Journal ArticleDOI
34S isotope effect on sulfate ester hydrolysis: mechanistic implications.
Benjamin T. Burlingham,Lisa M. Pratt,Ernest R. Davidson,Vernon J. Shiner,Jon Fong,Theodore S. Widlanski +5 more
TLDR
The isotope effect method reported should also prove useful for studying the mechanism of other sulfuryl group transfers, including sulfatase and sulfotransferase reactions, as well as sulfate hydrolyses under other conditions.Abstract:
In this communication, we report the first determination of 34S kinetic isotope effects (KIEs) for the hydrolysis of sulfate monoesters The method involves the conversion of the inorganic sulfate, acquired at partial extent of reaction, to SO2, followed by isotope ratio determination by mass spectrometry The KIEs determined for p-nitrophenyl sulfate and p-acetylphenyl sulfate are 10154 (±00002) and 10172 (±00003), respectively These results, together with previous peripheral 18O KIE values, are inconsistent with an associative mechanism The isotope effect method we report should also prove useful for studying the mechanism of other sulfuryl group transfers, including sulfatase and sulfotransferase reactions, as well as sulfate hydrolyses under other conditionsread more
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Microbiota Modulate Behavioral and Physiological Abnormalities Associated with Neurodevelopmental Disorders
Elaine Y. Hsiao,Sara Mcbride,Sophia Hsien,Gil Sharon,Embriette R. Hyde,Tyler McCue,Julian A. Codelli,Janet Chow,Sarah E. Reisman,Joseph F. Petrosino,Paul H. Patterson,Sarkis K. Mazmanian +11 more
TL;DR: A gut-microbiome-brain connection in a mouse model of ASD is supported and a potential probiotic therapy for GI and particular behavioral symptoms in human neurodevelopmental disorders is identified.
Journal ArticleDOI
Sulfur(VI) Fluoride Exchange (SuFEx): Another Good Reaction for Click Chemistry
TL;DR: It is shown that proton or silicon centers can activate the exchange of S�F bonds for SO bonds to make functional products, and that the sulfate connector is surprisingly stable toward hydrolysis.
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Sulfotransferases: structure, mechanism, biological activity, inhibition, and synthetic utility.
TL;DR: Progress in the elucidation of the structures and mechanisms of sulfotransferases, as well as their biological activity, inhibition, and synthetic utility, are discussed in this Review.
Journal ArticleDOI
Enzymatic mechanisms of phosphate and sulfate transfer.
References
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Journal ArticleDOI
Online Sulfur-Isotope Determination Using an Elemental Analyzer Coupled to a Mass Spectrometer
TL;DR: In this paper, an online method for S-isotope analysis is described, where samples are combusted in an elemental analyzer and SO 2 is separated from other combustion gases by gas chromatography, and the gases enter the ion source of the mass spectrometer through a split interface.
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DIrect measurement of transition-state bond cleavage in hydrolysis of phosphate esters of p-nitrophenol
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