Crystal structure of human mitochondrial NAD(P)+-dependent malic enzyme: a new class of oxidative decarboxylases
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چکیده
منابع مشابه
Crystal structure of human mitochondrial NAD(P)+-dependent malic enzyme: a new class of oxidative decarboxylases.
BACKGROUND Malic enzymes catalyze the oxidative decarboxylation of malate to pyruvate and CO2 with the concomitant reduction of NAD(P)+ to NAD(P)H. They are widely distributed in nature and have important biological functions. Human mitochondrial NAD(P)+-dependent malic enzyme (mNAD-ME) may have a crucial role in the metabolism of glutamine for energy production in rapidly dividing cells and tu...
متن کاملStructure and function of malic enzymes, a new class of oxidative decarboxylases.
Malic enzyme is a tetrameric protein with double dimer structure in which the dimer interface is more intimately contacted than the tetramer interface. Each monomeric unit of the enzyme is composed of four structural domains, which show a different folding topology from those of the other oxidative decarboxylases. The active center is located at the interface between domains B and C. For human ...
متن کاملPrimary structure of the maize NADP-dependent malic enzyme.
Chloroplast-localized NADP-dependent malic enzyme (EC 1.1.1.40) (NADP-ME) provides a key activity for the carbon 4 fixation pathway. In maize, nuclear encoded NADP-ME is synthesized in the cytoplasm as a precursor with a transit peptide that is removed upon transport into the chloroplast stroma. We present here the complete nucleotide sequence for a 2184-base pair full-length maize NADP-ME cDNA...
متن کاملPurification, cDNA cloning and heterologous expression of the human mitochondrial NADP(+)-dependent malic enzyme.
Mitochondrial NADP(+)-dependent malic enzyme (ME; EC 1.1.1.39) has been purified to homogeneity and characterized kinetically from bovine heart. Partial amino acid sequence information allowed amplification of a specific bovine cDNA, which was used to isolate a full-length human cDNA of this isoform of ME. The cDNA is 1930 bp long and codes for a protein of 604 amino acids. Comparison of the am...
متن کاملStructural studies of the pigeon cytosolic NADP(+)-dependent malic enzyme.
Malic enzymes are widely distributed in nature, and have important biological functions. They catalyze the oxidative decarboxylation of malate to produce pyruvate and CO(2) in the presence of divalent cations (Mg(2+), Mn(2+)). Most malic enzymes have a clear selectivity for the dinucleotide cofactor, being able to use either NAD(+) or NADP(+), but not both. Structural studies of the human mitoc...
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ژورنال
عنوان ژورنال: Structure
سال: 1999
ISSN: 0969-2126
DOI: 10.1016/s0969-2126(99)80115-4