Publications by Lin Xue | EPFL Graph Search

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A general strategy to develop cell permeable and fluorogenic probes for multicolour nanoscopy

Kai Johnsson, Lu Wang, Lin Xue

It is difficult to develop suitable fluorescent probes for live-cell nanoscopy, but a general strategy is now reported that can transform regular fluorophores into fluorogenic probes with excellent cell permeability and low unspecific background signals. U ...

NATURE PUBLISHING GROUP2020

A biosensor for measuring NAD(+) levels at the point of care

Johan Auwerx, Kai Johnsson, Luc Patiny, Elena Katsyuba, Qiuliyang Yu, Lin Xue

The cellular level of nicotinamide adenine dinucleotide (NAD(+)), through its different functions, affects cellular metabolism and signalling(1-3). A decrease in the NAD(+) content has been associated with various pathologies and physiological aging(4,5), ...

NATURE PUBLISHING GROUP2019

Semisynthetic sensor proteins enable metabolic assays at the point of care

Kai Johnsson, Rudolf Griss, Qiuliyang Yu, Lin Xue, Julien Hiblot

Monitoring metabolites at the point of care could improve the diagnosis and management of numerous diseases. Yet for most metabolites, such assays are not available. We introduce semisynthetic, light-emitting sensor proteins for use in paper-based metaboli ...

AMER ASSOC ADVANCEMENT SCIENCE2018

Bioluminescent Antibodies for Point-of-Care Diagnostics

Kai Johnsson, Rudolf Griss, Alberto Schena, Qiuliyang Yu, Lin Xue

We introduce a general method to transform antibodies into ratiometric, bioluminescent sensor proteins for the no-wash quantification of analytes. Our approach is based on the genetic fusion of antibody fragments to NanoLuc luciferase and SNAP-tag, the lat ...

2017

A General Strategy for the Semisynthesis of Ratiometric Fluorescent Sensor Proteins with Increased Dynamic Range

Kai Johnsson, Lin Xue, Efthymia Prifti

We demonstrate how a combination of self-labeling protein tags and unnatural amino acid technology permits the semisynthesis of ratiometric fluorescent sensor proteins with unprecedented dynamic range in vitro and on live cells. To generate such a sensor, ...

American Chemical Society2016

Imaging and manipulating proteins in live cells through covalent labeling

Kai Johnsson, Lin Xue, Julien Hiblot, Iuliia Karpenko

The past 20 years have witnessed the advent of numerous technologies to specifically and covalently label proteins in cellulo and in vivo with synthetic probes. These technologies range from self-labeling proteins tags to non-natural amino acids, and the q ...

Nature Publishing Group2015