Activating Compound | Comment | Organism | Structure |
---|---|---|---|
additional information | in the adult prostate, ornithine decarboxylase activity is androgen-dependent | Mus musculus |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
DL-alpha-difluoromethylornithine | DFMO, an irreversible suicide inhibitor | Mus musculus |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
L-ornithine | Mus musculus | - |
putrescine + CO2 | - |
? | |
L-ornithine | Mus musculus C57/BL6 | - |
putrescine + CO2 | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Mus musculus | - |
- |
- |
Mus musculus C57/BL6 | - |
- |
- |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
embryo | ornithine decarboxylase protein is expressed in the urogenital sinus (UGS) epithelium of the male and female embryo prior to prostate development, and expression continues in prostatic epithelial buds as they emerge from the UGS | Mus musculus | - |
epithelium | - |
Mus musculus | - |
additional information | ornithine decarboxylase co-localizes with vimentin in the developing urogenital sinus. Immunohistochemic localization analysis, overview | Mus musculus | - |
prostate gland | ornithine decarboxylase protein is expressed in the epithelium of the ventral, dorsolateral and anterior lobes of the adult mouse prostate | Mus musculus | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
L-ornithine | - |
Mus musculus | putrescine + CO2 | - |
? | |
L-ornithine | - |
Mus musculus C57/BL6 | putrescine + CO2 | - |
? |
Synonyms | Comment | Organism |
---|---|---|
ODC | - |
Mus musculus |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
pyridoxal 5'-phosphate | - |
Mus musculus |
Organism | Comment | Expression |
---|---|---|
Mus musculus | ornithine decarboxylase mRNA decreases in the prostate upon castration | down |
Mus musculus | ornithine decarboxylase mRNA increases in the prostate upon administration of androgens | up |
General Information | Comment | Organism |
---|---|---|
malfunction | inhibiting ornithine decarboxylase using DL-alpha-difluromethylornithine in urogenital sinus (UGS) organ culture blocks the induction of prostatic buds by androgens, and significantly decreases expression of key prostate transcription factor, Nkx3.1, by androgens. DL-alpha-Difluromethylornithine also significantly decreases the expression of developmental regulatory gene Notch1. Other genes implicated in prostatic development, including Sox9, Wif1 and Srd5a2, are unaffected by the inhibitor. Inhibiting ornithine decarboxylase using pharmacologic agents such as alpha-difluromethylornithine or ablating Odc1 using a genetic approach renders pregnant mice unable to carry pups to term | Mus musculus |
metabolism | ornithine decarboxylase catalyzes the first and rate-limiting step in polyamine synthesis | Mus musculus |
physiological function | the first and rate-limiting step in polyamine synthesis is catalyzed by the enzyme ornithine decarboxylase which is encoded by the gene Odc1. Ornithine decarboxylase catalyzes the conversion of L-ornithine to putrescine. Ornithine decarboxylase activity is required for prostatic budding in the developing mouse prostate. Odc1 and polyamines are required for androgens to exert their effect in mediating prostatic bud induction, and are required for the expression of a subset of prostatic developmental regulatory genes including Notch1 and Nkx3.1. Testosterone administered to castrated male mice restores prostate secretory activity, whereas administering testosterone and the ornithine decarboxylase inhibitor DL-alpha-difluromethylornithine (DFMO) to castrated males does not restore prostate secretory activity, suggesting that polyamines are required for androgens to exert their effects | Mus musculus |