Arabinogalactan protein cluster from Jatropha curcas seed embryo contains fasciclin, xylogen and LysM proteins

作者：Sehlbach Maria; Koenig Simone; Mormann Michael; Sendker Jandirk; Hensel Andreas^*

来源：Carbohydrate Polymers, 2013, 98(1): 522-531.

DOI：10.1016/j.carbpol.2013.06.003

• Jatropha curcas L.
• Arabinogalactan proteins
• Fasciclin
• Xylogen
• LysM
• N-/O-glycosylation

An non-GPI-anchored AGP cluster (Y2) was isolated from the seeds of Jatropha curcas L (Euphorbiaceae) composed of 4.8% polypeptides (mainly Ala, Ser, Gly, Hyp, Glu) and a carbohydrate moiety composed of Gal, Ara, GlcA, Rha, Man and GlcN. Besides the typical structural features of arabinogalactan proteins, typical N-glycan linker of the complex type (GIcNAc(4)Man(3)Gal(2)Fuc(1)Xyl(1)) were identified. O-glycosylation occurred mainly via Hyp and to a lesser extent via Thr and Ser. N-glycans from the complex type, carrying at the innermost GlcNAc at position O-3 one alpha-Fuc-residue, were also present. %26lt;br%26gt;MS analysis of the tryptic digest assigned peptides of three major protein groups: fasciclin-like arabinogalactan proteins, xylogen-like proteins and LysM domain-containing proteins. They could not be separated further and it is indicated that various homologous protein forms co-exist. Histological investigation off. curcas seeds revealed the presence of AGPs in the vessels of cotyledons and in the procambium ring of the embryo.

• 出版日期2013-10-15