title: A glycopeptide regulating stem cell fate in Arabidopsis thaliana.
abstract: The secreted peptide gene CLAVATA3 (CLV3) regulates stem cell fate in the shoot apical meristem in Arabidopsis thaliana plants, but the molecular structure of the active mature CLV3 peptide is controversial. Here, using nano-LC-MS/MS analysis of apoplastic peptides of A. thaliana plants overexpressing CLV3, we show that CLV3 is a 13-amino-acid arabinosylated glycopeptide. Post-translational arabinosylation of CLV3 is critical for its biological activity and high-affinity binding to its receptor CLV1.
authors.affiliation: Graduate School of Bio-Agricultural Sciences, Nagoya University, Chikusa, Nagoya, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Ohyama
authors.forename: Hidefumi
authors.initials: H
authors.lastname: Shinohara
authors.forename: Mari
authors.initials: M
authors.lastname: Ogawa-Ohnishi
authors.forename: Yoshikatsu
authors.initials: Y
authors.lastname: Matsubayashi
mesh_terms: D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000254:growth & development* / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000737:chemistry / Q000235:genetics / Q000502:physiology*; D002853:Chromatography, Liquid; D017343:Genes, Plant; D006020:Glycopeptides / Q000737:chemistry / Q000235:genetics / Q000502:physiology*; D013058:Mass Spectrometry; D018519:Meristem / Q000254:growth & development* / Q000378:metabolism; D008969:Molecular Sequence Data; D018520:Plant Shoots / Q000254:growth & development / Q000378:metabolism; D011485:Protein Binding; D011499:Protein Processing, Post-Translational; D017346:Protein Serine-Threonine Kinases; D017434:Protein Structure, Tertiary; D020794:Receptor Protein-Tyrosine Kinases / Q000737:chemistry / Q000235:genetics / Q000502:physiology*
chemical_list: C118167:AT2G27250 protein, Arabidopsis; D029681:Arabidopsis Proteins; D006020:Glycopeptides; D020794:Receptor Protein-Tyrosine Kinases; C118166:CLV1 protein, Arabidopsis; D017346:Protein Serine-Threonine Kinases