Purine Functions
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Purine is a heterocyclic aromatic organic compound that consists of two rings (pyrimidine and imidazole) fused together. It is water-soluble. Purine also...
Nucleobase (section Modified purine nucleobases)have a fused-ring skeletal structure derived of purine, hence they are called purine bases. The purine nitrogenous bases are characterized by their single...
Adenine (redirect from 6-Amino-purine)Adenine (/ˈædɪnɪn/) (symbol A or Ade) is a purine nucleobase. It is one of the four nucleobases in the nucleic acids of DNA, the other three being guanine...
Purine nucleoside phosphorylase, PNP, PNPase or inosine phosphorylase (EC 2.4.2.1) is an enzyme that in humans is encoded by the NP gene. It catalyzes...
Nucleotide (section Purine ribonucleotide synthesis)linked. Purines, however, are first synthesized from the sugar template onto which the ring synthesis occurs. For reference, the syntheses of the purine and...
The Purine Nucleotide Cycle is a metabolic pathway in protein metabolism requiring the amino acids aspartate and glutamate. The cycle is used to regulate...
ammonium acid urate. Uric acid is a product of the metabolic breakdown of purine nucleotides, and it is a normal component of urine. High blood concentrations...
Alkaloid (redirect from Purine alkaloid)This group includes terpene-like and steroid-like alkaloids, as well as purine-like alkaloids such as caffeine, theobromine, theacrine and theophylline...
the following reactions: HGPRTase functions primarily to salvage purines from degraded DNA to reintroduce into purine synthetic pathways. In this role...
A purine riboswitch is a sequence of ribonucleotides in certain messenger RNA (mRNA) that selectively binds to purine ligands via a natural aptamer domain...
Ribonucleotide (section Function)uracil (U). The nitrogenous bases are classified into two parent compounds, purine and pyrimidine. The general structure of a ribonucleotide consists of a...
Guanosine-5'-triphosphate (GTP) is a purine nucleoside triphosphate. It is one of the building blocks needed for the synthesis of RNA during the transcription...
Adenosine deaminase (section Function)in purine metabolism. It is needed for the breakdown of adenosine from food and for the turnover of nucleic acids in tissues. Its primary function in...
allopurinol's effect. Allopurinol is a purine analog; it is a structural isomer of hypoxanthine (a naturally occurring purine in the body) and is an inhibitor...- Nucleoside triphosphate (section Purine synthesis)novo. The synthesis of ATP and GTP (purines) differs from the synthesis of CTP, TTP, and UTP (pyrimidines). Both purine and pyrimidine synthesis use phosphoribosyl...
One or more phosphate groups. The nitrogen bases adenine and guanine are purine in structure and form a glycosidic bond between their 9 nitrogen and the...- reactivity was governed by physico-chemical processes. RNA is composed of purine and pyrimidine nucleotides, both of which are necessary for reliable information...
Purine-rich element binding protein G is a protein that in humans is encoded by the PURG gene. The exact function of this gene is not known, however,...
Lesch–Nyhan syndrome (category Inborn errors of purine-pyrimidine metabolism)fluids. The combination of increased synthesis and decreased utilization of purines leads to high levels of uric acid production. This results in both high...
Caffeine (redirect from 1,3,7-trimethyl-1H-purine-2,6(3H,7H)-dione 3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6-dione)inhibition of phosphodiesterase. Caffeine is a bitter, white crystalline purine, a methylxanthine alkaloid, and is chemically related to the adenine and...
- order, and it now seems probable that all ordinary nucleic acids yield two purine bases, adenine and guanine; two pyrimidine bases, cytosine and thymine and
- == What is a Purine? == The name was invented by the German chemist Emil Fischer in 1884. A purine is a nucleotide (a nucleoside + phosphate group) that