NDLI: Enzyme mediated silicon–oxygen bond formation; the use of <i>Rhizopus oryzae</i> lipase, lysozyme and phytase under mild conditions

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Dalton Transactions Vol -46

Dalton Transactions Vol -39

Dalton Transactions Vol - 39 Issue - 48

Dalton Transactions Vol - 39 Issue - 39

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Contents

Inside front cover

New horizon of organosilicon chemistry

Silylium ions in catalysis

Thorpe–Ingold effect in organosilicon chemistry

Cyclolinear polycarbosilanes – a recent addition to the class of organosilicon polymers

π-Conjugated disilenes stabilized by fused-ring bulky “Rind” groups

Organosilicon compounds meet subatomic physics: Muon spin resonance

Kinetic studies of reactions of organosilylenes: what have they taught us?

A two-and-a-half-layer sandwich: potassium salt of anionic (η⁴-tetrasilacyclobutadiene)(η⁵-cyclopentadienyl)ruthenium

Reactivities of chlorotrisylsilylenoid with ketones

Chiral cyclotrisiloxanes

Reactivity of an aryl-substituted silicon–silicon triple bond: 1,2-disilabenzenes from the reactions of a 1,2-diaryldisilyne with alkynes

Facile central-element exchange in neutral hexacoordinate germanium and silicon complexes; synthesis and characterization of germanium complexes

Formation of silicones mediated by the sponge enzyme silicatein-α

Synthesis and reactivity of rhodium and iridium alkene, alkyl and silyl complexes supported by a phenyl-substituted PNP pincer ligand

Phosphido-bridged Ta/Rh bimetallic complex: synthesis, structure, and catalytic hydrosilylation of acetophenone

The quest for silylhydroboranes: (Me₃Si)₃SiBH₂

Strained organosilacyclic compounds: synthesis of anti-Bredt olefins and trans-dioxasilacyclooctenes

Coordination of a SiO subunit to metals: complexes of donor-stabilized silanone featuring a terminal SiO→M coordination (M = Zn, Al)

Synthesis, characterisation and complexation of phosphino disilenes

Silaimidazolium and silaimidazolidinium ions

Theoretical investigations of the reactivities of lattice-framework carbene analogues of the group 14 elements

Effects of the silicon core structures on the hole mobility of star-shaped oligothiophenes

Luminescent platinum complexes containing phosphorus-linked silole ligands

Application of the sila-Friedel–Crafts reaction to the synthesis of π-extended silole derivatives and their properties

Theoretical study of the mechanisms of [3+2] cycloaddition reactions of trimetallaallenes [MMM] (M = C, Si, Ge, Sn, and Pb)

The mechanism and energetics of insertion reactions of silylenes

The gas-phase structure and some reactions of the bulky primary silane (Me₃Si)₃CSiH₃ and the solid-state structure of the bulky dialkyl disilane [(Me₃Si)₃CSiH₂]₂

Enzyme mediated silicon–oxygen bond formation; the use of Rhizopus oryzae lipase, lysozyme and phytase under mild conditions

Rapid assembly of explicit, functional silicones

Unsuccessful attempts to add alcohols to transient 2-amino-2-siloxy-silenes - leading to a new benign route for base-free alcohol protection

Synthesis of η²-cyclooctene iridium and rhodium complexes supported by a novel P,N-chelate ligand and their reactivity toward hydrosilanes: facile Cl migration from metal to silicon via silylene complex intermediates and formation of a base-stabilised silylene complex

Novel neutral hexacoordinate silicon(iv) complexes with two bidentate monoanionic benzamidinato ligands

Synthesis and structures of (dialkylsilylene)bis(phosphine)-nickel, palladium, and platinum complexes and (η⁶-arene)(dialkylsilylene)nickel complexes

Synthesis and properties of 5,10,15,20-tetrakis[4-(alkoxysilyl)phenyl]porphyrins: an application of selective deprotection of benzaldehyde diethyl acetals in the presence of alkoxysilyl groups

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Dalton Transactions Vol -0

Enzyme mediated silicon–oxygen bond formation; the use of Rhizopus oryzae lipase, lysozyme and phytase under mild conditions

Content Provider	Royal Society of Chemistry (RSC)
Author	Brandstadt, Kurt F. Lawson, Rachel Bassindale, Alan R. Abbate, Vincenzo Taylor, Peter G.
Copyright Year	2010
Abstract	The potential for expanding the variety of enzymic methods for siloxane bond formation is explored. Three enzymes, Rhizopus oryzae lipase (ROL), lysozyme and phytase are reported to catalyse the condensation of the model compound, trimethylsilanol, formed in situ from trimethylethoxysilane, to produce hexamethyldisiloxane in aqueous media at 25 °C and pH 7. Thermal denaturation and reactant inhibition experiments were conducted to better understand the catalytic role of these enzyme candidates. It was found that enzyme activities were significantly reduced following thermal treatment, suggesting a potential key-role of the enzyme active sites in the catalysis. Similarly, residue-specific modification of the key-amino acids believed to participate in the ROL catalysis also had a significant effect on the silicon bio-catalysis, indicating that the catalytic triad of the lipase may be involved during the enzyme-mediated formation of the silicon–oxygen bond. E. coli phytase was found to be particularly effective at catalysing the condensation of trimethylsilanol in a predominantly organic medium consisting of 95% acetonitrile and 5% water. Whereas the use of enzymes in silicon chemistry is still very much a developing and frontier activity, the results presented herein give some grounds for optimism that the variety of enzyme mediated reactions will continue to increase and may one day become a routine element in the portfolio of the synthetic silicon chemist.
Starting Page	9361
Ending Page	9368
Page Count	8
File Format	HTM / HTML PDF
ISSN	14779226
Volume Number	39
Issue Number	39
Journal	Dalton Transactions
DOI	10.1039/c0dt00151a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Siloxane Covalent bond Rhizopus oryzae Lipase Lysozyme Phytase Trimethylsilanol Hexamethyldisiloxane Acid Denaturation (biochemistry) Enzyme Catalytic triad Escherichia coli Acetonitrile Organic chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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Gene Cloning, Heterologous Expression and Biochemical Characterization of A Novel Extracellular Lipase from Rhizopus Oryzae KU45.

Heterologous production of functional forms of Rhizopus oryzae lipase in Escherichia coli.

Recyclable antibacterial material: silicon grafted with 3,6-O-sulfated chitosan and specifically bound by lysozyme

Enzyme-mediated Synthesis of Silsesquioxanes

Optimization of Phytase Production from Escherichia coli by Altering Solid-State Fermentation Conditions

N-terminal peptide of Rhizopus oryzae lipase is important for its catalytic properties.

Biodiesel Synthesis in a Solvent-Free System by Recombinant Rhizopus oryzae Lipase. Study of the Catalytic Reaction Progress

Modification of Escherichia coli DNA ligase by cleavage with trypsin (1976)

Rhizopus oryzae Lipase, a Promising Industrial Enzyme: Biochemical Characteristics, Production and Biocatalytic Applications

Enzyme mediated silicon–oxygen bond formation; the use of Rhizopus oryzae lipase, lysozyme and phytase under mild conditions

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Gene Cloning, Heterologous Expression and Biochemical Characterization of A Novel Extracellular Lipase from Rhizopus Oryzae KU45.

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