Results 191 to 200 of about 184,219 (281)

The Role of Iron‐Hyponitrite Intermediates in Biology and Insights From Synthetic Model Complexes

Chemistry – A European Journal, EarlyView.
Despite the difference in active site architecture, NO reduction by different NOR enzymes is expected to be linked by a common intermediate: hyponitrite (N2O22−). However, experimentally, very little is known about the coordination chemistry of iron with hyponitrite and the expected Fe‐hyponitrite intermediates.
Michael O. Lengel, Nicolai Lehnert
wiley   +1 more source

Spotlight on the Nucleotide: Solid‐State NMR for the Investigation of ATP Hydrolysis in the ATPase SmsC

Chemistry – A European Journal, EarlyView.
Nucleotide‐detected solid‐state NMR has been applied to probe nucleotide conformations and dynamics during ATP hydrolysis using the dimeric P‐loop ATPase SmsC as a model protein. The different stages of ATP hydrolysis have been mimicked by ATP analogues for which different degrees of conformational heterogeneity have been observed. ABSTRACT Solid‐state
Nina Wehr, Laure Decamps, Julius Schlüter, Koen Linssen, Georg Künze, Kushal Sengupta, Serena DeBeer, Thomas Wiegand   +7 more
wiley   +1 more source

Transcription-Coupled Template Reconfiguration of 8-Oxoguanine for Error-Prone Transcription Revealed by Time-Resolved X-ray Crystallography and Molecular Dynamics. [PDF]

J Am Chem Soc
Oh J, Konovalov KA, Hou P, Chong J, Huang X, Wang D.   +5 more
europepmc   +1 more source

Synthesis and Optical Properties of Diboron Complexes of 1,4‐Anthraquinone Derivatives

Chemistry – A European Journal, EarlyView.
1,4‐Diboron complexes exhibit near‐infrared fluorescence, in contrast to non‐emissive 1,5‐diboron analogues. Fluorescence quantum yields decrease with increasing electron‐donating substituents, attributed to enhanced nonradiative decay via intramolecular PeT.
Yasuhiro Kubota, Ayumi Ogasawara, Ayato Hakamada, Naoya Suzuki, Masayasu Taki, Shota Mizuno, Toshiyasu Inuzuka, Kazumasa Funabiki, Chie Yamada‐Kubota, Miho Kuwahara, Tetsuya Hara   +10 more
wiley   +1 more source

Open and closed structures of L-arginine oxidase by cryo-electron microscopy and X-ray crystallography. [PDF]

J Biochem
Yamaguchi H, Takahashi K, Numoto N, Suzuki H, Tatsumi M, Kamegawa A, Nishikawa K, Asano Y, Mizukoshi T, Miyano H, Fujiyoshi Y, Sugiki M.   +11 more
europepmc   +1 more source

Routes to Cyclobutadiene and Cycloallyl Pt(II) Complexes: Dicationic Bis(Alkyne) Species as Intermediates

Chemistry – A European Journal, EarlyView.
This work demonstrates the synthesis of cationic Pt(II) η3‐cycloallyl complexes, and experimental and computational studies show a ligand bite‐angle dependence of their formation rates. The reactivity of these complexes with Brønsted acids was investigated, leading to the formation of cationic and dicationic Pt(II) η4‐cyclobutadiene complexes ...
Ouchan He, Froze Jameel, Y. Einar H. Stampehl, Liza M. Richter, Matteo Tosi, Martin Kaupp, Thomas Braun   +6 more
wiley   +1 more source

Crystal engineering of a 1:1 5-fluoro-cytosine-4-hy-droxy-benzaldehyde cocrystal: insights from X-ray crystallography and Hirshfeld analysis. [PDF]

Acta Crystallogr E Crystallogr Commun
Sangavi M, Mohana M, Butcher RJ, McMillen CD.   +3 more
europepmc   +1 more source

Oxidative Generation and Reactivity of the Cyclopropyl Radical From a Martin Silicate

Chemistry – A European Journal, EarlyView.
A photoredox strategy employing Martin silicates enables the oxidative generation and controlled capture of cyclopropyl radicals, including the naked one, long considered challenging intermediates. The method affords functionalized cyclopropanes through both Giese‐type additions and dual nickel/photoredox C(sp3)−C(sp2) cross‐couplings.
Amal Lakhal, Alexandre Millanvois, Louis Fensterbank, Cyril Ollivier   +3 more
wiley   +1 more source

Stereoretentive Nucleophilic Aromatic Substitution Accesses Atropisomeric 4‐Amino‐N‐Arylquinolinium Salts

Chemistry – A European Journal, EarlyView.
Quinolin‐4‐ones were converted to chloroquinolinium salts, allowing formation of axially chiral aminoquinolinium salts via an enantioretentive SNAr reaction with a variety of amine nucleophiles. The salts have a high rotational barrier, with a racemization half‐life of ∼1000s of years.
Darren Holmes, Nia Foster, Saima Ansari, Paul Kavanagh, Paul Dingwall, Peter C. Knipe   +5 more
wiley   +1 more source

Cyclic Olefin Copolymer-Based Fixed-Target Sample Delivery Device for Protein X-ray Crystallography. [PDF]

Anal Chem
Manna A, Sonker M, Koh D, Steiger M, Ansari A, Hu H, Quereda-Moraleda I, Grieco A, Doppler D, de Sanctis D, Basu S, Orlans J, Rose SL, Botha S, Martin-Garcia JM, Ros A.   +15 more
europepmc   +1 more source