Benzylisoquinoline alkaloid biosynthesis in opium poppy
نویسندگان
چکیده
منابع مشابه
Tyrosine aminotransferase contributes to benzylisoquinoline alkaloid biosynthesis in opium poppy.
Tyrosine aminotransferase (TyrAT) catalyzes the transamination of L-Tyr and α-ketoglutarate, yielding 4-hydroxyphenylpyruvic acid and L-glutamate. The decarboxylation product of 4-hydroxyphenylpyruvic acid, 4-hydroxyphenylacetaldehyde, is a precursor to a large and diverse group of natural products known collectively as benzylisoquinoline alkaloids (BIAs). We have isolated and characterized a T...
متن کاملSystematic silencing of benzylisoquinoline alkaloid biosynthetic genes reveals the major route to papaverine in opium poppy.
Papaverine, a major benzylisoquinoline alkaloid in opium poppy (Papaver somniferum), is used as a vasodilator and antispasmodic. Conversion of the initial intermediate (S)-norcoclaurine to papaverine involves 3'-hydroxylation, four O-methylations and dehydrogenation. However, our understanding of papaverine biosynthesis remains controversial more than a century after an initial scheme was propo...
متن کاملA tale of three cell types: alkaloid biosynthesis is localized to sieve elements in opium poppy.
Opium poppy produces a diverse array of pharmaceutical alkaloids, including the narcotic analgesics morphine and codeine. The benzylisoquinoline alkaloids of opium poppy accumulate in the cytoplasm, or latex, of specialized laticifers that accompany vascular tissues throughout the plant. However, immunofluorescence labeling using affinity-purified antibodies showed that three key enzymes, (S)-N...
متن کاملStudying Morphine Biosynthesis Using Transgenic Opium Poppy (Papaver somniferum L.)
Opium poppy (Papaver somniferum L.) produces a large variety of isoquinoline alkaloids. The aim of this investigation is to understand the regulation of biosynthesis and the ecological function of the alkaloids in the plant. Agrobacterium-mediated transformations of opium poppy were used to introduce the berberine bridge enzyme cDNA bbe 1 in the antisense orientation into seedling explants. Aft...
متن کاملMolecular cloning and characterization of tetrahydroprotoberberine cis-N-methyltransferase, an enzyme involved in alkaloid biosynthesis in opium poppy.
S-Adenosyl-l-methionine:tetrahydroprotoberberine cis-N-methyltransferase (EC 2.1.1.122) catalyzes the conversion of (S)-stylopine to the quaternary ammonium alkaloid, (S)-cis-N-methylstylopine, as a key step in the biosynthesis of protopine and benzophenanthridine alkaloids in plants. A full-length cDNA encoding a protein exhibiting 45 and 48% amino acid identity with coclaurine N-methyltransfe...
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ژورنال
عنوان ژورنال: Planta
سال: 2014
ISSN: 0032-0935,1432-2048
DOI: 10.1007/s00425-014-2056-8