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Updated: May 17, 2026

Visualization of ATP Synthase Dimers in Mitochondria by Electron Cryo-tomography
Published on: September 14, 2014
ATP cleavage by cone tetraguanidinocalix[4]arene
Riccardo Salvio1, Alessandro Casnati, Luigi Mandolini
1Dipartimento di Chimica and IMC-CNR Sezione Meccanismi di Reazione, Università La Sapienza, 00185 Roma, Italy. riccardo.salvio@uniroma1.it
Abstract:
The upper rim cone tetraguanidinocalix[4]arene 1 is a highly effective catalyst of ATP hydrolysis. The catalytically most active species is the triprotonated form of the catalyst. The three protonated guanidinium groups provide the electrostatic driving force for substrate binding and activation, while the neutral guanidine most likely acts as a nucleophilic catalyst.
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