Heterometallic manganese/zinc-phytate complex as a model compound for metal storage in wheat grains

dc.creatorRodrigues-Filho, UP
dc.creatorVaz, S
dc.creatorFelicissimo, MP
dc.creatorScarpellini, M
dc.creatorCardoso, DR
dc.creatorVinhas, RCJ
dc.creatorLanders, R
dc.creatorSchneider, JF
dc.creatorMcGarvey, BR
dc.creatorAndersen, ML
dc.creatorSkibsted, LH
dc.date2005
dc.dateOCT
dc.date2014-11-18T19:33:19Z
dc.date2015-11-26T17:53:29Z
dc.date2014-11-18T19:33:19Z
dc.date2015-11-26T17:53:29Z
dc.date.accessioned2018-03-29T00:37:02Z
dc.date.available2018-03-29T00:37:02Z
dc.identifierJournal Of Inorganic Biochemistry. Elsevier Science Inc, v. 99, n. 10, n. 1973, n. 1982, 2005.
dc.identifier0162-0134
dc.identifierWOS:000232642600006
dc.identifier10.1016/j.jinorgbio.2005.06.014
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/68297
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/68297
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/68297
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1290532
dc.descriptionMyo-inositol-1,2.3,4,5.6-hexakisphosphate, also known as phytate, is a natural metal chelate present in cereals, an important feedstock worldwide. This article reports the characterization of three metal storage model complexes: the homometallic Mn(II) myo-inositol-1,2,3,4,5,6-hexakisphosphate (IP6), the heterometallic Zn(II), Mn(II) analogue Na4MnZn4(C6H6O24P6) (NO3)(2)-8H(2)O (MnZn(4)IP6) and the homometallic Zn(II) metal complex Na3Zn5(C6H6O24P6)OH-9H(2)O (Zn(5)IP6). The techniques of high-resolution Na-23, C-13 and P-31 NMR, electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS) were applied in this study. The complexation of Zn(II) and Mn(II) by phosphate groups of IP6 is demonstrated by NMR and XPS results. C-13 NMR results show a conformation for IP6 consisting of five equatorial phosphate groups to one axial group showing only one chemical environment for Zn and two for Mn, when characterized by XPS and EPR, in both Mn complexes. These results support, for the first time, a probable supramacromolecular structure for phytate complexes of transition metals. Based on the similarity between the EPR spectra of wheat seeds and that of the MnZn(4)IP6 compound, the manganese storage centers in wheat grains can be assigned to similar heterometallic phytate complexes. (c) 2005 Elsevier Inc. All rights reserved.
dc.description99
dc.description10
dc.description1973
dc.description1982
dc.languageen
dc.publisherElsevier Science Inc
dc.publisherNew York
dc.publisherEUA
dc.relationJournal Of Inorganic Biochemistry
dc.relationJ. Inorg. Biochem.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectwheat
dc.subjectmanganese storage compounds
dc.subjectZn(II) storage compounds
dc.subjectmyo-inositol-1,2,3,4,5,6-hexakisphosphate
dc.subjectphytate
dc.subjectEPR
dc.subjectXPS
dc.subjectMAS NMR
dc.subjectmetal storage in plants
dc.subjectmanganese bioavailability
dc.subjectElectron-spin-resonance
dc.subjectNuclear-magnetic-resonance
dc.subjectPhytic Acid
dc.subjectAqueous-solution
dc.subjectRadical Formation
dc.subjectP-31 Nmr
dc.subjectIon
dc.subjectGlasses
dc.subjectPhosphorus
dc.subjectAbsorption
dc.titleHeterometallic manganese/zinc-phytate complex as a model compound for metal storage in wheat grains
dc.typeArtículos de revistas


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