Abstract
Among transport vesicle responsible for protein trafficking in eukaryotic cells, COPII coated vesicles mediate anterograde transport from endoplasmic reticulum (ER) to Golgi apparatus. The COPII coat complex is compose of small GTPase, Sar1 and 2 types of protein complexes (Sec23/Sec24 complex and Sec13/31 complex). Sec23/Sec24 contributes to recognition and sorting of specific cargo, and Sec13/Sec31 involve in concentration of cargo and curvature of ER membrane. We found that Sec31 homologue (ATSEC31A) affect development of guard cells and pollen in Arabidopsis thaliana. From these results, we started the study of another component of COPII, Sec23, in A. thaliana. Previously, we found there are 7 types of Sec23 homologue (ATSEC23) in Arabidopsis genome and determined the sites of gene expression and subcellular localization of their products. We also analyzed function of each ATSEC23 using knockout plants. Here, we report involvement of ATSEC23 in development of A.thaliana base on result of functional analysis.
