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Title: The Arabidopsis thaliana nucleotide sugar transporter GONST2 is a functional homolog of GONST1

Journal Article · · Plant Direct
DOI:https://doi.org/10.1002/pld3.309· OSTI ID:1772098
 [1];  [2];  [3];  [4];  [1]; ORCiD logo [1];  [1];  [1];  [1];  [5];  [1];  [2];  [1]; ORCiD logo [3]; ORCiD logo [5]; ORCiD logo [6]
  1. Joint BioEnergy Institute Emeryville CA USA, Environmental Genomics and Systems Biology Division Lawrence Berkeley National Laboratory Berkeley CA USA
  2. Graduate School of Science and Engineering Saitama University Japan
  3. Plant Sciences Department UC Davis Davis CA USA
  4. Graduate School of Biological Sciences NAIST Nara Japan
  5. Department of Biochemistry University of Cambridge Cambridge UK
  6. Joint BioEnergy Institute Emeryville CA USA, Environmental Genomics and Systems Biology Division Lawrence Berkeley National Laboratory Berkeley CA USA, School of Agriculture, Food and Wine University of Adelaide Adelaide SA Australia

Abstract Glycosylinositolphosphorylceramides (GIPCs) are the predominant lipid in the outer leaflet of the plasma membrane. Characterized GIPC glycosylation mutants have severe or lethal plant phenotypes. However, the function of the glycosylation is unclear. Previously, we characterized Arabidopsis thaliana GONST1 and showed that it was a nucleotide sugar transporter which provides GDP‐mannose for GIPC glycosylation. gonst1 has a severe growth phenotype, as well as a constitutive defense response. Here, we characterize a mutant in GONST1’s closest homolog, GONST2. The gonst2‐ 1 allele has a minor change to GIPC headgroup glycosylation. Like other reported GIPC glycosylation mutants, gonst1‐1gonst2‐1 has reduced cellulose, a cell wall polymer that is synthesized at the plasma membrane. The gonst2‐1 allele has increased resistance to a biotrophic pathogen Golovinomyces orontii but not the necrotrophic pathogen Botrytis cinerea . Expression of GONST2 under the GONST1 promoter can rescue the gonst1 phenotype, indicating that GONST2 has a similar function to GONST1 in providing GDP‐D‐Man for GIPC mannosylation.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); Biotechnology and Biological Sciences Research Council (BBSRC); Japan Society for the Promotion of Science (JSPS); Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT); National Science Foundation (NSF); USDA; Danish National Research Foundation (DNR)
Grant/Contract Number:
AC02-05CH11231; BB/D010446/1; 17K15411; 26292190; IOS-1339125; CA-D-PLS-7033-H; DNRF99
OSTI ID:
1772098
Alternate ID(s):
OSTI ID: 1786544; OSTI ID: 1813369
Journal Information:
Plant Direct, Journal Name: Plant Direct Vol. 5 Journal Issue: 3; ISSN 2475-4455
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United Kingdom
Language:
English

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