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11 résultats
Multiple proline substitutions cumulatively thermostabilize Bacillus cereus ATCC7064 oligo-1,6-glucosidase. Irrefragable proof supporting the proline rule.
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Nine residues of Bacillus cereus ATCC7064 oligo-1,6-glucosidase were replaced stepwise with proline residues. Of the nine residues, Lys121, Glu208 and Glu290 were at second sites of beta turns; Asn109, Glu175 and Thr261 were at N-caps of alpha helices; Glu216, Glu270 and Glu378 were in coils within
Isolation of A Bacillus cereus Strain HBL-AI and its Application for Production of Trans-4-hydroxy-L-proline
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A new trans-4-Hydroxy-L-proline (trans-Hyp) producing Bacillus cereus HBL-AI, was isolated from the air, which was screened just using L-proline as carbon and energy sources. This strain exhibited 73.4% bioconversion rate from initial L-proline (3 g lp>-1 p> ) to trans-Hyp. By sequencing the
Crystal structure of the flagellar chaperone FliS from Bacillus cereus and an invariant proline critical for FliS dimerization and flagellin recognition.
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FliS is a cytoplasmic flagellar chaperone for the flagellin, which polymerizes into filaments outside of the flagellated bacteria. Cytoplasmic interaction between FliS and flagellin is critical to retain the flagellin protein in a monomeric form, which is transported from the cytoplasm through the
The refined crystal structure of Bacillus cereus oligo-1,6-glucosidase at 2.0 A resolution: structural characterization of proline-substitution sites for protein thermostabilization.
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The crystal structure of oligo-1,6-glucosidase (dextrin 6-alpha-glucanohydrolase, EC 3.2.1.10) from Bacillus cereus ATCC7064 has been refined to 2.0 A resolution with an R-factor of 19.6% for 43,328 reflections. The final model contains 4646 protein atoms and 221 ordered water molecules with
A computational module assembled from different protease family motifs identifies PI PLC from Bacillus cereus as a putative prolyl peptidase with a serine protease scaffold.
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Proteolytic enzymes have evolved several mechanisms to cleave peptide bonds. These distinct types have been systematically categorized in the MEROPS database. While a BLAST search on these proteases identifies homologous proteins, sequence alignment methods often fail to identify relationships
Identification of the apparently essential lysine residues in phospholipase C (Bacillus cereus).
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Phospholipase C (Bacillus cereus) contains two apparently essential and very reactive lysine residues that may be labelled selectively by pyridoxal 5'-phosphate [Aurebekk & Little (1977) Biochem, J. 161, 159--165]. One of these lysine residues was found in the 25-amino acid N-terminal fragment
Structure determination through homology modelling and torsion-angle simulated annealing: application to a polysaccharide deacetylase from Bacillus cereus.
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The structure of BC0361, a polysaccharide deacetylase from Bacillus cereus, has been determined using an unconventional molecular-replacement procedure. Tens of putative models of the C-terminal domain of the protein were constructed using a multitude of homology-modelling algorithms, and these were
Structural basis for stereospecificity to d-amino acid of glycine oxidase from Bacillus cereus ATCC 14579
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Glycine oxidase (GO) is an enzyme that catalyzes the oxidation of the primary and secondary amines of various chemicals, including glycine, and the enzyme has been applied in a variety of fields, such as biosensor and genetically modified glyphosate resistance plants. Here, we report that the gene
Bacillus cereus-induced malabsorption in young mice.
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Following a single, oral dose of Bacillus cereus (2 X 10(8) bacteria) in vitro intestinal absorption of D-glucose, D-galactose, L-arginine, L-histidine, L-ornithine and L-proline in young mice (aged 2--3 1/2 months) decreased. Malabsorption of D-glucose was dose- and time-dependent. Impaired
NMR structure of the Bacillus cereus hemolysin II C-terminal domain reveals a novel fold.
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In addition to multiple virulence factors, Bacillus cereus a pathogen that causes food poisoning and life-threatening wound infections, secretes the pore-forming toxin hemolysin II (HlyII). The HlyII toxin has a unique 94 amino acid C-terminal domain (HlyIIC). HlyIIC exhibits splitting of NMR
Transcriptional responses of Bacillus cereus towards challenges with the polysaccharide chitosan.
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The antibacterial activity of the polysaccharide chitosan towards different bacterial species has been extensively documented. The response mechanisms of bacteria exposed to this biopolymer and the exact molecular mechanism of action, however, have hardly been investigated. This paper reports the
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