Biosynthesis of the cyanobacterial reserve polymer multi-L-arginyl-poly-L-aspartic acid (cyanophycin)
نویسندگان
چکیده
منابع مشابه
PII-regulated arginine synthesis controls accumulation of cyanophycin in Synechocystis sp. strain PCC 6803.
Cyanophycin (multi-L-arginyl-poly-L-aspartic acid) is a nitrogen storage polymer found in most cyanobacteria and some heterotrophic bacteria. The cyanobacterium Synechocystis sp. strain PCC 6803 accumulates cyanophycin following a transition from nitrogen-limited to nitrogen-excess conditions. Here we show that the accumulation of cyanophycin depends on the activation of the key enzyme of argin...
متن کاملCyanophycin granule polypeptide formation and degradation in the cyanobacterium Aphanocapsa 6308.
The effect of a number of conditions on the amount of cyanophycin granule polypeptide [multi-L-arginyl poly(L-aspartic acid)] formed in the unicellular cyanobacterium Aphanocapsa 6308 was determined. Light, CO2, sulfur, and phosphorus starvation as well as the addition of arginine to culture media increased the amount of cyanophycin granule polypeptide in cells when compared with that in cells ...
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Copolymers of poly(butylene succinate) (PBS) with amino acids were produced from succinic acid (1), 1,4-butanediol (2) and 1 mol% of various amino acids. Their reaction time and molecular weight, as well as thermal and mechanical properties, were studied. The reaction time for polymerization was found to increase as the amount of amino acid was increased, except when L-aspartic acid (3) was use...
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The aspartase overproducing mutant B-715 was used as a donor of the aspartase gene for further construction of the aspartase-hyperproducing strains by molecular cloning. In preliminary experiments activity of transformants and their efficiency in L-aspartic acid biosynthesis were compared. The conditions for recombinant strain multiplication, biomass activation and L-aspartic acid biosynthesis ...
متن کاملMetabolism of L-aspartic acid.
Aspartic acid, like glutamic acid, occupies a central position in amino acid metabolism. In most tissues it takes part in the transamination reaction (1). In the liver and the kidney, where all amino acids undergo cleamination, the rate of this process for aspartic acid is second only to glutamic acid (2). For these reasons, one would expect the exchange of amino nitrogen of aspartic acid with ...
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ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 2000
ISSN: 0014-2956
DOI: 10.1046/j.1432-1327.2000.01622.x