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Title: Structural characterization of agmatine at physiological conditions
Authors: Toninello, Antonio 
Battaglia, Valentina 
Salvi, Mauro 
Calheiros, Rita 
Marques, M. Paula M. 
Issue Date: 2006
Citation: Structural Chemistry. 17:2 (2006) 163-175
Abstract: Abstract The present work aims at determining the structure–activity relationships (SAR’s) which rule the biological function of agmatine (4-(aminobutyl)guanidinium, AGM), a biogenic amine produced by decarboxylation of arginine. Its structural preferences, both as an isolated molecule and in aqueous solution (namely at physiological conditions) were ascertained, by vibrational (Raman) spectroscopy coupled to theoretical (density functional) calculations. An evaluation of mitochondrial functions (membrane potential (??), mitochondrial swelling, and cytochrome c release) in rat liver mitochondria (RLM) was also carried out. The results thus obtained, coupled to the conformational analysis performed for the distinct polyamine protonation states, allowed to individualize the agmatine structures which interact with the mitochondrial site responsible for its transport and for the protection against mitochondrial permeability transition (MPT) induction, as well as to gain information on the specific mechanisms involved.
DOI: 10.1007/s11224-006-9025-1
Rights: openAccess
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais

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