RESUMO
Recent, NMR and precipitation, studies of molecular recognition of proline-rich proteins and peptides by plant polyphenols are described and rationalized. The action of polysaccharides and caseins in the moderation of the astringent response, which is engendered by polyphenols present in foodstuffs and beverages, is described. The possible influence of plant cell wall glycoproteins on the process of lignification is discussed in the light of the observed affinity of phenolic substrates for prolyl residues in protein structures.
Assuntos
Adstringentes/química , Flavonoides , Peptídeos/química , Fenóis/química , Polímeros/química , Sequência de Aminoácidos , Caseínas/química , Precipitação Química , Lignina/química , Espectroscopia de Ressonância Magnética , Dados de Sequência Molecular , Plantas/química , Polifenóis , Polissacarídeos/química , Domínios Proteicos Ricos em Prolina , CháRESUMO
The polyphenol composition of some traditional herbal remedies is reviewed. Polyphenols probably act in such remedies by virtue of their astringent action and current views on the molecular basis of this property are outlined and discussed.