A novel dimeric oxovanadium (IV) species identified in Saccharomyces cerevisiae cells.
Saccharomyces cerevisiae cells stored oxovanadium (IV) ions in a dimeric form. In the late stationary phase Saccharomyces cerevisiae cells grown in rich medium containing concentrations of oxovanadium (V), orthovanadate from 12 to 18 mM, causing growth stasis, a dimeric oxovanadium (IV) species was identified by EPR spectroscopy. The EPR spectrum exhibited at 110 K the low-field forbidden deltaMs = +/-2 transition at g around 4 and the half-field deltaMs = +/-1 15-lines feature at g around 2 out of the presence of a triplet state by the coupling of the oxovanadium (IV) ions in a dimeric form. Hyperfine splitting of 75.2 x 10(-4) cm(-1) and an interionic distance of about 4.4 angstroms was calculated. The dimeric species was localized in the cellular cytoplasmic space.
Zoroddu
M A
MA
Dipartimento di Chimica, Università di Sassari, Italy. zoroddu@ssmain.uniss.it
Masia
A
A
D003470:Culture Media; D019281:Dimerization; D004578:Electron Spin Resonance Spectroscopy; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism; D014638:Vanadates / Q000032:analysis / Q000378:metabolism* / Q000494:pharmacology
D003470:Culture Media; C075743:oxovanadium IV; D014638:Vanadates