phosphodiesterase/arabidopsis thaliana

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Crystal structures of the semireduced and inhibitor-bound forms of cyclic nucleotide phosphodiesterase from Arabidopsis thaliana.

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The crystal structure of the semireduced form of cyclic nucleotide phosphodiesterase (CPDase) from Arabidopsis thaliana has been solved by molecular replacement and refined at the resolution of 1.8 A. We have previously reported the crystal structure of the native form of this enzyme, whose main

Structure-function studies of a plant tyrosyl-DNA phosphodiesterase provide novel insights into DNA repair mechanisms of Arabidopsis thaliana.

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TDP1 (tyrosyl-DNA phosphodiesterase 1), a member of the PLD (phospholipase D) superfamily, catalyses the hydrolysis of a phosphodiester bond between a tyrosine residue and the 3'-phosphate of DNA. We have previously identified and characterized the AtTDP gene in Arabidopsis thaliana, an orthologue

Structural evidence that brain cyclic nucleotide phosphodiesterase is a member of the 2H phosphodiesterase superfamily.

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2',3'-Cyclic-nucleotide 3'-phosphodiesterase (CNP) is an enzyme abundantly present in the central nervous system of mammals and some vertebrates. In vitro, CNP specifically catalyzes the hydrolysis of 2',3'-cyclic nucleotides to produce 2'-nucleotides, but the physiologically relevant in vivo

Biophysical characterization of cyclic nucleotide phosphodiesterases.

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We have compared selected biophysical properties of three phosphodiesterases, from Arabidopsis thaliana, Saccharomyces cerevisiae, and Escherichia coli. All of them belong to a recently identified family of cyclic nucleotide phosphodiesterases. Experiments elucidating folding stability, protein

Structure and mechanism of activity of the cyclic phosphodiesterase of Appr>p, a product of the tRNA splicing reaction.

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The crystal structure of the cyclic phosphodiesterase (CPDase) from Arabidopsis thaliana, an enzyme involved in the tRNA splicing pathway, was determined at 2.5 A resolution. CPDase hydrolyzes ADP-ribose 1",2"-cyclic phosphate (Appr>p), a product of the tRNA splicing reaction, to the monoester

Cloning of cDNAs from Arabidopsis thaliana that encode putative protein phosphatase 2C and a human Dr1-like protein by transformation of a fission yeast mutant.

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We characterized three Arabidopsis thaliana cDNA clones that could rescue the sterile phenotype of the Schizosaccharomyces pombe pde1 mutant, which is defective in cAMP phosphodiesterase. The first clone had a coding capacity of 399 amino acids that is 35% identical with rat protein phosphatase 2C

cGMP is required for seed germination in Arabidopsis thaliana.

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Cyclic guanosine 3',5'-monophosphate (cGMP) is an important second messenger in animals, and is emerging as a player in regulatory functions in plants. In this study, we investigated the role of cGMP in seed germination in Arabidopsis thaliana (Col-0). We demonstrated that both, a membrane-permeant

The glycerophosphoryl diester phosphodiesterase-like proteins SHV3 and its homologs play important roles in cell wall organization.

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Despite the importance of extracellular events in cell wall organization and biogenesis, the mechanisms and related factors are largely unknown. We isolated an allele of the shaven3 (shv3) mutant of Arabidopsis thaliana, which exhibits ruptured root hair cells during tip growth. SHV3 encodes a novel

The major Arabidopsis thaliana apurinic/apyrimidinic endonuclease, ARP is involved in the plant nucleotide incision repair pathway.

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Apurinic/apyrimidinic (AP) endonucleases are important DNA repair enzymes involved in two overlapping pathways: DNA glycosylase-initiated base excision (BER) and AP endonuclease-initiated nucleotide incision repair (NIR). In the BER pathway, AP endonucleases cleave DNA at AP sites and 3'-blocking

The Protease WSS1A, the Endonuclease MUS81, and the Phosphodiesterase TDP1 Are Involved in Independent Pathways of DNA-protein Crosslink Repair in Plants.

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DNA-protein crosslinks (DPCs) represent a severe threat to the genome integrity; however, the main mechanisms of DPC repair were only recently elucidated in humans and yeast. Here we define the pathways for DPC repair in plants. Using CRISPR/Cas9, we could show that only one of two homologs of the

The Tyrosyl-DNA Phosphodiesterase 1β (Tdp1β) Gene Discloses an Early Response to Abiotic Stresses.

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Tyrosyl-DNA phosphodiesterase 1 (Tdp1) is involved in DNA repair pathways as it mends the topoisomerase I-DNA covalent complexes. In plants, a small Tdp1 gene family, composed by Tdp1α and Tdp1β genes, was identified, but the roles of these genes in abiotic stress responses are not fully understood.

Identification of tyrosyl-DNA phosphodiesterase as a novel DNA damage repair enzyme in Arabidopsis.

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Tyrosyl-DNA phosphodiesterase 1 (Tdp1) is a key enzyme that hydrolyzes the phosphodiester bond between tyrosine of topoisomerase and 3'-phosphate of DNA and repairs topoisomerase-mediated DNA damage during chromosome metabolism. However, functional Tdp1 has only been described in yeast and human to

Identification and characterization of plant glycerophosphodiester phosphodiesterase.

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GPX-PDE (glycerophosphodiester phosphodiesterase; EC 3.1.4.46) is a relatively poorly characterized enzyme that catalyses the hydrolysis of various glycerophosphodiesters (glycerophosphocholine, glycerophosphoethanolamine, glycerophosphoglycerol, glycerophosphoserine and bis-glycerophosphoglycerol),

AtCML8, a calmodulin-like protein, differentially activating CaM-dependent enzymes in Arabidopsis thaliana.

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Plants express many calmodulins (CaMs) and calmodulin-like (CML) proteins that sense and transduce different Ca(2+) signals. Previously, we reported divergent soybean (Glycine max) CaM isoforms (GmCaM4/5) with differential abilities to activate CaM-dependent enzymes. To elucidate biological

Fhit proteins can also recognize substrates other than dinucleoside polyphosphates.

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We show here that Fhit proteins, in addition to their function as dinucleoside triphosphate hydrolases, act similarly to adenylylsulfatases and nucleoside phosphoramidases, liberating nucleoside 5'-monophosphates from such natural metabolites as adenosine 5'-phosphosulfate and adenosine

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