منابع مشابه
Biosynthesis of guanosine 5'-phosphate. I. Xanthosine 5'-phosphate as an intermediate.
The work of Greenberg (1) and Buchanan et al. (2) has established inosine 5’-phosphate as a key intermediate in the biosynthesis of hypoxanthine in pigeon liver. The recent indication of the enzymic synthesis of adenosine 5’-phosphate from IMP1 (3-5) shows a possible role of IMP as an intermediate in the biosynthesis of other purine nucleotides. In order to investigate the possibility of the en...
متن کاملBiosynthesis of Guanosine Diphosphate D-Rhamnose and Guanosine Diphosphate D-Talomethylose from Guanosine Diphosphate a-*Mannose*
Strain GS, a gram-negative motile bacterium isolated from soil, synthesizes two polysaccharides. The synthesis of a uranic acid-containing polysaccharide is derepressed by high concentrations of Na2SOd, while the synthesis of the polysaccharide containing equal quantities of n-rhamnose and n-talomethylose is repressed by NazS01 (1, 2). L-F’ucose and L-rhamnose are the methylpentoses commonly fo...
متن کاملNonenzymatic formation of guanosine 3':5'-monophosphate from guanosine triphosphate.
We observed the nonenzymatic formation of guanosine 3’:5’-monophosphate (cyclic GMP) from GTP. The reaction was dependent upon heat and was accelerated by divalent cations and creatine phosphate. The formation of cyclic GMP was greater with increased incubation time, temperature, GTP concentration, and pH. All of the divalent cations tested (Mg2+, Mnz+, Ca2+, Ba2+, and Znzf) increased cyclic GM...
متن کاملRibose-5-phosphate biosynthesis in Methanocaldococcus jannaschii occurs in the absence of a pentose-phosphate pathway.
Recent work has raised a question as to the involvement of erythrose-4-phosphate, a product of the pentose phosphate pathway, in the metabolism of the methanogenic archaea (R. H. White, Biochemistry 43:7618-7627, 2004). To address the possible absence of erythrose-4-phosphate in Methanocaldococcus jannaschii, we have assayed cell extracts of this methanogen for the presence of this and other in...
متن کاملInteraction of guanosine cyclic 3',5'-phosphate dependent protein kinase with lin-benzoadenine nucleotides.
Using the activated cGMP-dependent protein kinase in the presence of the phosphorylatable peptide [[Ala34]histone H2B-(29-35)], we found that lin-benzoadenosine 5'-diphosphate (lin-benzo-ADP) was a competitive inhibitor of the enzyme with respect to ATP with a Ki (22 microM) similar to the Kd (20 microM) determined by fluorescence polarization titrations. The Kd for lin-benzo-ADP determined in ...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1958
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)68043-9