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Página 1 a partir de 37 resultados
Soyuretox, an Intrinsically Disordered Polypeptide Derived from Soybean (Glycine Max) Ubiquitous Urease with Potential Use as a Biopesticide.
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Ureases from different biological sources display non-ureolytic properties that contribute to plant defense, in addition to their classical enzymatic urea hydrolysis. Antifungal and entomotoxic effects were demonstrated for Jaburetox, an intrinsically disordered polypeptide derived from jack bean
Molecular docking of Glycine max and Medicago truncatula ureases with urea; bioinformatics approaches.
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Urease (EC 3.5.1.5) is a nickel-dependent metalloenzyme catalyzing the hydrolysis of urea into ammonia and carbon dioxide. It is present in many bacteria, fungi, yeasts and plants. Most species, with few exceptions, use nickel metalloenzyme urease to hydrolyze urea, which is one of the commonly used
Biochemical and structural studies on native and recombinant Glycine max UreG: a detailed characterization of a plant urease accessory protein.
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Urea is the nitrogen fertilizer most utilized in crop production worldwide. Understanding all factors involved in urea metabolism in plants is an essential step towards assessing and possibly improving the use of urea by plants. Urease, the enzyme responsible for urea hydrolysis, and its accessory
Soybean (Glycine max) urease: significance of sulfhydryl groups in urea catalysis.
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The soybean urease (urea amidohydrolase; EC 3.5.1.5) was investigated to elucidate the presence of sulfhydryl (-SH) groups and their significance in urea catalysis with the help of various -SH group specific reagents. The native urease incubated with 5,5'-dithiobis (2-nitrobenzoic acid) (DTNB)
Inhibition studies of soybean (Glycine max) urease with heavy metals, sodium salts of mineral acids, boric acid, and boronic acids.
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Various inhibitors were tested for their inhibitory effects on soybean urease. The K(i) values for boric acid, 4-bromophenylboronic acid, butylboronic acid, and phenylboronic acid were 0.20 +/- 0.05 mM, 0.22 +/- 0.04 mM, 1.50 +/- 0.10 mM, and 2.00 +/- 0.11 mM, respectively. The inhibition was
Studies of histidine residues in soybean (Glycine max) urease.
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Soybean urease has been investigated extensively to reveal the presence of histidine residue (s) in the active site and their potential role in the catalysis. The spectrophotometric studies using diethylpyrocarbonate (DEP) showed the modification of 11.76 ± 0.1 histidine residues per mole of native
A soybean seed urease-null produces urease in cell culture.
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Itachi, a soybean (Glycine max [L.] Merr.) variety with 0.2% normal seed urease activity, was recovered from a screen of 6,000 entries in the United States Department of Agriculture soybean germplasm collection. No urease antigen in Itachi seed extracts was detected by double diffusion or by rocket
Pleiotropic soybean mutants defective in both urease isozymes.
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Two new soybean [Glycine max (L.) Merr. cv. Williams] loci, designated Eu2 and Eu3, were identified in which ethyl methanesulfonate (EMS)-induced mutation eliminated urease activity. These loci showed no linkage to each other or to the "Sun-Eul" locus described in the accompanying paper
Activation of the urease of Schizosaccharomyces pombe by the UreF accessory protein from soybean.
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Plant orthologs of the bacterial urease accessory genes ureD and ureF, which are required for the insertion of the nickel ion at the active site, have been isolated from soybean ( Glycine max L. Merr.), tomato ( Lycopersicon esculentum) and Arabidopsis thaliana. The functionality of soybean UreD and
Recovery of a soybean urease genomic clone by sequential library screening with two synthetic oligodeoxynucleotides.
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We report the first isolation of a low-copy-number gene from a complex higher plant (soybean) genome by direct screening with synthetic oligodeoxynucleotide (oligo) probes. A synthetic, mixed, 21-nucleotide (nt) oligo (21-1) based on a seven amino acid (aa) sequence from soybean seed urease, was
Genetic tests of the roles of the embryonic ureases of soybean.
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We assayed the in vivo activity of the ureases of soybean (Glycine max) embryos by genetically eliminating the abundant embryo-specific urease, the ubiquitous urease, or a background urease. Mutant embryos accumulated urea (250-fold over progenitor) only when lacking all three ureases and only when
Urease from cotton (Gossypium hirsutum) seeds: isolation, physicochemical characterization, and antifungal properties of the protein.
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Ureases (EC 3.5.1.5) are metalloenzymes that hydrolyze urea to produce ammonia and carbon dioxide These enzymes, which are found in fungi, bacteria, and plants, show very similar structures. Despite an abundance of urease in vegetal tissues, the physiological role of this enzyme in plants is still
Soybean leaf urease: a seed enzyme?
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The soybean (Glycine max L. [Merrill]) var Itachi has 0.2 to 0.3% the urease activity found in developing embryos of a normal line, Prize. The hydroxyurea sensitivity and pH preference of this basal seed urease indicate that it represents a unique enzyme rather than an unusually low level of the
Mutational analysis of the embryo-specific urease locus of soybean.
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By a non-destructive urease screen of M2 soybean (Glycine max [L.] Merr. cv. Williams) seeds, four true-breeding mutants (n4, n6, n7 and n8) were recovered which lack most (n6, n8) or all (n4, n7) embryo-specific urease activity. This trait was due to a single, recessive lesion at the Sun (seed
Urease-null and hydrogenase-null phenotypes of a phylloplane bacterium reveal altered nickel metabolism in two soybean mutants.
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Mutation at either of two genetic loci (Eu2 or Eu3) in soybean (Glycine max [L.] Merr.) results in a pleiotropic elimination of the activity of both major urease isozymes. Surprisingly, the phenotype of a phylloplane bacterium, Methylobacterium mesophilicum, living on the leaves of eu2/eu2 or
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