Találati lista | Tudóstér

001-es BibID:	BIBFORM082466
Első szerző:	Micera, Giovanni
Cím:	Oxovanadium (IV) complexes of phosphates of biological relevance: NAD+, NADP+ and thiamine mono- and diphosphate / G. Micera, D. Sanna, E. Kiss, E. Garribba, T. Kiss
Dátum:	1999
ISSN:	0162-0134
Megjegyzések:	Complex formation between VO(IV) and organic phosphates, NAD+ (β-nicotinamide adenine dinucleotide), NADP+ (β-nicotinamide adenine dinucleotide phosphate), TDP (thiamine diphosphate) and TMP (thiamine monophosphate), has been studied by combined application of pH-potentiometric and spectroscopic (EPR and electronic absorption) techniques. The species formed in aqueous solution have been examined as a function of pH and ligand-to-metal molar ratio. Different behaviour was found for the ligands. NAD+ acts as a diphosphate chelator in the acidic pH range, whereas in basic media the binding of the metal ion at the deprotonated hydroxyls of the ribose moieties is strongly favoured. The presence of a basic monophosphate group on the ribose residue of NADP+ affects the speciation processes and the ligand behaves as a simple monophosphate in the acidic pH range. Also different is the behaviour of TDP and TMP. While the former behaves as a simple diphosphate ligand, the latter gives rise to monophosphate complexes. In particular, TMP yields stable dinuclear species in which the ligand acts as a bridge between two VO (IV) ions by coordinating through both phosphate and N(1') donor groups.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Journal of Inorganic Biochemistry. - 75 : 4 (1999), p. 303-309. -
További szerzők:	Sanna, Daniele (1956-) (vegyész) Kiss Erzsébet Garribba, Eugenio Kiss Tamás
Pályázati támogatás:	OTKA T23776 OTKA FKFP 0013 egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: