Functional characterisation of a putative rhamnogalacturonan II specific xylosyltransferase

Jack Egelund Madsen, Iben Damager, Kirsten Faber, C Erik Olsen, Peter Ulvskov, Bent Larsen Petersen

33 Citationer (Scopus)

Abstract

An Arabidopsis thaliana gene, At1g56550, was expressed in Pichia pastoris and the recombinant protein was shown to catalyse transfer of d-xylose from UDP-alpha-d-xylose onto methyl alpha-l-fucoside. The product formed was shown by 1D and 2D (1)H NMR spectroscopy to be Me alpha-d-Xyl-(1,3)-alpha-l-Fuc, which is identical to the proposed target structure in the A-chain of rhamnogalacturonan II. Chemically synthesized methyl l-fucosides derivatized by methyl groups on either the 2-, 3- or 4 position were tested as acceptor substrates but only methyl 4-O-methyl-alpha-l-fucopyranoside acted as an acceptor, although to a lesser extent than methyl alpha-l-fucoside. At1g56550 is suggested to encode a rhamnogalacturonan II specific xylosyltransferase.
OriginalsprogEngelsk
TidsskriftFEBS Letters
Vol/bind582
Udgave nummer21-22
Sider (fra-til)3217-3222
Antal sider6
ISSN0014-5793
DOI
StatusUdgivet - 2008

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