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MoleculeMETABOLITE RECORD

Ornithine

A non-protein amino acid regenerated at the end of each urea-cycle turn.

5-carbon moleculeUrea cycleHomo sapiens
REFERENCE IDENTIFIERCHEBI:18257ChEBI record
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Learn about Ornithine

Ornithine is a small molecule that cells make, use, or change in connected metabolic reactions.

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Record type: molecule. A non-protein amino acid regenerated at the end of each urea-cycle turn.
QUICK FACTS

At a glance

Carbon backbone 5 CThis carbon count is shown where it is defined for the molecule.

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Connected records

3 links
Used and produced inUrea cycleHandled byOrnithine transcarbamylaseHandled byArginase 1
STRUCTURED REACTIONS

Where it appears

Open metabolism map
2

Citrulline formation

Ornithine transcarbamylase transfers the carbamoyl group to ornithine.

Urea cycle · irreversible
5

Urea release

Arginase hydrolyzes arginine, releasing urea and regenerating ornithine.

Urea cycle · irreversible