Three Arabidopsis DUF579 domain-containing GXM proteins are methyltransferases catalyzing 4-o-methylation of glucuronic acid on xylan.

Abstract excerpt

Xylan is made of a linear chain of β-1,4-linked xylosyl residues, some of which are substituted with side chains, such as glucuronic acid (GlcA), methylglucuronic acid (MeGlcA) and arabinose, depending on the source of xylan. Although past studies have revealed a number of genes involved in the elongation of the xylan backbone and the addition of GlcA and arabinosyl side chains, no genes have been shown to be...

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