Activation of long-chain fatty acids for both synthesis of cellular lipids, and degradation via beta-oxidation. Acts in the cutin pathway. Preferentially uses palmitate, palmitoleate, oleate and linoleate. Required for repression of lateral root formation through its role in cutin biosynthesis and subsequent aerial tissues permeability. a long-chain fatty acid + ATP + CoA = a long-chain fatty acyl-CoA + AMP + diphosphate Lipid metabolism; fatty acid metabolism. Expressed along the entire length of the stem, but expression was not entirely epidermal specific, with some expression found in internal cell layers as well. Was expressed in leave epidermal cells, flowers (sepals, petals, stamens, filaments and carpel), siliques and developing seeds. In roots, expression was detected in an internal cell layer, probably the endodermal layer. Positively regulated by WIN1. Dwarf phenotype with smaller, wrinkled leaves and overall reduced vigor. Higher water loss rate and susceptibility to drought stress. Defective in the cuticular membrane. Strong resistance to virulent Botrytis cinerea and enhanced susceptibility to avirulent Pseudomonas syringae. Belongs to the ATP-dependent AMP-binding enzyme family.