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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Characterization of NADP-dependent malic enzyme from developing castor oil seed endosperm.

Metabolic pathways sequestered within the leucoplast of developing oilseeds ensure a balanced supply of substrates and cofactors for fatty acid biosynthesis. NADP-dependent malic enzyme ( NADP-ME) may be important in supplying both carbon and NADPH for fatty acid biosynthesis in the developing endosperm of the oilseed Ricinus communis. NADP-ME was purified 5160-fold to a specific activity of 18.2 U/mg protein. NADP-ME is a homotetramer with a native mass of 254 kDa and a subunit size of approximately 63 kDa. Effectors of castor NADP-ME are typical of the NADP-malic enzymes, with the exception of acetyl-CoA and its derivatives, which were found to act as activators. This is consistent with a regulatory role for these molecules during fatty acid biosynthesis in vivo. NADP-ME was found to have maximal activity at stage 7 of endosperm development, coincident with maximal lipid accumulation.[1]

References

  1. Characterization of NADP-dependent malic enzyme from developing castor oil seed endosperm. Shearer, H.L., Turpin, D.H., Dennis, D.T. Arch. Biochem. Biophys. (2004) [Pubmed]
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