CARDILLO Alejandra Beatriz
Analysis and sequencing of h6hmRNA, last enzyme in the tropane alkaloids pathway from anthers and hairy root cultures of Brugmansia candida (Solanaceae)
CARDILLO, ALEJANDRA BEATRIZ; GIULIETTI, ANA MARIA; MARCONI, PATRICIA
ELECTRONIC JOURNAL OF BIOTECHNOLOGY
Pontificia Universidad Catolica de Valparaiso
Lugar: Valparaiso, Chile; Año: 2006 vol. 9 p. 195 - 195
Brugmansia candida (Solanaceae) is a native tree distributed across South-American and produces the pharmacologically- important group of tropane alkaloids including scopolamine. This biocompound is synthesised from hyoscyamine by action of Hyoscyamine 6-b hydroxylase (H6H, EC 220.127.116.11) at the end of the tropane alkaloid pathway. Here are reported the tissue and organ-specific expression of h6hmRNA by RT-PCR analyses and the isolation, cloning and sequencing of the cDNA obtained from B. candida anthers and hairy root transformed cultures. Bioinformatic analysis of the nucleotide sequence revealed an uninterrupted ORF of 1038 bp and the predicted aminoacid sequence could be 344 aminoacid long. A database search showed that this sequence has high homology (97% identity) to Hyoscyamus niger H6H protein (Genbank accession number AAA33387.1).