Involved in the biosynthesis of floral volatile benzenoid/phenylpropanoid (FVBP) scent (e.g. benzylbenzoate, phenylethylbenzoate, and methylbenzoate) (PubMed:22771854, PubMed:22649270). Catalyzes the formation of CoA esters of cinnamic acid, and, with lower efficiency, of 4-coumaric acid and caffeic acid (PubMed:22649270). (E)-4-coumarate + ATP + CoA = (E)-4-coumaroyl-CoA + AMP + diphosphate (E)-caffeate + ATP + CoA = (E)-caffeoyl-CoA + AMP + diphosphate (E)-cinnamate + ATP + CoA = (E)-cinnamoyl-CoA + AMP + diphosphate kcat is 0.472 sec(-1) with trans-cinnamic acid as substrate (PubMed:22649270). kcat is 0.248 sec(-1) with 4-coumaric acid as substrate (PubMed:22649270). kcat is 0.238 sec(-1) with caffeic acid as substrate (PubMed:22649270). kcat is 0.458 sec(-1) with CoA as substrate (PubMed:22649270). Optimum pH is 8 with cinnamic acid as a substrate. Phenylpropanoid metabolism; trans-cinnamate biosynthesis. Phytoalexin biosynthesis; 3,4',5-trihydroxystilbene biosynthesis; 3,4',5-trihydroxystilbene from trans-4-coumarate: step 1/2. Monomer. Located in the peroxisomes of flower petal limb cells. Mostly expressed in flower organs, with highest levels in corollas and petal limbs, and, to a lesser extent, in petal tubes, sepals, pistils, stamen, stigma, anthers and ovaries (PubMed:22771854, PubMed:22649270). Also present at low levels in leaves, stems and roots (PubMed:22771854, PubMed:22649270). Accumulates during flower development with highest levels in open flowers, and fades out as flowers are senescing. Circadian-regulation with peak levels occurring late afternoon (e.g. 3 to 7 pm) (PubMed:22649270). Repressed by ethylene, especially in senescing flowers (PubMed:22771854). Disturbed benzenoid scent profile in flowers characterized by a decreased emission of benzylbenzoate, phenylethylbenzoate, and methylbenzoate. Belongs to the ATP-dependent AMP-binding enzyme family.