InterPro domain: IPR044290

This entry represents a group of plant arabinosyltransferases, including RRA1/2/3 from Arabidopsis. They have been implicated in extensin (a plant cell wall component) glycosylation [ 1 , 2 ]. The arabinosylation of extensin is important for root hair cell development [ 3 ].

1. Molecular characterization of two Arabidopsis thaliana glycosyltransferase mutants, rra1 and rra2, which have a reduced residual arabinose content in a polymer tightly associated with the cellulosic wall residue. Plant Mol Biol 64, 439-51
2. Plant science. Plants get Hyp to O-glycosylation. Science 332, 1393-4
3. O-glycosylated cell wall proteins are essential in root hair growth. Science 332, 1401-3