Results 21 to 30 of about 33,743 (304)

NMR Studies of Large Protein Dynamics Using Unnatural Amino Acids

open access: yesChinese Journal of Magnetic Resonance, 2021
Nuclear magnetic resonance (NMR) is a major method used to study protein structure at atomic resolution. Besides presenting the high-resolution structure, NMR facilitates studies on protein dynamics near physiological conditions that are intimately ...
Chao-wei SHI, Pan SHI, Chang-lin TIAN
doaj   +1 more source

Metabolism of amino acid amides in Pseudomonas putida ATCC 12633 [PDF]

open access: yes, 1993
The metabolism of the natural amino acid L-valine, the unnatural amino acids D-valine, and D-, L-phenylglycine (D-, L-PG), and the unnatural amino acid amides D-, L-phenylglycine amide (D, L-PG-NH2) and L-valine amide (L-Val-NH2) was studied in ...
Croes, L.M.,   +4 more
core   +1 more source

Selective quantitative N-functionalization of unprotected α-amino acids using NHC-Ir(III) catalyst

open access: yesSTAR Protocols, 2023
Summary: Unnatural amino acids are valuable building blocks with numerous applications. Here, we present a quantitative technique for accessing mono-N-functionalized amino acids directly from unprotected substrates using alcohols as alkylating agents and
Beatriz Saavedra   +3 more
doaj   +1 more source

Genetically Encoded Photo-cross-linkers Map the Binding Site of an Allosteric Drug on a G Protein-Coupled Receptor [PDF]

open access: yes, 2012
G protein-coupled receptors (GPCRs) are dynamic membrane proteins that bind extracellular molecules to transduce signals. Although GPCRs represent the largest class of therapeutic targets, only a small percentage of their ligand-binding sites are ...
Abrol, Ravinder   +5 more
core   +1 more source

Bicyclic Pyrrolidine-Isoxazoline γ Amino Acid: A Constrained Scaffold for Stabilizing α-Turn Conformation in Isolated Peptides

open access: yesFrontiers in Chemistry, 2019
Unnatural amino acids have tremendously expanded the folding possibilities of peptides and peptide mimics. While α,α-disubstituted and β-amino acids are widely studied, γ-derivatives have been less exploited.
Francesco Oliva   +5 more
doaj   +1 more source

Evaluation and optimisation of unnatural amino acid incorporation and bioorthogonal bioconjugation for site-specific fluorescent labelling of proteins expressed in mammalian cells

open access: yesBiochemistry and Biophysics Reports, 2019
Many biophysical techniques that are available to study the structure, function and dynamics of cellular constituents require modification of the target molecules.
Leonhard Jakob   +2 more
doaj   +1 more source

Novel Crown Ether Amino Acids as Fluorescent Reporters for Metal Ions

open access: yesMolecules, 2023
Unnatural amino acids with enhanced properties, such as increased complexing ability and luminescence, are considered to be highly attractive building blocks for bioinspired frameworks, such as probes for biomolecule dynamics, sensitive fluorescent ...
Patrícia M. R. Batista   +3 more
doaj   +1 more source

Protecting‐Group‐Free Amidation of Amino Acids using Lewis Acid Catalysts [PDF]

open access: yes, 2018
Amidation of unprotected amino acids has been investigated using a variety of ‘classical“ coupling reagents, stoichiometric or catalytic group(IV) metal salts, and boron Lewis acids.
Badland, M   +5 more
core   +1 more source

Expanding the genetic code of Mus musculus

open access: yesNature Communications, 2017
Expanding the genetic code with unnatural amino acids in model organisms is a powerful tool for investigatingin vivocellular proteins and processes. Here the authors re-engineer the amber stop codon in laboratory mice to allow site-specific incorporation
Songmi Han   +5 more
doaj   +1 more source

Antimicrobial Activity of Amino Acid Analogues and Their Derivatives

open access: yesProceedings, 2017
Libraries of compounds containing unnatural amino acids or amino acid analogues were prepared from inexpensive substrates using sustainable processes [1–3]. [...]
Dácil Hernández   +4 more
doaj   +1 more source

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