SYP71, a Plant-specific Qc-SNARE Protein, Reveals Dual Localization to the Plasma Membrane and the Endoplasmic Reticulum in Arabidopsis

Cell Structure and Function

I Nengah Suwastika¹  Masa H. Sato²  Kunio Takeyasu¹  Takashi Shiina²  Tomohiro Uemura³ 

[1] Graduate School of Biostudies, Kyoto University;Graduate School of Life and Environmental Sciences, Kyoto Prefectural University;Graduate School of Science, University of Tokyo

关键词: SNARE protein;    plasma membrane;    endoplasmic reticulum;    endosome;    membrane traffic;    Arabidopsis;   

DOI  :  10.1247/csf.08024

学科分类：分子生物学，细胞生物学和基因

来源: Japan Society for Cell Biology

【 摘 要 】

References(39)Cited-By(8)Supplementary materials(3)SNAREs (‘Soluble N-ethyl-maleimide sensitive factor attachment protein receptors’) play a critical role in the membrane fusion step of the vesicular transport system in eukaryotes. The number of the genes encoding SNARE proteins is estimated to be 64 in Arabidopsis thaliana. This number is much larger than those in other eukaryotes, suggesting a complex membrane trafficking in plants. The Arabidopsis SNAREs, the SYP7 group proteins, SYP71, SYP72, and SYP73, form a plant-specific SNARE subfamily with not-yet-identified functions. We have previously reported that the SYP7 subfamily proteins are predominantly localized to the endoplasmic reticulum in the Arabidopsis suspension cultured cells under transient expression condition. However, several proteomic analyzes indicated the plasma membrane localizations of one of SYP7 subfamily proteins, SYP71. In order to confirm the expression patterns and subcellular localization of SYP7, we performed combination analyses including promoter GUS analysis, a sucrose density gradient centrifugation analysis, as well as an observation on transgenic Arabidopsis plants expressing GFP-fused SYP71 under control of its native promoter. From these analyses, we concluded that one of the SYP7 subfamily proteins, SYP71, is predominantly expressed in all vegetative tissues and mainly localized to the plasma membrane. We also found that SYP71 is localized to the endoplasmic reticulum in the dividing cells of various types of tissues.

【 授权许可】

Unknown