title: Interaction of coffee compounds with serum albumins. Part II: Diterpenes.
abstract: Cafestol and 16-O-methylcafestol are diterpenes present in coffee, but whilst cafestol is found in both Coffea canephora and Coffea arabica, 16-O-methylcafestol (16-OMC) was reported to be specific of only C. canephora. The interactions of such compounds, with serum albumins, have been studied. Three albumins have been considered, namely human serum albumin (HSA), fatty acid free HSA (ffHSA) and bovine serum albumin (BSA). The proteins interact with the diterpenes at the interface between Sudlow site I and the fatty acid binding site 6 in a very peculiar way, leading to a significant change in the secondary structure. The diterpenes do not displace reference binding drugs of site 2, but rather they enhance the affinity of the site for the drugs. They, therefore, may alter the pharmacokinetic profile of albumin - bound drugs.
authors.affiliation: Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, via L. Giorgieri 1, 34127 Trieste, Italy; Illycaffè S.p.A., via Flavia 110, 34147 Trieste, Italy. Electronic address: elena.guercia@illy.com.
authors.forename: Elena
authors.initials: E
authors.lastname: Guercia
authors.affiliation: Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, via L. Giorgieri 1, 34127 Trieste, Italy.
authors.forename: Cristina
authors.initials: C
authors.lastname: Forzato
authors.affiliation: Illycaffè S.p.A., via Flavia 110, 34147 Trieste, Italy.
authors.forename: Luciano
authors.initials: L
authors.lastname: Navarini
authors.affiliation: Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, via L. Giorgieri 1, 34127 Trieste, Italy. Electronic address: fberti@units.it.
authors.forename: Federico
authors.initials: F
authors.lastname: Berti
mesh_terms: D003069:Coffee / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry*; D006801:Humans; D012709:Serum Albumin / Q000737:chemistry*; D012710:Serum Albumin, Bovine / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D003069:Coffee; D004224:Diterpenes; D012709:Serum Albumin; D012710:Serum Albumin, Bovine
keywords: Bovine serum albumin; Coffee; Diterpenes; Fluorescence spectroscopy; Human serum albumin