aspartic acid/arabidopsis

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His-404 and His-405 are essential for enzyme catalytic activities of a bacterial indole-3-acetyl-L-aspartic acid hydrolase.

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Bacterial indole-3-acetyl-l-aspartic acid (IAA-Asp) hydrolase has shown very high substrate specificity compared with similar IAA-amino acid hydrolase enzymes found in Arabidopsis thaliana. The IAA-Asp hydrolase also exhibits, relative to the Arabidopsis thaliana-derived enzymes, a very high Vmax

Overexpression of a bacterial indole-3-acetyl-l-aspartic acid hydrolase in Arabidopsis thaliana.

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Transgenic Arabidopsis lines (ecotype Col-0) carrying the Enterobacter agglomerans IaaspH gene under CaMV 35S promoter control were more sensitive to exogenous indole-3-acetyl aspartic acid (IAA-Asp) and metabolized [2'-14C]IAA-Asp more rapidly than control lines. Free IAA, total IAA and IAN levels

A glycine to aspartic acid change in the MoCo domain of nitrate reductase reduces both activity and phosphorylation levels in Arabidopsis.

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Nitrate reductase (NR), the first enzyme in the nitrate assimilation pathway, is regulated post-transcriptionally in response to light and CO2. In spinach, it has been shown that phosphorylation is one mechanism that mediates this regulation. In this paper, the phosphorylation of NR in Arabidopsis

The conjugated auxin indole-3-acetic acid-aspartic acid promotes plant disease development.

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Auxin is a pivotal plant hormone that regulates many aspects of plant growth and development. Auxin signaling is also known to promote plant disease caused by plant pathogens. However, the mechanism by which this hormone confers susceptibility to pathogens is not well understood. Here, we present

The S8 serine, C1A cysteine and A1 aspartic protease families in Arabidopsis.

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The Arabidopsis thaliana genome has over 550 protease sequences representing all five catalytic types: serine, cysteine, aspartic acid, metallo and threonine (MEROPS peptidase database, http://merops.sanger.ac.uk/), which probably reflect a wide variety of as yet unidentified functions performed by

Proteomic characterization of evolutionarily conserved and variable proteins of Arabidopsis cytosolic ribosomes.

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Analysis of 80S ribosomes of Arabidopsis (Arabidopsis thaliana) by use of high-speed centrifugation, sucrose gradient fractionation, one- and two-dimensional gel electrophoresis, liquid chromatography purification, and mass spectrometry (matrix-assisted laser desorption/ionization time-of-flight and

Molecular basis of alpha-methyltryptophan resistance in amt-1, a mutant of Arabidopsis thaliana with altered tryptophan metabolism.

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A mutant of Arabidopsis thaliana, amt-1, was previously selected for resistance to growth inhibition by the tryptophan analog alpha-methyltryptophan. This mutant had elevated tryptophan levels and exhibited higher anthranilate synthase (AS) activity that showed increased resistance to feedback

Phosphothreonine 218 is required for the function of SR45.1 in regulating flower petal development in Arabidopsis.

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RNA splicing is crucial to the production of mature mRNAs (mRNA). In Arabidopsis thaliana, the protein Arginine/Serine-rich 45 (SR45) acts as an RNA splicing activator and initiates the spliceosome assembly. SR45 is alternatively spliced into 2 isoforms. Isoform 1 (SR45.1) plays an important role in

A critical role of STAYGREEN/Mendel's I locus in controlling disease symptom development during Pseudomonas syringae pv tomato infection of Arabidopsis.

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Production of disease symptoms represents the final phase of infectious diseases and is a main cause of crop loss and/or marketability. However, little is known about the molecular basis of disease symptom development. In this study, a genetic screening was conducted to identify Arabidopsis

The phosphorylation status of the chloroplast protein kinase STN7 of Arabidopsis affects its turnover.

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The chloroplast serine-threonine protein kinase STN7 of Arabidopsis (Arabidopsis thaliana) is required for the phosphorylation of the light-harvesting system of photosystem II and for state transitions, a process that allows the photosynthetic machinery to balance the light excitation energy between

The DEG15 serine protease cleaves peroxisomal targeting signal 2-containing proteins in Arabidopsis.

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Two distinct peroxisomal targeting signals (PTSs), the C-terminal PTS1 and the N-terminal PTS2, are defined. Processing of the PTS2 on protein import is conserved in higher eukaryotes. Recently, candidates for the responsible processing protease were identified from plants (DEG15) and mammals

Arabidopsis thaliana G2-LIKE FLAVONOID REGULATOR and BRASSINOSTEROID ENHANCED EXPRESSION1 are low-temperature regulators of flavonoid accumulation.

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Flavonoid synthesis is predominantly regulated at the transcriptional level through the MYB-basic helix-loop-helix (bHLH)-WD40 (MBW) (MYB: transcription factor of the myeloblastosis protein family, WD40: tanscription factor with a short structural motif of 40 amino acids which terminates in an

Crystal structure of a thermostable lipase from Bacillus stearothermophilus P1.

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We describe the first lipase structure from a thermophilic organism. It shares less than 20% amino acid sequence identity with other lipases for which there are crystal structures, and shows significant insertions compared with the typical alpha/beta hydrolase canonical fold. The structure contains

Molecular cloning of Brassica rapa nitrilases and their expression during clubroot development.

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SUMMARY Three isoforms of nitrilase were cloned from turnip, Brassica rapa L., and their expression during clubroot development caused by Plasmodiophora brassicae was investigated. The isoforms were designated BrNIT-T1, BrNIT-T2 and BrNIT-T4 based on homology to known nitrilases. BrNIT-T1 and

Roles of conserved residues in the arginase family.

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Arginases and related enzymes metabolize arginine or similar nitrogen-containing compounds to urea or formamide. In the present report a sequence alignment of 31 members of this family was generated. The alignment, together with the crystal structure of rat liver arginase, allowed the assignment of

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