ECERIFERUM11/C-TERMINAL DOMAIN PHOSPHATASE-LIKE2 Affects Secretory Trafficking  . Issue 3 (4th September 2019)

• Record Type: Journal Article
• Authors: Shi, Lin; Dean, Gillian H.; Zheng, Huanquan; Meents, Miranda J.; Haslam, Tegan M.; Haughn, George W.; Kunst, Ljerka
• Is Part Of: Plant physiology. Volume 181:Issue 3(2019)
• Page Start: 901
• Page End: 915
• Publication Date: 2019-09-04
• Subjects: Plant physiology -- Periodicals; Botany -- Periodicals; Periodicals; Electronic journals; 571.2
• DOI: 10.1104/pp.19.00722
• Languages: English
• ISSNs: 0032-0889

Abstract

Abstract : Secretion of cuticular wax and cell wall components in developing epidermal cells involves a dephosphorylation step catalyzed by ECERIFERUM11/CTD PHOSPHATASE LIKE2. Abstract: Secretory trafficking is highly conserved in all eukaryotic cells and is required for secretion of proteins as well as extracellular matrix components. In plants, the export of cuticular waxes and various cell wall components relies on secretory trafficking, but the molecular mechanisms underlying their secretion are not well understood. In this study, we characterize the Arabidopsis ( Arabidopsis thaliana ) dwarf eceriferum11 ( cer11 ) mutant and we show that it exhibits reduced stem cuticular wax deposition, aberrant seed coat mucilage extrusion, and delayed secondary cell wall columella formation, as well as a block in secretory GFP trafficking. Cloning of the CER11 gene revealed that it encodes a C-TERMINAL DOMAIN PHOSPHATASE-LIKE2 (CPL2) protein. Thus, secretory trafficking in plant cells in general, and secretion of extracellular matrix constituents in developing epidermal cells in particular, involves a dephosphorylation step catalyzed by CER11/CPL2.