关键词: Fibrillin家族, 起源, 基序, 基因功能

Abstract:

Plastid is an important organelle for photosynthesis and storing organic matter in plant cells. Fibrillins are the nuclear gene-encoding plastid lipid\|binding proteins originated from cyanobacteria and are prevalent in plastids of plants. Their molecular weight and pI are 21~42 kDa and 4~9, respectively. The sequence of fibrillins contains amino\|terminal transit peptides, lipid\|binding motif DLDKLQGKWRLLY, cellular adhesion motif RGD, and a protein kinase C domain. Previous reports have showed that fibrillins can improve the structural stability of plasmids under adverse environmental stresses, regulate the biosynthesis of plastoquinone (PQ), triacylglycerol (TAG) and jasmonic acid (JA), mediate the stress hormone abscisic acid (ABA) signal transduction pathways in the stress tolerance, and more importantly in plant growth, development and stress tolerance. In this study, fibrillin family genes have been reviewed in their protein structure and genetic functions in higher plants. The future key issues and research directions in this field have also been proposed.

Key words: fibrillin protein family, origin, motif, gene function