Systemin是一种18个氨基酸的多肽，从番茄叶子中分离出来，可诱导产生超过15种防御基因。
CAS：137181-56-7
分子式：C85H144N26O28S
分子量：2010.28
纯度：98%
存储：Store at -20°C

Background:

Systemin, an 18-amino acid polypeptide, has been isolated from tomato leaves that is a powerful inducer of over 15 defensive genes.

Systemin is readily transported from wound sites and is considered to be the primary systemic signal.The signal transduction pathway that mediates Systemin signaling involves linolenic acid release from membranes and subsequent conversion to jasmonic acid, a potent activator of defense gene transcription. The pathway exhibits analogies to arachidonic acid/prostaglandin signaling in animals that leads to inflammatory and acute phase responses[1]. Systemin, an 18-amino-acid peptide signal. Systemin is cleaved from the C-terminal region of a 200-amino acid precursor protein called proSystemin. Following the cloning of proSystemin gene, which represents a single locus in the tomato genome, several lines of genetic evidence indicate that Systemin acts as an upstream component of wound-induced signaling cascades leading to defense gene expression[2].

[1]. Ryan CA, et al. Systemin: a polypeptide signal for plant defensive genes. Annu Rev Cell Dev Biol. 1998;14:1-17. [2]. Sun JQ, et al. Systemin/Jasmonate-mediated systemic defense signaling in tomato. Mol Plant. 2011 Jul;4(4):607-15.