1-Aminocyclopropane-1-carboxylic acid (ACC) is a disubstituted cyclic α-amino acid in which acyclopropane ring is fused to the Cα atom of the amino acid. It is a white solid. Many cyclopropane-substituted amino acids are known, but this one occurs naturally.[2][verification needed] Likeglycine, but unlike most α-amino acids, ACC is not chiral.
ACC also exhibits ethylene-independent signaling that plays a critical role inpollination and seed production by activating proteins similar to those involved in nervous system responses in humans and animals. More specifically, ACC signaling promotes secretion of thepollen tubechemoattractant LURE1.2 inovularsporophytic tissue thus enhancing pollen tube attraction. Additionally, ACC activatesCa2+-containingion currents viaglutamate receptor-like (GLR) channels in rootprotoplasts.[6]
^Brackmann F, de Meijere A (November 2007). "Natural Occurrence, Syntheses, and Applications of Cyclopropyl-Group-Containing α-Amino Acids. 1. 1-Aminocyclopropanecarboxylic Acid and Other 2,3-Methanoamino Acids".Chemical Reviews.107 (11):4493–4537.doi:10.1021/cr078376j.PMID17944521.
^Yang S, Hoffman N (1984). "Ethylene biosynthesis and its regulation in higher plants".Annu. Rev. Plant Physiol.35:155–189.doi:10.1146/annurev.pp.35.060184.001103.
^Nelson W, van Staden J (1985). "Aminocyclopropane-1-carboxylic acid in seaweed concentrate".Botanica Marina.28 (9): 415-417.doi:10.1515/botm.1985.28.9.415.