Topic
Terpene
About: Terpene is a research topic. Over the lifetime, 2208 publications have been published within this topic receiving 51480 citations. The topic is also known as: terpenes.
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TL;DR: In this article, the double bond of the resulting α,β-unsaturated terpene alcohols was further hydrogenated to form the corresponding saturated TERPENE alcohols, and a small amount of terpenic acids was also formed.
31 citations
TL;DR: It is proposed that in roses the monoterpene biosynthesis effort is focused on the production of acyclic monoterpenes derived from geraniol through the recently characterized Nudix biosynthesis pathway, at the expense of conventional monotercine biosynthesis via terpene synthases such as linalools or linalool nerolidol synthases.
31 citations
TL;DR: This study indicates that the formation of terpene carbon skeletons in red algae is carried out by MTPSLs that are phylogenetically unrelated to typical plant terPene synthases and most likely originated in Rhodophyta via horizontal gene transfer from bacteria.
Abstract: Red algae (Rhodophyta) and land plants belong to the monophyletic clade Archaeplastida, and taxa of both groups are rich producers of terpene secondary metabolites. The terpene carbon skeletons of land plants are made by two types of terpene synthases: typical plant terpene synthases and microbial-type terpene synthases (MTPSLs); however, terpene biosynthesis in red algae is poorly understood. By systematic sequence analysis of seven genomes and 34 transcriptomes of red algae, MTPSL homologs were identified within one genome and two transcriptomes, whereas no homolog of typical plant terpene synthase genes was found. Phylogenetic analysis showed that red algae MTPSLs group with bacterial terpene synthases. Analysis of the genome assembly and characterization of neighboring genes demonstrated red algal MTPSLs to be bona fide red algal genes and not microbial contaminants. MTPSL genes from Porphyridium purpureum and Erythrolobus australicus were characterized via heterologous expression in Escherichia coli and demonstrated to have sesquiterpene synthase activities. We detected a number of volatile sesquiterpenes in the headspace of P. purpureum and E. australicus cultures, most identical to the in vitro products of the respective MTPSLs. Expression of the MTPSL gene in P. purpureum was found to be induced by methyl jasmonate, suggesting a role for this gene in host defense. In summary, this study indicates that the formation of terpene carbon skeletons in red algae is carried out by MTPSLs that are phylogenetically unrelated to typical plant terpene synthases and most likely originated in Rhodophyta via horizontal gene transfer from bacteria.
31 citations
TL;DR: The amphiphilic renewable grafted polymers were tested as emulsifiers for the stabilization of liquid miniemulsion of terpene droplets dispersed in an aqueous phase.
31 citations
TL;DR: Results indicate that the alternate substrates are ionized by the cyclases prior to their achieving the optimum orientation for bicyclization.
31 citations