pyrimidine

Pyrimidine (Metadiazine)s are heterocyclic, six-membered, nitrogen-containing carbon ring structures, with uracil, cytosine and thymine being the basal structures of ribose-containing nucleosides (uridine, cytidine, and thymidine respectively), or deoxyribose-containing deoxynucleosides, and their corresponding ribonucleotides or deoxyribonucleotides. Pyrimidines serve essential functions in human metabolism as ribonucleotide bases in RNA (uracil and cytosine), and as deoxyribonucleotide bases in DNA (cytosine and thymine), and are linked by phosphodiester bridges to purine nucleotides in double-stranded DNA, in both the nucleus and the mitochondria. Pyrimidine activated sugars are also involved in polysaccharide and phospholipid synthesis, glucuronidation in detoxification processes, glycosylation of proteins and lipids and in the recently identified novel endothelium-derived vasoactive dinucleotides.

4-Amino-5-Bromopyrrolo[2,3-D]Pyrimidine (5-bromo-1H-pyrrolo[2,3-d]pyrimidin-4-amine) is a marine derived natural products found in Echinodictyum sp.

Orotic acid monohydrate is an intermediate product in pyrimidine metabolism.

Purine (7H-Imidazo(4,5-d)pyrimidine) is a heterocyclic aromatic organic compound, consisting of a pyrimidine ring fused to an imidazole ring. Two of the bases in nucleic acids, adenine and guanine, are purines. Purines from food (or from tissue turnover) are metabolised by several enzymes, including xanthine oxidase, into uric acid. High levels of uric acid can predispose to gout when the acid crystalises in joints; this phenomenon only happens in humans and some animal species (e.g. dogs) that lack an intrinsic uricase enzyme that can further degrade uric acid.

5-Methyl-2'-deoxycytidine (5MedCyd) is a pyrimidine nucleoside that when incorporated into single-stranded DNA can act in cis to signal de novo.

Uracil is a common naturally occurring pyrimidine found in RNA, it base pairs with adenine and is replaced by thymine in DNA. Methylation of uracil produces thymine. Uracil's use in the body is to help carry out the synthesis of many enzymes necessary for cell function through bonding with riboses and phosphates. Uracil serves as allosteric regulator and coenzyme for many important biochemical reactions.

2,4-Dihydroxypyrimidine-5-carboxylic acid (Isoorotic acid) has been obtained from 5-formyluracil by the action of enzyme, thymine 7-hydroxylase. 2,4-Dihydroxypyrimidine-5-carboxylic acid has been used to synthesize N1-alkylated uracil derivatives.

Deoxycytidine triphosphate is a nucleoside triphosphate.It is a raw material in DNA synthesis. Deoxycytidine triphosphate has many applications, such as real-time PCR, cDNA synthesis, and DNA sequencing.

Orotic acid zinc (Zinc Orotate) salt dihydrate is an intermediate product in pyrimidine synthesis.

Flucytosine (NSC 103805) is a pyrimidine compound and a fluorinated cytosine analog exhibiting antifungal activity.

Orotidine 5'-monophosphate trisodium, a pyrimidine nucleotide, is synthesized through the de novo DNA synthesis pathway by various microorganisms, including M. tuberculosis, S. cerevisiae, S. typhimurium, and P. falciparum. The compound's production involves orotate phosphoribosyltransferase (OPRT)-catalyzed reactions using phosphoribosyl pyrophosphate (PRPP) and orotic acid (OA) as substrates [1].

Orotidine 5′-monophosphate, a pyrimidine ribonucleoside, functions as an endogenous metabolite in human, E. coli, and mouse processes. It serves as an intermediate in uridine monophosphate (UMP) biosynthesis and is utilized in researching the mechanism of orotidine 5′-monophosphate decarboxylase.

Convicine, a pyrimidine glycoside found in faba beans [1] [2], serves as the precursor for the aglycones Divicine and Isouramil, alongside Vicine. It is a principal factor in favism, a genetic disorder that causes severe hemolysis following the consumption of faba beans.

Cytidine (Cytosine-1-β-D-ribofuranoside) is a pyrimidine nucleoside comprised of a cytosine bound to ribose via a beta-N1-glycosidic bond. Cytidine is a precursor for uridine. Both cytidine and uridine are utilized in RNA synthesis.

Ureidopropionic acid (3-Ureidopropionic acid) is an intermediate in the metabolism of uracil. More specifically it is a breakdown product of dihydrouracil and is produced by the enzyme dihydropyrimidase. It is further decomposed to beta-alanine via the enzyme beta-ureidopropionase. Ureidopropionic acid is essentially a urea derivative of beta-alanine. High levels of Ureidopropionic acid are found in individuals with beta-ureidopropionase (UP) deficiency. Enzyme deficiencies in pyrimidine metabolism are associated with a risk for severe toxicity against the antineoplastic agent 5-fluorouracil.

2'-Deoxycytidine is one of the major nucleosides of DNA consisting of cytosine and deoxyribose and inhibits the biological effects of bromodeoxyuridine (Brdu). The nucleoside consists only of a pentose sugar attached to a purine or pyrimidine base and has no phosphate group. When N1 is attached to C1 of deoxyribose, deoxyribosides and nucleotides are formed from cytosine and deoxyribose; deoxycytidine monophosphate (dCMP), deoxycytidine diphosphate (dCDP), and deoxycytidine triphosphate (dCTP). cTP is the source of cytosine in RNA (ribonucleic acid) and deoxycytidine triphosphate (dCTP) is the source of deoxycytidine in DNA (deoxyribonucleic acid). Itaconic acid is a polymer.

N-Carbamoyl-DL-aspartic acid (Ureidosuccinic acid) is an intermediary product in pyrimidine biosynthesis.

L-Dihydroorotic acid, also known as (S)-4,5-dihydroorotate or dihydro-L-orotate, belongs to the class of organic compounds known as alpha amino acids and derivatives. Within the cell, L-dihydroorotic acid is primarily located in the cytoplasm and mitochon

3-Amino-2-methylpropanoic acid (α-Methyl-β-alanine) is the product from the conversion of N-carbamyl-beta-aminoisobutyric acid by the enzyme Beta-ureidopropionase (EC 3.5.1.6), the last step in pyrimidine degradation. Beta-ureidopropionase deficiency is an inborn error of pyrimidine degradation associated with neurological abnormalities.

Cytosine (6-Aminopyrimidin-2(1H)-one) is a pyrimidine base that is a fundamental unit of nucleic acids. The deamination of cytosine alone is apparent and the nucleotide of cytosine is the prime mutagenic nucleotide in leukaemia and cancer.

2'-Deoxycytidine is one of the major nucleosides of DNA consisting of cytosine and deoxyribose and inhibits the biological effects of bromodeoxyuridine (Brdu). The nucleoside consists only of a pentose sugar attached to a purine or pyrimidine base and has no phosphate group. When N1 is attached to C1 of deoxyribose, deoxyribosides and nucleotides are formed from cytosine and deoxyribose; deoxycytidine monophosphate (dCMP), deoxycytidine diphosphate (dCDP), and deoxycytidine triphosphate (dCTP). cTP is the source of cytosine in RNA (ribonucleic acid) and deoxycytidine triphosphate (dCTP) is the source of deoxycytidine in DNA (deoxyribonucleic acid). Itaconic acid is a polymer.

NSC-16590 (2-Aminoisobutyric acid) is a nonprotein amino acid (is an end product of pyrimidine Metabolism) excreted in the urine of about 5% of healthy individuals, and high excretion is an autosomal recessive phenotype.

Uridine 5'-monophosphate disodium salt (Disodium UMP) has been used to study the effect of pyrimidine synthesis inhibitor, 5-azacytidine, on cholesterol and lipid metabolism. It has been used to study the effect of nucleotides on growth of specific intestinal bacteria.

Orotic acid (Vitamin B13) is an intermediate product in pyrimidine metabolism.