CoA + AMP + diphosphate (10Z,15Z)-12-oxophytodienoate + ATP + CoA = (10Z,15Z)-12-oxophytodienoyl-CoA + AMP + diphosphate ATP + CoA + nonanoate = AMP + diphosphate + nonanoyl-CoA kcat is 2 sec(-1) with tetradecanoic acid as substrate (PubMed:15677481, PubMed:18267944). kcat is 2.62 sec(-1) with OPDA as substrate (PubMed:15677481, PubMed:18267944). kcat is 19.87 sec(-1) with nonanoic acid as substrate (PubMed:15677481, PubMed:18267944). kcat is 2.79 sec(-1) with hexanoic acid as substrate (PubMed:15677481, PubMed:18267944). Expressed at low level in leaves. Both substrate-binding domains (SBD1 and SBD2) are involved in the substrate recognition, and are sufficient to confer the substrate specificity. No obvious phenotype in growth, root and flower development, fertility, reproduction and morphology. Belongs to the ATP-dependent AMP-binding enzyme family.