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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
Mark A Anderson et al.
Biochemistry, 45(23), 7132-7139 (2006-06-07)
In the pyrimidine biosynthetic pathway, N-carbamyl-L-aspartate (CA-asp) is converted to L-dihydroorotate (DHO) by dihydroorotase (DHOase). The mechanism of this important reaction was probed using primary and secondary 15N and 13C isotope effects on the ring opening of DHO using isotope
E Takashima et al.
Parasitology international, 50(4), 273-278 (2001-11-24)
Using N2 cavitation, we established a protocol to prepare the active mitochondria from Plasmodium falciparum showing a higher succinate dehydrogenase activity than previously reported and a dihydroorotate-dependent respiration. The fact that fumarate partially inhibited the dihydroorotate dependent respiration suggests that
Thuc T Le et al.
Journal of lipid research, 54(4), 1044-1057 (2013-01-29)
We report in this study an intrinsic link between pyrimidine metabolism and liver lipid accumulation utilizing a uridine phosphorylase 1 transgenic mouse model UPase1-TG. Hepatic microvesicular steatosis is induced by disruption of uridine homeostasis through transgenic overexpression of UPase1, an
Daniel Ken Inaoka et al.
Biochemistry, 47(41), 10881-10891 (2008-09-24)
Dihydroorotate dehydrogenase (DHOD) from Trypanosoma cruzi (TcDHOD) is a member of family 1A DHOD that catalyzes the oxidation of dihydroorotate to orotate (first half-reaction) and then the reduction of fumarate to succinate (second half-reaction) in the de novo pyrimidine biosynthesis
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