Abstract:
:CDP-diglyceride:inositol transferase in endoplasmic reticulum fractions from castor bean (Ricinus communis) endosperm was partially characterized. The enzyme had a pH optimum of 8.5 and required Mn(2+) for activity. Maximal activity was at 1.5 millimolar MnCl(2). A K(m) of 0.30 mM was calculated for myo-inositol and 1.35 millimolar was estimated for CDP-dipalmitoylglyceride. Concentrations of CDP-dipalmitoylglyceride above 1.2 millimolar inhibited the enzyme. A deoxycholate concentration of 0.1% (w/v) stimulated the reaction slightly while Triton X-100 inhibited at all concentrations tested. Some incorporation of myo-inositol into phosphatidylinositol occurred in the absence of CDP-diglyceride.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Sexton JC,Moore TSdoi
10.1104/pp.62.6.978subject
Has Abstractpub_date
1978-12-01 00:00:00pages
978-80issue
6eissn
0032-0889issn
1532-2548journal_volume
62pub_type
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