How to see CO2 too: Photodecarboxylation of 3‐nitrophenyl acetic acid has been used to release CO2 in aqueous thin‐layer samples. CO2 and its reactions can then be measured directly and conveniently by time‐resolved infrared spectroscopy.
Conformational Dynamics and Allostery in Pyruvate Kinase
作者:Katherine A. Donovan、Shaolong Zhu、Peter Liuni、Fen Peng、Sarah A. Kessans、Derek J. Wilson、Renwick C.J. Dobson
DOI:10.1074/jbc.m115.676270
日期:2016.4
mass spectrometry coupled to hydrogen-deuteriumexchange studies, followed by mutagenic analysis to test the activation mechanism. Global exchange experiments, supported by thermostability studies, demonstrate that fructose-1,6-bisphosphate binding to the allosteric domain causes a shift towards a globally more dynamic ensemble of conformations. Mapping deuterium exchange to peptides within the enzyme
Mechanistic Studies on Tryptophan Lyase (NosL): Identification of Cyanide as a Reaction Product
作者:Dhananjay M. Bhandari、Dmytro Fedoseyenko、Tadhg P. Begley
DOI:10.1021/jacs.7b09000
日期:2018.1.17
Tryptophanlyase (NosL) catalyzes the formation of 3-methylindole-2-carboxylic acid and 3-methylindole from l-tryptophan. In this paper, we provide evidence supporting a formate radical intermediate and demonstrate that cyanide is a byproduct of the NosL-catalyzed reaction with l-tryptophan. These experiments require a major revision of the NosL mechanism and uncover an unanticipated connection between