| Description | Systemin acetate is an 18-amino acid polypeptide with the sequence AVQSKPPSKRDPPKMQTD that is found in Solanaceae plants (such as tomato and potato). |
| In vitro | Systemin从伤口处迅速传输，被认为是主要的系统性信号。介导Systemin信号传导的途径包括从膜中释放亚油酸并随后转化为茉莉酸，一个强效的防御基因转录激活剂。此途径与动物的花生四烯酸/前列腺素信号传导有类似之处，后者导致炎症反应和急性期反应[1]。Systemin是一个由18个氨基酸组成的肽信号分子，从一个由200个氨基酸组成的前体蛋白（称为proSystemin）的C-末端区域裂解而来。在克隆了代表番茄基因组单一位点的proSystemin基因后，几条遗传学证据表明Systemin作为伤口诱导信号级联的上游组分，引导防御基因表达[2]。 |
| molecular weight | 2070.35 |
| Molecular formula | C87H148N26O30S |
| Storage | keep away from moisture | Powder: -20°C for 3 years | In solvent: -80°C for 1 year |
| Solubility | DMSO: 10 mM |
| References | 1. Ryan CA, et al. Systemin: a polypeptide signal for plant defensive genes. Annu Rev Cell Dev Biol. 1998;14:1-17. |