Arabidopsis genes IRREGULAR XYLEM (IRX15) and IRX15L encode DUF579-containing proteins that are essential for normal xylan deposition in the secondary cell wall.

@article{Brown2011ArabidopsisGI,
  title={Arabidopsis genes IRREGULAR XYLEM (IRX15) and IRX15L encode DUF579-containing proteins that are essential for normal xylan deposition in the secondary cell wall.},
  author={David M Brown and Raymond Wightman and Zhinong Zhang and Leonardo Dario Gomez and Ivan Atanassov and John-Paul Bukowski and Theodora Tryfona and Simon J. McQueen-Mason and Paul Dupree and Simon R. Turner},
  journal={The Plant journal : for cell and molecular biology},
  year={2011},
  volume={66 3},
  pages={
          401-13
        }
}
There are 10 genes in the Arabidopsis genome that contain a domain described in the Pfam database as domain of unknown function 579 (DUF579). Although DUF579 is widely distributed in eukaryotic species, there is no direct experimental evidence to assign a function to it. Five of the 10 Arabidopsis DUF579 family members are co-expressed with marker genes for secondary cell wall formation. Plants in which two closely related members of the DUF579 family have been disrupted by T-DNA insertions… Expand
The DUF579 domain containing proteins IRX15 and IRX15-L affect xylan synthesis in Arabidopsis.
TLDR
It is concluded that IRX 15 and IRX15-L function in a redundant manner and are involved in xylan biosynthesis. Expand
Arabidopsis VASCULAR-RELATED UNKNOWN PROTEIN1 Regulates Xylem Development and Growth by a Conserved Mechanism That Modulates Hormone Signaling1[W][OPEN]
TLDR
It is shown that the VUP1 expression pattern, determined by promoter-β-glucuronidase reporter gene expression, is associated with vascular tissues, while vup1 loss-of-function mutants exhibit collapsed morphology of xylem vessel cells. Expand
KNAT7 positively regulates xylan biosynthesis by directly activating IRX9 expression in Arabidopsis.
TLDR
Using transactivation analyses, it is demonstrated that KNAT7 activates the promoters of the xylan biosynthetic genes, IRREGULAR XYLEM 9 (IRX9), IRX9, IRX10, IRR14L, and FRA8, and Electrophoretic mobility shift assays indicated that KNat7 binds to the IRX7 promoter. Expand
Arabidopsis thaliana IRX10 and two related proteins from psyllium and Physcomitrella patens are xylan xylosyltransferases.
TLDR
It is found that an IRX10 homolog from the moss Physcomitrella patens displays robust activity, and it is shown that the xylosidic linkage formed is a β-1,4 linkage, establishing this protein as a xylan β- 1,4-xylosyltransferase. Expand
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TLDR
It is demonstrated that the over-expression of the closely related rice genes, in full or partly complement the two well-characterizedArabidopsis irregular xylem (irx) mutants: irx9 and irx14, have similar functions to the Arabidopsis IRX9 and IRX14 genes, respectively. Expand
Arabidopsis family GT43 members are xylan xylosyltransferases required for the elongation of the xylan backbone.
TLDR
Investigation of the enzymatic activities of two Arabidopsis thaliana GT43 members, IRX9 and IRX14, provides the first biochemical evidence that IRX 9 and IRx14 are xylosyltransferases that operate cooperatively in the elongation of the xylan backbone. Expand
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TLDR
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TLDR
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TLDR
Cell walls analysis showed that the composition of the pectin fraction of the cambium cell wall was altered while other polysaccharides were not affected in PtrDUF579-1 suppressed plants, suggesting cambial expressed PtrCambium expressed P trDUF580-1 may affect cell wall biosynthesis and be involved in cambio cell proliferation in Populus. Expand
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TLDR
36 R2R3-MYBs were either preferentially or highly expressed in 20 day post anthesis (dpa) fibers and are putative SCW regulators in cotton fibers that represent strong candidates for further functional studies during fiber development and SCW thickening. Expand
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