Stacey Gary, Koh Serry, Granger Cheryl, Becker Jeffrey M
Dept of Plant Microbiology and Pathology, University of Missouri, Columbia, MO 65211, USA.
Trends Plant Sci. 2002 Jun;7(6):257-63. doi: 10.1016/s1360-1385(02)02249-5.
Recent completion of the Arabidopsis genome revealed that this organism has ten times more peptide transporters than any other sequenced organism (prokaryote or eukaryote). These transporters are found in three protein families: the ABC-type transporters; the di- and tripeptide transporters; and the newly described tetra- and pentapeptide oligopetide transporters. The abundance of these transporters suggests that they play diverse and important roles in plant growth and development. Possible substrates for these transporters include glutathione, gamma-glutamyl peptides, hormone-amino acid conjugates, phytosulfokine, peptide-like compounds and peptide phytotoxins. However, the exact role of peptide transport in plants is still undefined.
拟南芥基因组测序的近期完成表明，该生物体的肽转运蛋白数量比任何其他已测序生物（原核生物或真核生物）多十倍。这些转运蛋白存在于三个蛋白质家族中：ABC型转运蛋白；二肽和三肽转运蛋白；以及新描述的四肽和五肽寡肽转运蛋白。这些转运蛋白的丰富性表明它们在植物生长和发育中发挥着多样且重要的作用。这些转运蛋白的可能底物包括谷胱甘肽、γ-谷氨酰肽、激素-氨基酸共轭物、植物磺肽素、肽样化合物和肽类植物毒素。然而，肽转运在植物中的具体作用仍不明确。
