Dopaquinone transforms to Leucodopachrome (Cyclodopa)

Stable Identifier
R-HSA-5662669
Type
Reaction [transition]
Species
Homo sapiens
Compartment
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Dopaquinone is highly reactive and in the absence of sulfhydryl compounds it undergoes the intramolecular addition of the amino group to produce an intermediate, leucodopachrome (also termed cyclodopa). A redox exchange between cyclodopa and dopaquinone then gives rise to dopachrome, an orange-red intermediate (Raper 1927, Mason et al. 1948) and dopa. This latter reaction is considered the source of dopa formed during melanogenesis (Ito & Wakamatsu 2008).

Literature References
PubMed ID Title Journal Year
18920770 The chemistry of melanin. III. Mechanism of the oxidation of dihydroxyphenylalanine by tyrosinase

Mason, HS

J. Biol. Chem. 1948
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