L
Luzia Guyer
Researcher at University of Zurich
Publications - 8
Citations - 213
Luzia Guyer is an academic researcher from University of Zurich. The author has contributed to research in topics: Phytol & Chlorophyll. The author has an hindex of 5, co-authored 8 publications receiving 159 citations. Previous affiliations of Luzia Guyer include University of São Paulo.
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Journal ArticleDOI
Different mechanisms are responsible for chlorophyll dephytylation during fruit ripening and leaf senescence in tomato
Luzia Guyer,Silvia Schelbert Hofstetter,Bastien Christ,Bruno Silvestre Lira,Magdalena Rossi,Stefan Hörtensteiner +5 more
TL;DR: It is concluded that PPH is the core phytol-hydrolytic enzyme during leaf senescence in different plant species; however, fruit ripening involves other hydrolases, which are active in parallel to PPH or are the core hydrolase in fruits.
Journal ArticleDOI
Down-regulation of tomato PHYTOL KINASE strongly impairs tocopherol biosynthesis and affects prenyllipid metabolism in an organ-specific manner
Juliana Almeida,Mariana da Silva Azevedo,Livia Spicher,Gaétan Glauser,Katharina vom Dorp,Luzia Guyer,Andrea del Valle Carranza,Ramón Asis,Amanda P. De Souza,Marcos Silveira Buckeridge,Diego Demarco,Cécile Bres,Christophe Rothan,Lázaro Eustáquio Pereira Peres,Stefan Hörtensteiner,Felix Kessler,Peter Dörmann,Fernando Carrari,Magdalena Rossi +18 more
TL;DR: Phytol kinase plays a key role in the regulation of isoprenoid metabolism in an organ-specific manner and is involved in the selection and biosynthesis of polypeptide A in plants.
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Non-specific activities of the major herbicide-resistance gene BAR.
Bastien Christ,Ramon Hochstrasser,Luzia Guyer,Rita Francisco,Sylvain Aubry,Stefan Hörtensteiner,Jing-Ke Weng +6 more
TL;DR: The first crystal structure of the BAR enzyme is reported and structure-guided engineering strategies to reduce the non-specific activities of BAR are demonstrated to demonstrate the design of maximally insulated systems featuring heterologously expressed enzymes.
Journal ArticleDOI
Pheophytinase Knockdown Impacts Carbon Metabolism and Nutraceutical Content Under Normal Growth Conditions in Tomato
Bruno Silvestre Lira,Daniele Rosado,Juliana Almeida,Amanda P. De Souza,Marcos Silveira Buckeridge,Eduardo Purgatto,Luzia Guyer,Stefan Hörtensteiner,Luciano Freschi,Magdalena Rossi +9 more
TL;DR: In tomato, PPH plays a role beyond senescence-associated Chl degradation that, when compromised, affects isoprenoid and carbon metabolism which ultimately alters the fruit's nutraceutical content.
Journal ArticleDOI
Catalytic and structural properties of pheophytinase, the phytol esterase involved in chlorophyll breakdown.
TL;DR: Pheophytinase comprises a catalytic-triad of residues and shows limited but physiologically relevant substrate specificity towards magnesium-free chlorophyll derivatives due to its lid domain.