InterPro domain: IPR044845

This entry represents a group of plant glycosyltransferases, including HPAT1-3 and SERGT1 from Arabidopsis. HPAT1 is a hydroxyproline O-arabinosyltransferase involved in the O-arabinosylation of several proteins including extensins and small signaling peptides [ 1 , 2 ]. It catalyses the transfer of the initial L-arabinose to the hydroxyl group of Hyp residues [ 3 ]. SERGT1, also known as AtSGT1, is a peptidyl serine O-alpha-galactosyltransferase [ 3 ].

Proteins in this entry also include PLENTY from Lotus japonicus [ 4 ] and RDN1/2 (ROOT DETERMINED NODULATION1/2) from Medicago truncatula [ 5 ].

1. Identification of three hydroxyproline O-arabinosyltransferases in Arabidopsis thaliana. Nat Chem Biol 9, 726-30
2. Hydroxyproline O-arabinosyltransferase mutants oppositely alter tip growth in Arabidopsis thaliana and Physcomitrella patens. Plant J 85, 193-208
3. Identification of Novel Peptidyl Serine α-Galactosyltransferase Gene Family in Plants. J Biol Chem 289, 20405-20420
4. PLENTY, a hydroxyproline O-arabinosyltransferase, negatively regulates root nodule symbiosis in Lotus japonicus. J Exp Bot 70, 507-517
5. ROOT DETERMINED NODULATION1 Is Required for M. truncatula CLE12, But Not CLE13, Peptide Signaling through the SUNN Receptor Kinase. Plant Physiol 174, 2445-2456