Title : Endogenous morphine synthetic pathway preceded and gave rise to catecholamine synthesis in evolution (Review).

Pub. Date : 2007 Dec

PMID : 17982691






1 Functional Relationships(s)
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1 Given the striking similarities between the enzymatic steps in the morphine biosynthetic pathway and those driving the evolutionary adaptation of catecholamine chemical species to accommodate an expansion of interactive but distinct signaling systems, we surmise that the evolutionary emergence of catecholamine systems required conservation and selective "retrofit" of specific enzyme activities, i.e. catechol O-methyl transferase and phenylethanol-amine N-methyl transferase, drawn from cellular morphine expression. Morphine catechol-O-methyltransferase Homo sapiens