beta glycosidase/cariës

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Insights into the pH-dependent catalytic mechanism of Sulfolobus solfataricus β-glycosidase: A molecular dynamics study.

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Sulfolobus solfataricus β-glycosidase (SS-βGly) belongs to Glycosyl Hydrolase family1 (GH1) with broad substrate specificity. SS-βGly catalyzes both hydrolysis and transglycosylation reactions. SS-βGly is commonly used to synthesize variety of galacto-oligosaccharides. A comparison of SS-βGly with

Crystal structure of the beta-glycosidase from the hyperthermophilic archeon Sulfolobus solfataricus: resilience as a key factor in thermostability.

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Enzymes from hyperthermophilic organisms must operate at temperatures which rapidly denature proteins from mesophiles. The structural basis of this thermostability is still poorly understood. Towards a further understanding of hyperthermostability, we have determined the crystal structure of the

Design of mutants for enhanced thermostability of β-glycosidase BglY from Thermus thermophilus.

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Three design strategies, based on rational and semi-rational approaches, were employed to investigate the functional impact of thermostability-related amino acid substitutions in the β-glycosidase BglY from Thermus thermophilus. Five beneficial mutations were identified, of which 1 mutation was

Crystal structures of Paenibacillus polymyxa beta-glucosidase B complexes reveal the molecular basis of substrate specificity and give new insights into the catalytic machinery of family I glycosidases.

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Bacteria species involved in degradation of cellulosic substrates produce a variety of enzymes for processing related compounds along the hydrolytic pathway. Paenibacillus polymyxa encodes two homologous beta-glucosidases, BglA and BglB, presenting different quaternary structures and substrate

Inhibition of rabbit muscle glycogen phosphorylase by D-gluconohydroximo-1,5-lactone-N-phenylurethane.

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The effect of the beta-glycosidase inhibitor D-gluconohydroximo-1,5-lactone-N-phenylurethane (PUG) on the kinetic and ultracentrifugation properties of glycogen phosphorylase has been studied. Recent crystallographic work at 2.4 A resolution [D. Barford et al. (1988) Biochemistry 27, 6733-6741] has

Atomic resolution (1.1 A) structure of the ribosome-inactivating protein PD-L4 from Phytolacca dioica L. leaves.

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The ribosome inactivating protein PD-L4 from Phytolacca dioica is a N-beta-glycosidase, probably involved in plant defence. The crystal structures of wild type PD-L4 and of the S211A PD-L4 mutant with significantly decreased catalytic activity were determined at atomic resolution. To determine the

Two-Dimensional Crystallization of P22 Virus-Like Particles.

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Virus-like particles (VLPs) are well established platforms for constructing functional biomimetic materials. The VLP from the bacteriophage P22 can be used as a nanocontainer to sequester active enzymes, at high concentration, within its cavity through a process of directed self-assembly.

Crystal structures of β-primeverosidase in complex with disaccharide amidine inhibitors.

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β-Primeverosidase (PD) is a disaccharide-specific β-glycosidase in tea leaves. This enzyme is involved in aroma formation during the manufacturing process of oolong tea and black tea. PD hydrolyzes β-primeveroside (6-O-β-d-xylopyranosyl-β-d-glucopyranoside) at the β-glycosidic bond of primeverose to

A computational approach to structural properties of glycoside hydrolase family 4 from bacteria.

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Structural bioinformatics approaches applied to the alpha- and beta-glycosidases from the GH4 enzyme family reveal that, despite low sequence identity, these enzymes possess quite similar global structural characteristics reflecting a common reaction mechanism. Locally, there are a few distinctive

Full and Partial Agonism of a Designed Enzyme Switch.

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Chemical biology has long sought to build protein switches for use in molecular diagnostics, imaging, and synthetic biology. The overarching challenge for any type of engineered protein switch is the ability to respond in a selective and predictable manner that caters to the specific environments

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