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CYP98A3 from Arabidopsis thaliana Is a 3′-Hydroxylase of Phenolic Esters, a Missing Link in the Phenylpropanoid Pathway*
TLDR
It is shown that the gene encoding CYP98A3, which was the best possible P450 candidate for a 3-hydroxylase in the Arabidopsis genome, is highly expressed in inflorescence stems and wounded tissues and catalyzes the synthesis of chlorogenic acid and very likely also the 3-Hydroxylation of lignin monomers.
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Phenolamides: bridging polyamines to the phenolic metabolism.
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Cytochromes P450 CYP94C1 and CYP94B3 Catalyze Two Successive Oxidation Steps of Plant Hormone Jasmonoyl-isoleucine for Catabolic Turnover
TLDR
Interestingly, exaggerated JA-Ile levels were associated with JAZ repressor hyperinduction but did not enhance durably defense gene induction, revealing a novel negative feedback signaling loop.
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Evolution of a Novel Phenolic Pathway for Pollen Development
TLDR
A retroposition, neofunctionalization, and duplication sequence that, via selective and local amino acid replacement, led to the evolution of a novel phenolic pathway in Brassicaceae is described and shows how positive Darwinian selection can favor structured clusters of nonsynonymous substitutions that are needed for the transition of enzymes to new functions.
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A phenol-enriched cuticle is ancestral to lignin evolution in land plants
TLDR
A critical role for the ancestral phenolic metabolism in moss erect growth and cuticle permeability is demonstrated, consistent with importance in plant adaptation to terrestrial conditions.
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A coumaroyl-ester-3-hydroxylase Insertion Mutant Reveals the Existence of Nonredundant meta-Hydroxylation Pathways and Essential Roles for Phenolic Precursors in Cell Expansion and Plant…
TLDR
It is shown that CYP98A3 constitutes a critical bottleneck in the phenylpropanoid pathway and in the synthesis of compounds controlling plant development and inhibited cell growth seems correlated with alterations in the abundance of cell wall polysaccharides, in particular decrease in crystalline cellulose.
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Maturation of Cytosolic Iron-Sulfur Proteins Requires Glutathione*
TLDR
Together, the data demonstrate that glutathione, in addition to its protective role against oxidative damage, performs a novel and specific function in the maturation of cytosolic Fe/S proteins.
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Protein–Protein and Protein–Membrane Associations in the Lignin Pathway[W][OA]
Analysis of the supramolecular organization of enzymes in the lignin pathway shows that cytochrome P450s oligomerize and move along with the very mobile plant endoplasmic reticulum. Their expression…
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UDP-glucose sterol beta-D-glucosyltransferase, a plasma membrane-bound enzyme of plants: enzymatic properties and lipid dependence.
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Differential Production of meta Hydroxylated Phenylpropanoids in Sweet Basil Peltate Glandular Trichomes and Leaves Is Controlled by the Activities of Specific Acyltransferases and Hydroxylases1
TLDR
Two basil cDNAs encoding isozymes of cytochrome P450 CYP98A13, which meta hydroxylates p-coumaroyl shikimate, were isolated and found to be highly similar (90% identity) to the Arabidopsis homolog, CYP 98A3.
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