Adenosine triphosphate phosphate exchange

Carmeli C and Avron M (1967) A light-triggered adenosine triphosphate-phosphate exchange reaction in chloroplasts, Eur.J.Biochem. 2, 318-326. McCarty RErFagan J (1973) Light stimulated incorporation of N-Ethylmale mide into coupling factor 1 in spinach chloroplasts. Biochemistry 12, 1503-1507. ... 

Phosphoribosylpyrophosphate (PRPP) synthetase is one of the very few enzymes which transfer a pyrophosphoryl group from ATP in one step. When the synthesis is carried out in lsO-enriched water, lsO is incorporated into the PRPP, but not into AMP.91 The lsO in the PRPP arises from a pre-exchange between the H2180 and the ribose phosphate, and hence the results confirm that fission of the /5-P—O bond takes place. PRPP and ATP are starting materials in the biosynthesis of histidine, and Ai-(5 -phospho-D-ribosyl)adenosine triphosphate (29) is an intermediate. The... 

The nucleotide anhydride, adenosine 5 -triphosphate (24), when digested with aqueous barium hydroxide, gives a complex mixture containing such products as adenine, adenosine, adenosine 2 -, 3 -, and 5 -phosphates, adenosine 5 -pyrophosphate, and adenosine 2 (or 3 ),5 -diphosphate. - In addition, a nucleotide was foimd in this digest whose structure proved - to be that of adenosine 3 5 -cyclic phosphate (25). This component did not consume metaperiodate, and was degraded enzymically to adenosine 5 -phosphate (26) and adenosine 3 -phosphate (27), without the formation of adenosine 2 -phosphate. Hydrolysis of (25) with an acidic ion-exchange resin did, however, produce the 2 - and 3 -phosphates of adenosine. Compound (25) possessed only one phosphoryl dissociation, and showed a ratio of nucleoside to phosphate of 1 1, which, along with a molecular-... 

Anion adsorption is more sensitively dependent on the type of particle aggregation and the degree of dispersion than cation exchange reactions because formation of edge/face contacts blocks edge sites for anion adsorption. The adsorption of adenosine triphosphate on smaller sized fractions of montmorillonite increased after addition of traces of phosphate which break the edge/face contacts and make additional adsorption sites available [24]. 

Sleep, J. A., and Hutton, R. L. (1980). Exchange between inorganic phosphate and adenosine 5 -triphosphate in the medium by actomyosin subfragment 1. Biochemistry 19, 1276-1283. 

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