CrBPF1 overexpression alters transcript levels of terpenoid indole alkaloid biosynthetic and regulatory genes.

Terpenoid indole alkaloid (TIA) biosynthesis in Catharanthus roseus is a complex and highly regulated process. Understanding the biochemistry and regulation of the TIA pathway is of particular interest as it may allow the engineering of plants to accumulate higher levels of pharmaceutically important alkaloids. Toward this end, we generated a transgenic C.

The ORCA2 transcription factor plays a key role in regulation of the terpenoid indole alkaloid pathway.

Background: The terpenoid indole alkaloid (TIA) pathway leads to the production of pharmaceutically important drugs, such as the anticancer compounds vinblastine and vincristine. Unfortunately, these drugs are produced in trace amounts, causing them to be very costly. To increase production of these drugs, an improved understanding of the TIA regulatory pathway is needed.

Perspectives of the metabolic engineering of terpenoid indole alkaloids in Catharanthus roseus hairy roots.

This review looks back on how the terpenoid indole alkaloid pathway and the regulatory factors in Catharanthus roseus were identified and characterized, and how metabolic engineering, including genetic engineering and metabolic profiling, was conducted based on the gained knowledge. In addition, further examination of the terpenoid indole alkaloid pathway is proposed.

The expression of 1-deoxy-D-xylulose synthase and geraniol-10-hydroxylase or anthranilate synthase increases terpenoid indole alkaloid accumulation in Catharanthus roseus hairy roots.

The terpenoid indole alkaloid (TIA) pathway in Catharanthus roseus produces two important anticancer drugs, vinblastine and vincristine, in very low yields. This study focuses on overexpressing several key genes in the upper part of the TIA pathway in order to increase flux toward downstream metabolites within hairy root cultures. Specifically, we constructed hairy root lines with inducible overexpression of 1-deoxy-D-xylulose synthase (DXS) or geraniol-10-hydroxylase (G10H).

Five year maintenance of the inducible expression of anthranilate synthase in Catharanthus roseus hairy roots.

Transgenic hairy root cultures have the potential to be an industrial production platform for a variety of chemicals. This report demonstrates the long-term stability of a transgenic Catharanthus roseus hairy root line containing the inducible expression of a feedback-insensitive anthranilate synthase (AS). After 5 years in liquid culture, the presence of the inserted AS gene was confirmed by genomic PCR.