Results 71 to 80 of about 33,743 (304)

Two Amino Acid Residues Contribute to a Cation-π Binding Interaction in the Binding Site of an Insect GABA Receptor [PDF]

, 2011
Cys-loop receptor binding sites characteristically possess an "aromatic box," where several aromatic amino acid residues surround the bound ligand. A cation-π interaction between one of these residues and the natural agonist is common, although the ...
Ashby, Jamie A., Dougherty, Dennis A., Lummis, Sarah C. R., McGonigle, Ian   +3 more
core  

Enzymatic aminoacylation of tRNA with unnatural amino acids [PDF]

Proceedings of the National Academy of Sciences, 2006
The biochemical flexibility of the cellular translation apparatus offers, in principle, a simple route to the synthesis of drug-like modified peptides and novel biopolymers. However, only ≈75 unnatural building blocks are known to be fully compatible with enzymatic tRNA acylation and subsequent ribosomal synthesis of modified peptides ...
Matthew C T, Hartman, Kristopher, Josephson, Jack W, Szostak   +2 more
openaire   +2 more sources

dUTPase is essential in zebrafish development and possesses several single‐nucleotide variants with pronounced structural and functional consequences

FEBS Open Bio, EarlyView.
dUTPases are involved in balancing the appropriate nucleotide pools. We showed that dUTPase is essential for normal development in zebrafish. The different zebrafish genomes contain several single‐nucleotide variations (SNPs) of the dut gene. One of the dUTPase variants displayed drastically lower protein stability and catalytic efficiency as compared ...
Viktória Perey‐Simon, Angéla Békesi, Latifa Kazzazy, Jázmin Mihály, Máté Varga, Beáta G. Vértessy, Kinga Nyíri   +6 more
wiley   +1 more source

Imaging Active Infection in vivo Using D-Amino Acid Derived PET Radiotracers. [PDF]

, 2017
Occult bacterial infections represent a worldwide health problem. Differentiating active bacterial infection from sterile inflammation can be difficult using current imaging tools. Present clinically viable methodologies either detect morphologic changes
Blecha, Joseph E, Flavell, Robert R, Kwak, Tiffany, Mutch, Christopher A, Neumann, Kiel D, Ohliger, Michael A, Rosenberg, Oren S, Sriram, Renuka, VanBrocklin, Henry F, Villanueva-Meyer, Javier E, Wilson, David M   +10 more
core   +1 more source

Screening and epitope characterization of Nidogen‐2‐specific nanobodies

FEBS Open Bio, EarlyView.
Camel immunization and phage display were employed to generate high‐affinity VHH nanobodies against Nidogen‐2. After library construction, biopanning, ELISA screening, sequencing, and recombinant expression, selected nanobodies were purified and characterized, leading to the preliminary exploration of a nanobody‐based sandwich ELISA for specific ...
Jianchuan Wen, Qianqian Cui, Zhongyun Lan, Yingjun Wang, Shuaiying Zhao, Wenxuan Feng, Yunfeng Liu, Qiting Huang, Dongna Zhang, Jianfeng Xu   +9 more
wiley   +1 more source

Visible-light-mediated catalyst-free synthesis of unnatural α-amino acids and peptide macrocycles

Nature Communications, 2021
To address the shortcomings in the application of bioactive peptides as drugs, incorporation of unnatural amino acids (UAAs) has been used. Here, the authors report an ionic compound-promoted C-N cleavage of alkyl pyridinium to generate alkyl radicals ...
Mengran Wang, Chao Wang, Yumei Huo, Xiaobo Dang, Hongxiang Xue, Liangyu Liu, Hongli Chai, Xiuling Xie, Zhixuan Li, Doudou Lu, Zhaoqing Xu   +10 more
doaj   +1 more source

Decreased cold‐sensing function of the transient receptor potential channel TRPM8 from tailed amphibians

FEBS Open Bio, EarlyView.
Despite frogs avoiding low temperatures, examination of four salamander species revealed that none avoided cold and all possessed cold tolerance. Functional analysis of TRPM8, a cold sensor, showed that all salamander TRPM8s had lost their cold sensitivity.
Tadahiro Sawao, Daiki Kobayashi, Shogo Hori, Osamu Saitoh   +3 more
wiley   +1 more source

Diastereoselective Ugi reaction for the synthesis of unnatural amino esters

Orbital: The Electronic Journal of Chemistry, 2012
Multicomponent Reactions (MCR) are useful reactions to obtain complex products by the simple mixture of 3 or more reactants. The classic Ugi reaction (4-UCR) involves a mixture of an amine, aldehyde, isocyanide and a carboxylic acid, giving peptoides as ...
Rafael Oliveira Rocha, Milenna Milhomem Sena, Gecimar Oliveira Gomes, Carlos Kleber Z. Andrade, Márcio Weber Paixão   +4 more
doaj   +1 more source

A Cation-π Interaction Discriminates among Sodium Channels That Are Either Sensitive or Resistant to Tetrodotoxin Block [PDF]

, 2007
Voltage-gated sodium channels control the upstroke of the action potential in excitable cells of nerve and muscle tissue, making them ideal targets for exogenous toxins that aim to squelch electrical excitability.
Ahern, Christopher A., Dougherty, Dennis A., Eastwood, Amy L., Horn, Richard, Santarelli, Vincent P.   +4 more
core   +2 more sources

Protein conjugation with genetically encoded unnatural amino acids [PDF]

Current Opinion in Chemical Biology, 2013
The site-specific incorporation of unnatural amino acids with orthogonal chemical reactivity into proteins enables the synthesis of structurally defined protein conjugates. Amino acids containing ketone, azide, alkyne, alkene, and tetrazine side chains can be genetically encoded in response to nonsense and frameshift codons.
Chan Hyuk, Kim, Jun Y, Axup, Peter G, Schultz   +2 more
openaire   +2 more sources