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cysteine/arabidopsis thaliana
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O-acetylserine (thiol) lyase: an enigmatic enzyme of plant cysteine biosynthesis revisited in Arabidopsis thaliana.
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The synthesis of cysteine is positioned at a decisive stage of assimilatory sulphate reduction, marking the fixation of inorganic sulphide into a carbon skeleton. O-acetylserine (thiol) lyase (OAS-TL) catalyses the reaction of inorganic sulphide with O-acetylserine (OAS). Despite its prominent
Structure and expression of two genes that encode distinct drought-inducible cysteine proteinases in Arabidopsis thaliana.
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Among nine cDNA clones (named RD) corresponding to genes that are responsive to dehydration in Arabidopsis thaliana, two clones, RD19 and RD21, were analyzed further. Northern blot analysis revealed that both the RD19 and RD21 mRNAs were not induced by abscisic acid. Neither RD19 nor RD21 mRNA
Atypical DNA methylation of genes encoding cysteine-rich peptides in Arabidopsis thaliana.
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BACKGROUND
In plants, transposons and non-protein-coding repeats are epigenetically silenced by CG and non-CG methylation. This pattern of methylation is mediated in part by small RNAs and two specialized RNA polymerases, termed Pol IV and Pol V, in a process called RNA-directed DNA methylation. By
Structural and functional studies of the mitochondrial cysteine desulfurase from Arabidopsis thaliana.
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AtNfs1 is the Arabidopsis thaliana mitochondrial homolog of the bacterial cysteine desulfurases NifS and IscS, having an essential role in cellular Fe-S cluster assembly. Homology modeling of AtNfs1m predicts a high global similarity with E. coli IscS showing a full conservation of residues involved
Molecular cloning and expression analyses of mitochondrial and plastidic isoforms of cysteine synthase (O-acetylserine(thiol)lyase) from Arabidopsis thaliana.
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Cysteine synthase, the key enzyme for fixation of inorganic sulfide, catalyses the formation of cysteine from O-acetylserine and inorganic sulfide. Here we report the cloning of cDNAs encoding cysteine synthase isoforms from Arabidopsis thaliana. The isolated cDNA clones encode for a mitochondrial
Functional properties of a cysteine proteinase from pineapple fruit with improved resistance to fungal pathogens in Arabidopsis thaliana.
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In plant cells, many cysteine proteinases (CPs) are synthesized as precursors in the endoplasmic reticulum, and then are subject to post-translational modifications to form the active mature proteinases. They participate in various cellular and physiological functions. Here, AcCP2, a CP from
Structural roles of cysteine 50 and cysteine 230 residues in Arabidopsis thaliana S-adenosylmethionine decarboxylase.
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The Arabidopsis thaliana S-Adenosylmethionine decarboxylase (AdoMetDC) cDNA (GenBank U63633) was cloned. Site-specific mutagenesis was performed to introduce mutations at the conserved cysteine Cys(50), Cys(83), and Cys(230), and lys(81) residues. In accordance with the human AdoMetDC, the C50A and
The role of roots in cysteine biosynthesis by Arabidopsis thaliana.
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O-Acetylserine(thiol)lyase (OASTL) enzyme catalyzes the cysteine biosynthesis in photosynthetic organisms. In mature Arabidopsis thaliana the highest activity level is observed in non-photosynthetic tissues like roots, that also show significant amount of protein detected by Western blot analysis.
L-Cysteine inhibits root elongation through auxin/PLETHORA and SCR/SHR pathway in Arabidopsis thaliana.
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L-Cysteine plays a prominent role in sulfur metabolism of plants. However, its role in root development is largely unknown. Here, we report that L-cysteine reduces primary root growth in a dosage-dependent manner. Elevating cellular L-cysteine level by exposing Arabidopsis thaliana seedlings to high
Cysteine synthesis in plants: protein-protein interactions of serine acetyltransferase from Arabidopsis thaliana.
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The biosynthesis of cysteine represents the final step of sulfate assimilation in bacteria and plants. It is catalyzed by the sequential action of serine acetyltransferase (SAT) and O-acetylserine (thiol) lyase (OAS-TL) which form a cysteine synthase (CS) complex in vitro. SAT and OAS-TL from
Allosterically gated enzyme dynamics in the cysteine synthase complex regulate cysteine biosynthesis in Arabidopsis thaliana.
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Plants and bacteria assimilate sulfur into cysteine. Cysteine biosynthesis involves a bienzyme complex, the cysteine synthase complex (CSC), which consists of serine-acetyl-transferase (SAT) and O-acetyl-serine-(thiol)-lyase (OAS-TL) enzymes. The activity of OAS-TL is reduced by formation of the
Iris lactea var. chinensis (Fisch.) cysteine-rich gene llCDT1 enhances cadmium tolerance in yeast cells and Arabidopsis thaliana.
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IlCDT1, a cysteine-rich protein, was isolated from Iris lactea var. chinensis (Fisch.) (I. lactea var. chinensis). Its transcription was up-regulated by the exogenous application of Cd. The truncated IlCDT1 (25-54) containing 14 Cys residues confers Cd tolerance to yeast as the intact IlCDT1,
Cysteine biosynthesis in plants: isolation and functional identification of a cDNA encoding a serine acetyltransferase from Arabidopsis thaliana.
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A cDNA encoding for serine acetyltransferase which catalyzes the committing step of cysteine biosynthesis has been cloned from Arabidopsis thaliana. The plant protein has a predicted molecular weight of 32.8 kDa and shows up to 43% of amino acid homology to bacterial serine acetyltransferases. It
X-ray structures of Nfs2, the plastidial cysteine desulfurase from Arabidopsis thaliana.
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The chloroplastic Arabidopsis thaliana Nfs2 (AtNfs2) is a group II pyridoxal 5'-phosphate-dependent cysteine desulfurase that is involved in the initial steps of iron-sulfur cluster biogenesis. The group II cysteine desulfurases require the presence of sulfurtransferases such as SufE proteins for
Overproduction of L-cysteine and L-cystine by expression of genes for feedback inhibition-insensitive serine acetyltransferase from Arabidopsis thaliana in Escherichia coli.
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Two cDNAs encoding feedback inhibition-insensitive serine acetyltransferases of Arabidopsis thaliana were expressed in the chromosomal serine acetyltransferase-deficient and L-cysteine non-utilizing Escherichia coli strain JM39-8. The transformants produced 1600 to 1700 mg l(-1) of L-cysteine and
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