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D7128

Sigma-Aldrich

L-Dihydroorotic acid

≥99%

Synonym(s):

2,6-Dioxohexahydro-4-pyrimidinecarboxylic acid, L-Hydroorotic acid, Dihydro-L-orotic acid

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About This Item

Empirical Formula (Hill Notation):
C5H6N2O4
CAS Number:
5988-19-2
Molecular Weight:
158.11
MDL number:
MFCD00085339
UNSPSC Code:
12352204
PubChem Substance ID:
24894080
NACRES:
NA.83

Assay

≥99%

form

powder

mp

254-255 °C (dec.) (lit.)

SMILES string

OC(=O)[C@@H]1CC(=O)NC(=O)N1

InChI

1S/C5H6N2O4/c8-3-1-2(4(9)10)6-5(11)7-3/h2H,1H2,(H,9,10)(H2,6,7,8,11)/t2-/m0/s1

InChI key

UFIVEPVSAGBUSI-REOHCLBHSA-N

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Application

L-Dihydroorotic acid has been used as a substrate in dihydroorotate dehydrogenase (DHODH) assay.

Biochem/physiol Actions

L-Dihydroorotic acid (DHO) serves as a substrate for dihydroorotate dehydrogenase (DHODH), an enzyme in the de novo synthesis of pyrimidine. Inhibition of DHOH by its inhibitors causes a large accumulation of upstream metabolite DHO and a reduction in the uridine levels. Therefore, DHO and uridine can be used as biomarkers for pyrimidine synthesis for the clinical development of DHOH inhibitors.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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Feng Yin et al.
Journal of pharmaceutical and biomedical analysis, 192, 113669-113669 (2020-10-30)
Uridine and L-dihydroorotate (DHO) are important intermediates of de novo as well as salvage pathways for the biosynthesis of pyrimidines, which are the building blocks of nucleic acids - DNA and RNA. These metabolites are known to be significant biomarkers
Mihwa Lee et al.
Journal of molecular biology, 348(3), 523-533 (2005-04-14)
Escherichia coli dihydroorotase has been crystallized in the presence of the product, L-dihydroorotate (L-DHO), and the structure refined at 1.9A resolution. The structure confirms that previously reported (PDB entry 1J79), crystallized in the presence of the substrate N-carbamyl-D,L-aspartate (D, L-CA-asp)
O Björnberg et al.
Archives of biochemistry and biophysics, 391(2), 286-294 (2001-07-05)
The flavoprotein dihydroorotate dehydrogenase (DHOD) catalyzes the oxidation of dihydroorotate to orotate. Dihydrooxonate is an analogue of dihydroorotate in which the C5 carbon is substituted by a nitrogen atom. We have investigated dihydrooxonate as a substrate of three DHODs, each
Laura Martorano et al.
Disease models & mechanisms, 12(3) (2019-03-06)
Mitochondrial DNA depletion syndromes (MDS) are a group of rare autosomal recessive disorders with early onset and no cure available. MDS are caused by mutations in nuclear genes involved in mitochondrial DNA (mtDNA) maintenance, and characterized by both a strong
Michelle L Zaharik et al.
Microbiology (Reading, England), 153(Pt 8), 2472-2482 (2007-07-31)
Mutants capable of utilizing the pyrimidine biosynthetic intermediates carbamoylaspartate and dihydroorotate for growth were derived from pyrimidine auxotrophs of Salmonella enterica serovar Typhimurium LT2. The gain-of-function phenotypes both resulted from mutations in a single gene, yhiT, the third gene of
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