Metal binding to pyridoxal derivatives. An NMR study of the interaction of Eu(III) with pyridoxal phosphate and pyridoxamine phosphate

作者: B. N. Narasinga Rao , C. Ramakrishnan , P. Balaram

DOI: 10.1007/BF02702885

关键词: CrystallographyPhosphateInorganic chemistryPyridoxalSlow exchangeMoietyLanthanidePyridoxamine phosphatePyridoxal phosphateChemistryMetal bindingGeneral Biochemistry, Genetics and Molecular BiologyGeneral Agricultural and Biological SciencesGeneral Medicine

摘要: The solution conformations of pyridoxal-5’-phosphate and pyridoxamine-5’-phosphate have been investigated using Eu(III) as a nuclear magnetic resonance shift probe. Binding to pyridoxal phosphate results in the formation two complexes, at group \alpha-hydroxy-aldehyde moiety, which are slow exchange on time-scale. lanthanide-induced pseudo contact shifts calculated McConnell-Robertson equation. (J. Chem. Soc. (1950), 22, 1561) good agreement with experimentally observed values for both pyridoxamine lead family closely related conformations.

参考文章(19)
C.D. Barry, C.M. Dobson, D.A. Sweigart, L.E. Ford, R.J.P. Williams, THE STRUCTURE OF A CHOLESTEROL: SHIFT REAGENT COMPLEX IN SOLUTION Nuclear Magnetic Resonance Shift Reagents. pp. 173- 195 ,(1973) , 10.1016/B978-0-12-643050-9.50013-0
Esmond E. Snell, Chemical structure in relation to biological activities of vitamin B6. Vitamins and Hormones Series. ,vol. 16, pp. 77- 125 ,(1958) , 10.1016/S0083-6729(08)60314-3
F. Giordano, L. Mazzarella, Crystal and molecular structure of pyridoxamine‐5'‐phosphate hydrochloride Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. ,vol. 27, pp. 128- 134 ,(1971) , 10.1107/S056774087100178X
R. P. Bell, M. H. Rand, K. M. A. Wynne-Jones, Kinetics of the hydration of acetaldehyde Transactions of the Faraday Society. ,vol. 52, pp. 1093- 1102 ,(1956) , 10.1039/TF9565201093
G. A. Bentley, J. M. Waters, T. N. Waters, The crystal structure of (±)-phenylalanine-(pyridoxylidine 5-phosphate)copper(II) Chemical Communications (london). pp. 988- 989 ,(1968) , 10.1039/C19680000988
J. F. Cutfield, D. Hall, T. N. Waters, The crystal structure of copper(II) pyridoxylidene (±)-valine complex Chem. Commun. (London). ,vol. 0, pp. 785- 786 ,(1967) , 10.1039/C19670000785