Journal
PLANT PHYSIOLOGY
Volume 142, Issue 2, Pages 458-470Publisher
AMER SOC PLANT BIOLOGISTS
DOI: 10.1104/pp.106.084244
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A series of gene constructs encoding synthetic glycomodule peptides with N-terminal signal sequences and C-terminal green fluorescent proteins were expressed in transgenic Arabidopsis (Arabidopsis thaliana) under the control of the 35S promoter. The synthetic glycomodule peptides were composed of repetitive proline-containing motifs that have been previously found to be substrates for prolyl hydroxylases and subsequent O-glycosylation of the hydroxyproline residues. All of the constructs were secreted in aerial tissues, but not in roots. The amount of hydroxylation and glycosylation of the various constructs varied depending on the tissue. Also, accumulation of the proteins exhibited a high degree of cell-type specificity within various tissues due to posttranscriptional effects. The observations reveal a high level of complexity in the synthesis, secretion, and turnover of the glycoproteins.
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