Publications de Karl Gademann | EPFL Graph Search

Genetically encoded betaxanthin-based small-molecular fluorescent reporter for mammalian cells

Leo Scheller, Karl Gademann, Simon Sieber

We designed and engineered a dye production cassette encoding a heterologous pathway, including human tyrosine hydroxylase and Amanita muscaria 4,5-DOPA dioxygenase, for the biosynthesis of the betaxanthin family of plant and fungal pigments in mammalian c ...

2020

Chemistry Europe Fellows Katharina M. Fromm and Karl Gademann

Karl Gademann

SWISS CHEMICAL SOC2020

Allelopathic Activity of the Iron Chelator Anachelin-A Molecular Hybrid with a Dual Mode of Action

Karl Gademann

One of the compounds suggested to be responsible for the cyanobacterial dominance over competing green algae is identified. Evidence is provided on the molecular, chemical level that the iron chelator anachelin from the cyanobacterium Anabaena cylindrica p ...

Wiley-V C H Verlag Gmbh2016

Functionally Optimized Neuritogenic Farinosone C Analogs: SAR-Study and Investigations on Their Mode of Action

Karl Gademann, Patrick Burch, Andrea Chicca

Several natural products derived from entomopathogenic fungi have been shown to initiate neuronal differentiation in the rat pheochromocytoma PC12 cell line. After the successful completion of the total synthesis program, the reduction of structural comple ...

Amer Chemical Soc2014

Balgacyclamides, Antiplasmodial Heterocyclic Peptides from Microcystis aeruguinosa EAWAG 251

Cyril Portmann, Karl Gademann, Emilie Baudat, Laeticia Da Silva, Simon Sieber

The isolation and structural characterization of three new heterocyclic and macrocyclic peptides, balgacyclamides A C, from Microcystis aeruginosa EAWAG 251 are reported. The constitutions were determined by 2D-NMR methods and mass spectrometry, and the co ...

Amer Chemical Soc2014

Telomerase Inhibitors from Cyanobacteria: Isolation and Synthesis of Sulfoquinovosyl Diacylglycerols from

Joachim Lingner, Gerardo Turcatti, Cyril Portmann, Damiano Banfi, Karl Gademann, Emilie Baudat, Laeticia Da Silva, Tom Woods

By using the Telospot assay, 27 different extracts of cyanobacteria were evaluated for telomerase inhibition. All extracts showed varying, but significant activity. We selected Microcystis aeruguinosa PCC 7806 to identify the active compound and a bioassay ...

Wiley-Blackwell2013

Bioinspired, releasable quorum sensing modulators

Adrien Keith Lawrence, Karl Gademann

We demonstrate the synthesis and immobilization of natural product hybrids featuring an acyl-homoserine lactone and a nitrodopamine onto biocompatible TiO2 surfaces through an operationally simple dip-and-rinse procedure. The resulting immobilized hybrids ...

Royal Society of Chemistry2013

Total Synthesis of Cyrneine A

Karl Gademann, Cindy Fellay

The tricyclic diterpene cyrneine A featuring a hexatrienal unit was prepared synthetically for the first time by a Heck reaction, a carbene ring expansion, and a reductive carbonylation. The structure of the natural product was assigned by X‐ray crystal an ...

Wiley-VCH Verlag GmbH2012

Antimalarial and antitubercular nostocarboline and eudistomin derivatives: synthesis, in vitro and in vivo biological evaluation

Stewart Cole, Rosario Scopelliti, Luc Patiny, Karl Gademann, Simone Bonazzi

The synthesis of nine nostocarboline derivatives with substitutions of the 2-methyl group by alkyl, aryl and functionalized residues, 10 symmetrical bis cationic dimers linking 6-Cl-norharmane through the 2-position and fifteen derivatives of the marine al ...

2010

Poly(ethylene glycol) Adlayers Immobilized to Metal Oxide Substrates Through Catechol Derivatives: Influence of Assembly Conditions on Formation and Stability

Karl Gademann

We have investigated Five different poly(ethylene glycol) (PEG, 5 kDa) catechol derivatives in terms of their spontaneous surface assembly from aqueous solution, adlayer stability, and resistance to nonspecific blood serum adsorption as a function of the t ...

2010