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PrediKSion: An evolutionary guided and experimentally validated computational pipeline to unravel new polyketide synthase functionality

Projektbeschreibung

Nachhaltiger Weg zu neuartigen Antibiotika

Polyketide sind eine große Gruppe von Sekundärmetaboliten aus Bakterien, Pilzen und Pflanzen, die interessante und wertvolle Aktivitäten aufweisen. Sie sind als Antibiotika, Antimykotika und Arzneimittel im Einsatz und können chemisch synthetisiert oder aus biologischen Quellen erzeugt werden. Das EU-finanzierte Projekt PrediKSion schlägt vor, Acyltransferase-Polyketidsynthase-Enzyme aus Bakterien als einen nachhaltigen Weg zur Erzeugung von Polyketiden zu nutzen. Zur Entdeckung neuer biosynthetischer Merkmale der Acyltransferase-Polyketidsynthasen werden die Forschenden eine rechnergestützte Pipeline entwickeln, um die Funktionalität von noch nicht charakterisierten Enzymen zu bewerten. Langfristig werden auf diese Weise neuartige pharmazeutische Bausteine entdeckt werden.

Ziel

Many of the most valuable, yet complex chemicals in society are obtained from bacteria, who use giant, multimodular acyltransferase polyketide synthase (AT PKS) enzyme complexes to make these products. The modular nature of these enzymes holds the promise to engineer biosynthetic assembly lines to produce new, societally relevant products in a benign and sustainable manner. However, the chemical functionalities installed by the textbook cis-AT PKSs is mostly limited to several basic moieties.

In contrast, in a second class of PKSs, trans-AT PKSs, over 150 different module types have been identified, yet with many more still uncharacterized. Initial results show that bioinformatically-guided approaches can be effective ways to assign the functionality of these uncharacterized modules, but only individual examples have been studied. To catalyze the discovery of new functionality in trans-AT PKSs, I propose PrediKSion: a comprehensive, evolution-guided and experimentally validated computational pipeline to unravel the hidden chemical functionality of unassigned trans-AT PKS modules.

PrediKSion will facilitate unbiased discovery of new module functionalities by looking at the phylogeny of ketosynthases (KSs) in the PKS sequences. The high substrate selectivity in KSs reveals crucial information on chemistry installed by upstream modules and can thereby lead to the discovery of new and unexpected biosynthetic features in uncharacterized PKS modules and elusive trans-acting components. PrediKSion will be applied on the complete bacterial tree of life and achieve great impact by providing the community with a global mapping of predicted chemical functionality in trans-AT PKSs. The computational suggestions will finally be validated experimentally and the substrate scope of new PKS modules will be studied. In this way, PrediKSion will accelerate the mapping of uncharacterized PKSs and the discovery of new metabolites and potentially interesting pharmaceutical platforms.

Koordinator

EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH
Netto-EU-Beitrag
€ 191 149,44
Adresse
Raemistrasse 101
8092 Zuerich
Schweiz

Auf der Karte ansehen

Region
Schweiz/Suisse/Svizzera Zürich Zürich
Aktivitätstyp
Higher or Secondary Education Establishments
Links
Gesamtkosten
€ 191 149,44