Publications associées à Arginine

Salt Bridge Structure of Microhydrated Arginine Kinetically Trapped in the Gas Phase by Evaporative Cooling

Aminoacids and peptides generally exhibit zwitterionic forms withsalt bridge (SB) structures in solution but charge-solvated (CS) motifsin the gas phase. Here, we report a study of non-covalent complexesof the protonated amino acid arginine, ArgH(+)(H2O)( ...

2023

Dynamic partitioning of branched-chain amino acids-derived nitrogen supports renal cancer progression

Vassily Hatzimanikatis, Maria Masid Barcon, Ming Yang

Metabolic reprogramming is critical for tumor initiation and progression. However, the exact impact of specific metabolic changes on cancer progression is poorly understood. Here, we integrate multimodal analyses of primary and metastatic clonally-related ...

Nature Portfolio2022

A releasable disulfide-linked peptide tag facilitates the synthesis and purification of short peptides

Christian Heinis, Alessandro Zorzi, Yu Teng Wu, Jack Peter Christopher Williams

Combinatorial cyclization of hundreds to thousands of random linear peptides by structurally diverse chemical linkers offers access to large macrocyclic compound libraries. A bottleneck in the development of such libraries is the preparation of large numbe ...

Royal Society of Chemistry2020

Structural mechanism of cGAS inhibition by the nucleosome

Rudolf Hovius, Beat Fierz, Andrea Ablasser, Baptiste Claude André Guey, Alexiane Clara Decout, Pauline Ambre Melenec, Simone Cavadini, Kristina Makasheva, Sélène-Véronique Glück

The DNA sensor cGAS initiates innate immune responses following microbial infection, cellular stress, and cancer1. Upon activation by double-stranded DNA, cytosolic cGAS produces 2’3’ cyclic GMP-AMP and triggers inflammatory cytokine and type I interferon ...

2020

Alterations of Brain Energy Metabolism in Type 2 Diabetic Goto-Kakizaki Rats Measured In Vivo by (13)C Magnetic Resonance Spectroscopy

Rolf Gruetter, João Miguel das Neves Duarte, Sarah Catherine Sonnay, Freya-Merret Girault

Type 2 diabetes (T2D) is associated with deterioration of brain structure and function. Here, we tested the hypothesis that T2D induces a reorganization of the brain metabolic networks that support brain function. For that, alterations of neuronal and glia ...

2019

Calcium phosphate formation on titanium-based surfaces: bioactivity evaluated by in vitro methods

Weitian Zhao

The prediction of implant behaviors in vivo by the use of easy-to-perform in vitro methods is of great interest in biomaterials research. In the field of bone implants, it is commonly accepted that a spontaneous formation of a hydroxyapatite (HA) layer on ...

EPFL2018

Social isolation stress and chronic glutathione deficiency have a common effect on the glutamine-to-glutamate ratio and myo-inositol concentration in the mouse frontal cortex

Rolf Gruetter, Alberto Corcoba, Kim Do, João Miguel das Neves Duarte

Environmental stress can interact with genetic predisposition to increase the risk of developing psychopathology. In this work, we tested the hypothesis that social isolation stress interacts with impaired glutathione synthesis and have cumulative effects ...

Wiley-Blackwell2017

Novel inhibitors of the enzyme activated factor xii (fxiia)

Christian Heinis, Jonas Alfred Karl Wilbs, Vanessa Baeriswyl, Simon Jan Middendorp

The present invention relates to a bicyclic inhibitor of the coagulation enzyme activated factor XII (FXIIa) comprising or consisting of the peptide (X1)(X2)(X3)n(X4)(X5)(X6)m(X7)(X9)l(X10)(X11)(X12)(X13)(X14)k(X15)(X16), wherein (X1) is present or absent ...

2016

Mercury tissue residue approach in Chironomus riparius: Involvement of toxicokinetics and comparison of subcellular fractionation methods

Along with the growing body of evidence that total internal concentration is not a good indicator of toxicity, the Critical Body Residue (CBR) approach recently evolved into the Tissue Residue Approach (TRA) which considers the biologically active portion ...

Elsevier Science Bv2016

Cell Compatible Arginine Containing Cationic Polymer: One-Pot Synthesis and Preliminary Biological Assessment

Lucia Baldi Unser, Jutta Christine Wandrey, Xiao Shen, Nino Zavradashvili, Tamar Memanishvili

Synthetic cationic polymers are of interest as both nonviral vectors for intracellular gene delivery and antimicrobial agents. For both applications synthetic polymers containing guanidine groups are of special interest since such kind of organic compounds ...

Springer India2014

Optimized MEGA-SPECIAL for in vivo glutamine detection in the rat brain at 14.1 T

Rolf Gruetter, Cristina Ramona Cudalbu, Mélanie Craveiro

Glutamine has multiple roles in brain metabolism and its concentration can be altered in various pathological conditions. An accurate knowledge of its concentration is therefore highly desirable to monitor and study several brain disorders in vivo. However ...

Wiley-Blackwell2014

Arginine-Based Biodegradable Ether–Ester Polymers with Low Cytotoxicity as Potential Gene Carriers

Lucia Baldi Unser, Jutta Christine Wandrey, Sagar Shashidhar Manoli, Nino Zavradashvili, Tamar Memanishvili

The success of gene therapy depends on safe and effective gene carriers. Despite being widely used, synthetic vectors based on poly(ethylenimine) (PEI), poly(l-lysine) (PLL), or poly(l-arginine) (poly-Arg) are not yet fully satisfactory. Thus, both improve ...

American Chemical Society2014

Photodynamics of Lys+-Trp Protein Motifs: Hydrogen Bonds Ensure Photostability

Ursula Röthlisberger, Ivano Tavernelli, Matteo Guglielmi, Manuel Dömer

Cation-pi interactions such as Lys(+)-Trp, are highly abundant structural motifs in proteins. Both, experimental and theoretical studies of small prototypical gas phase systems, H(+)Trp, H(+)Trp center dot(H2O)(n) and H+ Gly-Trp, indicate such an arrangeme ...

Royal Soc Chemistry2013

Randomized codon mutagenesis reveals that the HIV Rev arginine-rich motif is robust to substitutions and that double substitution of two critical residues alters specificity

Maroun Bou Sleiman

The binding of the arginine-rich motif (ARM) of HIV Rev protein to its high-affinity site in stem IIB in the Rev response element (RRE) initiates assembly of a ribonucleoprotein complex that mediates the export of essential, incompletely spliced viral tran ...

Wiley-Blackwell2013

Glutamatergic and GABAergic energy metabolism measured in the rat brain by 13C NMR spectroscopy at 14.1 T

Rolf Gruetter, João Miguel das Neves Duarte

Energy metabolism supports both inhibitory and excitatory neurotransmission processes. This study investigated the specific contribution of astrocytic metabolism to γ-aminobutyric acid (GABA) synthesis and inhibitory GABAergic neurotransmission that remain ...

Wiley-Blackwell2013

Reduced glutamine concentration improves protein production in growth-arrested CHO-DG44 and HEK-293E cells

Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Yashas Rajendra, Divor Kiseljak

For most cultivated mammalian cells, glutamine is an essential medium component. However, glutamine consumption results in the production of ammonia, a cytotoxic byproduct. Here we investigated the effect of glutamine reduction on recombinant protein produ ...

Springer Netherlands2011

Visualization of proprotein convertase activity in living cells and tissues

Daniel Constam

The invention relates to a system for detecting the presence of a convertase cleaving activity, the system comprising a molecule comprising a proteolytic cleavage site with the amino acid sequence -R-X1-X2-R-, wherein R represents the amino acid arginine, ...

2011

Arginine-Specific Modification of Proteins with Polyethylene Glycol

Harm-Anton Klok, Marc Gauthier

In this study, the residue-selective modification of proteins with polymers at arginine residues is reported. The difficulty in modifying arginine residues lies in the fact that they are less reactive than lysine residues. Consequently, typical chemo-selec ...

American Chemical Society2011

Arginine-specific protein modification using alpha-oxo-aldehyde functional polymers prepared by atom transfer radical polymerization

Harm-Anton Klok, Maxime Ayer, Frederik Roman Wurm, Marc Gauthier, Justyna Kowal

The residue-specific modification of peptides and proteins is a powerful strategy for preparing biomolecular-synthetic polymer conjugates with advanced properties. This manuscript aims at expanding the present toolbox of residue-selective protein modificat ...

2011

Tailoring hydrogel degradation and drug release via neighboring amino acid-controlled ester hydrolysis

Matthias Lütolf, Jeffrey Alan Hubbell, Yun Suk Jo, Jay Gantz

We present a versatile scheme to rationally modulate the hydrolysis rate of ester bonds in hydrophilic polymer networks via adjacent charged amino acids. As soluble model systems, two cysteine-bearing oligopeptides containing either positively charged argi ...

2009