Skip to main content
Article thumbnail
Location of Repository

RESEARCH ARTICLE Arabidopsis thaliana T-DNA Mutants Implicate GAUT Genes in the Biosynthesis of Pectin and

By Xylan In Cell Walls, Seed Testa, Kerry H. Caffall A, Sivakumar Pattathil B, Sarah E. Phillips A, Michael G. Hahn B and Debra Mohnen A


ABSTRACT Galacturonosyltransferase 1 (GAUT1) is an a1,4-D-galacturonosyltransferase that transfers galacturonic acid from uridine 5#-diphosphogalacturonic acid onto the pectic polysaccharide homogalacturonan (Sterling et al., 2006). The 25-member Arabidopsis thaliana GAUT1-related gene family encodes 15 GAUT and 10 GAUT-like (GATL) proteins with, respectively, 56–84 and 42–53 % amino acid sequence similarity to GAUT1. Previous phylogenetic analyses of AtGAUTs indicated three clades: A through C. A comparative phylogenetic analysis of the Arabidopsis, poplar and rice GAUT families has sub-classified the GAUTs into seven clades: clade A-1 (GAUTs 1 to 3); A-2 (GAUT4); A-3 (GAUTs 5 and 6); A-4 (GAUT7); B-1 (GAUTs 8 and 9); B-2 (GAUTs 10 and 11); and clade C (GAUTs 12 to 15). The Arabidopsis GAUTs have a distribution comparable to the poplar orthologs, with the exception of GAUT2, which is absent in poplar. Rice, however, has no orthologs of GAUTs 2 and 12 and has multiple apparent orthologs of GAUTs 1, 4, and 7 compared with either Arabidopsis or poplar. The cell wall glycosyl residue compositions of 26 homozygous T-DNA insertion mutants for 13 of 15 Arabidopsis GAUT gene

Year: 2009
OAI identifier: oai:CiteSeerX.psu:
Provided by: CiteSeerX
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • (external link)
  • http://mplant.oxfordjournals.o... (external link)
  • Suggested articles

    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.