The genome of the human intestinal parasite Giardia lamblia contains only a single aminoacyl-tRNA synthetase gene for each amino acid. The Giardiaprolyl-tRNA synthetase gene product was originally misidentified as a dual-specificity Pro/Cys enzyme, in part owing to its unexpectedly high off-target
The total intracellular amino acid profiles of Giardia intestinalis trophozoites, Trichomonas vaginalis, and Crithidia luciliae were determined by sensitive amino acid analysis. The three protozoan parasites exhibited distinctively different amino acid profiles, but all three were dominated by high
1H-NMR spectroscopy was used to monitor the major metabolic end products released by Giardia lamblia when maintained anaerobically in culture in Diamond's TYI-S-33 medium. Spectra were acquired for the cell-free medium and the resonances of metabolites utilised and produced during cell growth
The adenine phosphoribosyltransferase (APRTase) from Giardia lamblia was co-crystallized with 9-deazaadenine and sulfate or with 9-deazaadenine and Mg-phosphoribosylpyrophosphate. The complexes were solved and refined to 1.85 and 1.95 A resolution. Giardia APRTase is a symmetric homodimer with the
Giardia intestinalis can develop resistance to albendazole, although the molecular mechanism is not understood. The aim of this study was to investigate the differences and permanent mutation in the beta-giardin gene of G. intestinalis strains: sensitive, resistant, or recovered-resistance to
Cysteinyl-tRNA (Cys-tRNA) is essential for protein synthesis. In most organisms the enzyme responsible for the formation of Cys-tRNA is cysteinyl-tRNA synthetase (CysRS). The only known exceptions are the euryarchaea Methanococcus jannaschii and Methanobacterium thermoautotrophicum, which do not
Proteins from the axonemes and disc cytoskeleton of Giardia lamblia have been examined by sodium dodecyl sulphate/polyacrylamide gel electrophoresis. In addition to tubulin and the 30 X 10(3) molecular weight disc protein, at least 18 minor components copurify with the two major proteins in
The microtubule associated system I fibers of the basal apparatus of the flagellate green alga Spermatozopsis similis are noncontractile and display a 28-nm periodicity. Paracrystals with similar periodicities are formed in vitro by SF-assemblin, which is the major protein component of system I
A large insertion domain called CP1 (connective peptide 1) present in class Ia aminoacyl-tRNA synthetases is responsible for post-transfer editing. LeuRS (leucyl-tRNA synthetase) from Aquifex aeolicus and Giardia lamblia possess unique 20 and 59 amino acid insertions respectively within the CP1 that
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