July 6, 2020

Integrantes. Fidel Campos. Ma. Ignacia Concha. Daniel Navarro. Cristóbal Rojas. Mariana Román. Camila Urra. Francisco Veloso. Disease definition. Hereditary orotic aciduria is an extremely rare (less than 20 cases identified worldwide) autosomal recessive disorder characterized by. Laboratorio Malattie del Metabolismo e Screening Neonatale; II Clinica Pediatrica; Ospedale Regionale per le Microcitemie; Via Jenner; CAGLIARI.

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Orotic acid is a heterocyclic compound and an acid ; it is also known as pyrimidinecarboxylic acid.

Historically it was believed to be part of the vitamin B complex and was called vitamin B 13but it is now known that it is not a vitamin. The compound is manufactured in the body via a mitochondrial enzyme, dihydroorotate dehydrogenase [1] or a cytoplasmic enzyme of pyrimidine synthesis pathway.

It is sometimes used as a mineral carrier in some dietary supplements to increase their bioavailabilitymost commonly for lithium orotate.


Dihydroorotate is synthesized to orotic acid by the enzyme dihydroorotate dehydrogenase, where it later combines with phosphoribosyl pyrophosphate PRPP to form orotidine-5′-monophosphate OMP.

Meaning of “aciduria” in the Spanish dictionary

A distinguishing characteristic of pyrimidine synthesis is that the pyrimidine ring is fully synthesized before being attached to the ribose sugarwhereas purine synthesis happens by building the base directly on the sugar. Orotic acid can be mutagenic in mammalian somatic cells.

It is also mutagenic for bacteria and yeast. A buildup of orotic acid can lead to orotic aciduria and acidemia.

Orphanet: Diagnosi biochimica dell aciduria orotica ereditaria

It may be a symptom of an increased ammonia load due to a metabolic disordersuch as a urea cycle disorder. In ornithine transcarbamoylase deficiencyan X-linked inherited and the most common urea cycle disorder, excess carbamoyl phosphate is converted into orotic acid. This leads to an increased serum ammonia level, increased serum and urinary orotic acid levels and a decreased serum blood urea nitrogen level.

This also leads to oroyica increased urinary orotic acid excretion, because the orotic acid is not being properly utilized and must be eliminated. The hyperammonemia depletes alpha-ketoglutarate leading to the inhibition of the tricarboxylic acid cycle TCA decreasing adenosine triphosphate ATP production.


From Wikipedia, the free encyclopedia. Hypoxanthine Xanthine Uric acid 5-Hydroxyisourate. Carbamoyl phosphate Carbamoyl aspartic acid 4,5-Dihydroorotic acid Orotic acid Orotidine 5′-monophosphate Uridine monophosphate. Retrieved from ” https: Views Read Edit View history.

Aciduria Orótica by Mariana Román on Prezi

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Wikimedia Commons has media related to Orotic acid. Anabolism Carbamoyl phosphate Carbamoyl aspartic acid 4,5-Dihydroorotic acid Orotic acid Orotidine 5′-monophosphate Uridine monophosphate.

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