Results 51 to 60 of about 1,847,339 (304)

2-[(Pyridin-3-ylamino)methyl]phenol

Acta Crystallographica Section E, 2011
In the title compound, C12H12N2O, the aromatic rings at either ends of the –CH2–NH– link are twisted by 68.79 (7)°.
Jing Xu, Shan Gao, Seik Weng Ng
doaj   +1 more source

Hydrogen-Bond-Donor-Directed Switching of Enantioselectivity in the Vinylogous AldolCyclization Cascade Reaction of Prostereogenic 3Alkylidene Oxindoles with Isatins and oQuinones

, 2022
In this study, we reported a hydrogen-bond-donor-directed enantiodivergent vinylogous aldol–cyclization cascade reaction of 3-alkylidene oxindoles with isatins and o-quinones.
Yun-Jie Tsou (12009097), Jeng-Liang Han, Jeng-Liang Han (2073691), Ting-An Lee, Hsin-Tsung Chen (1268964), Nadaraj Sathishkumar (11819678), I-Ting Chen (3084588), Ting-An Lee (12009100), Nadaraj Sathishkumar, Yun-Jie Tsou, Hsin-Tsung Chen, I-Ting Chen   +11 more
core   +1 more source

Emerging experimental and computational methods for studying redox‐regulated structural transitions

FEBS Letters, EarlyView.
Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass, Dana Reichmann, Gábor Erdős   +2 more
wiley   +1 more source

Quantifying hydrogen bonding using electrically tunable nanoconfined water

Nature Communications
Hydrogen bonding plays a crucial role in biology and technology, yet it remains poorly understood and quantified despite its fundamental importance. Traditional models, which describe hydrogen bonds as electrostatic interactions between electropositive ...
Ziwei Wang, Anupam Bhattacharya, Mehmet Yagmurcukardes, Vasyl Kravets, Pablo Díaz-Núñez, Ciaran Mullan, Ivan Timokhin, Takashi Taniguchi, Kenji Watanabe, Alexander N. Grigorenko, Francois Peeters, Kostya S. Novoselov, Qian Yang, Artem Mishchenko   +13 more
doaj   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

l-Alanine hydrochloride monohydrate

Acta Crystallographica Section E, 2008
Colorless crystals of l-alanine hydrochloride monohydrate, C3H8NO2+·Cl−·H2O, were obtained from a powder sample that had been left standing in a refrigerator for a few years.
Shigeyuki Yokoyama, Toshio Yamazaki, Tadashi Shimizu, Akira Sato, Kazuhiko Yamada   +4 more
doaj   +1 more source

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

FEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil, Jeffrey A. Hawkes, Cecilia Blikstad, Pia Lindberg   +3 more
wiley   +1 more source

Synthesis and structure of (E)-3,4,5-trihydroxy-N′-(3,4,5-trimethoxybenzylidene)benzohydrazide monohydrate

Acta Crystallographica Section E: Crystallographic Communications
In the structure of the title compound, C17H18N2O7·H2O, hydrogen bonds link three molecules to the water molecule. Additional hydrogen-bonding interactions connect two molecules via the amide nitrogen donor and two methoxy oxygen acceptors.
Mamadou Lo, Bineta Sene, Adji Fatou Fall Pouye, Arie van der Lee, Abdoulaye Gassama, Sébastien Richeter   +5 more
doaj   +1 more source

(Z)-N-Methyl-2-(5-methyl-2-oxoindolin-3-ylidene)hydrazinecarbothioamide

Acta Crystallographica Section E, 2012
In the title compound, C11H12N4OS, an intramolecular N—H...O hydrogen bond generates an S(6) ring motif. In the crystal, the molecules form a helical chain along the a axis through an N—H...O hydrogen bond.
Amna Qasem Ali, Naser Eltaher Eltayeb, Siang Guan Teoh, Abdussalam Salhin, Hoong-Kun Fun   +4 more
doaj   +1 more source

SOLITONS IN HYDROGEN-BONDED CHAINS

Le Journal de Physique Colloques, 1988
A one dimensional model for hydrogen bonded chains is investigated by including the dynamical degrees of freedom of the oxygens and thus generalizing the original Antonchenko-Davydov-Zolotaryuk model. Analytical solutions are derived within a continuum approximation up to second order so that rather narrow solutions could be derived accurately enough ...
Desfontaines, H., Peyrard, M., Hochstrasser, D., Büttner, H.   +3 more
openaire   +2 more sources