Results 51 to 60 of about 6,668,606 (250)

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Ethyl 2-[(azidocarbonyl)amino]benzoate

IUCrData, 2016
In the almost planar (r.m.s. deviation = 0.038 Å) title compound, C10H10N4O3, an intramolecular N—H...O interaction closes an S(6) ring. In the crystal, aromatic π–π stacking interactions occur [inter-centroid distance = 3.65 (2) Å].
Hasna Yassine, Abderrafia Hafid, Mostafa Khouili, Olivier Mentre, El Mostafa Ketatni   +4 more
doaj   +1 more source

Hydrogen and Lithium Bonds—Lewis Acid Units Possessing Multi-Center Covalent Bonds

Molecules, 2021
MP2/aug-cc-pVTZ calculations were carried out on complexes wherein the proton or the lithium cation is located between π-electron systems, or between π-electron and σ-electron units.
Mohammad Aarabi, Samira Gholami, Sławomir J. Grabowski   +2 more
doaj   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

tert-Butyl 2,3-dihydro-1H-cyclopenta[b]indole-4-carboxylate

IUCrData, 2016
In the title molecule, C16H19NO2, all the non-hydrogen atoms except two of the C atoms of the tert-butyl group lie on a crystallographic mirror plane. No classical hydrogen bonds are observed.
Jason A. Jordon, Jeanese C. Badenock, Gordon W. Gribble, Manpreet Kaur, Jerry P. Jasinski   +4 more
doaj   +1 more source

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source

Asymptotically safe weak interactions [PDF]

, 2010
We emphasize that the electroweak interactions without a Higgs boson are very similar to quantum general relativity. The Higgs field could just be a dressing field and might not exist as a propagating particle.
Calmet, Xavier
core   +2 more sources

pH‐mediated activation of the lysosomal arginine sensor SLC38A9

FEBS Letters, EarlyView.
Cells monitor nutrient levels via the lysosomal transporter SLC38A9 to activate the mechanistic target of rapamycin complex 1 (mTORC1). This study reveals that SLC38A9 function is regulated by pH. We identified histidine 544 as a critical pH sensor that undergoes conformational changes to control amino acid efflux from lysosomes; therefore, it ...
Xuelang Mu, Ampon Sae Her, Tamir Gonen
wiley   +1 more source

Ligand-Receptor Interactions

, 2008
The formation and dissociation of specific noncovalent interactions between a variety of macromolecules play a crucial role in the function of biological systems.
Alder B J, Alon R, Amit A G, André P, Antosiewicz J, Ashkin A, Atherton A, Atherton A, Balsera M, Beeson C, Bell G I, Bell G I, Berg H C, Berg H C, Bhat T N, Boland T, Bongrand P, Bongrand P, Brady G P, Brooks B R, Brune D, Brunk D K, Böhm H J, Böhm H J, Cantor C R, Capo C, Chesla S E, Chilkoti A, Choquet D, Chu L, Clackson T, Claesson P M, Collins F C, Connelly P R, Creighton T E, Creighton T E, Curtis A S G, Danmer U, Danmer U, Debye P, deLisi C, Dembo M, Dustin M L, Eisenberg D, Eisenberg D, Erlandsson R, Ermak D L, Evans E, Evans E, Evans E A, Evans E A, Evans E A, Evans E A, Evans E A, Eyring H, Eyring H, Fersht A, Florin E L, Gabdouline R R, Garboczi D N, Gilson M K, Goldsmith H L, Grubmüller H, Grutter M G, Hammer D A, Hammer D A, Helm C, Hill T L, Hirschefelder J O, Hoh J H, Honig B, Israelachvili J N, Israelachvili J N, Israelachvili J N, Izrailev S, Jencks W P, Jorgensen W L, Jorgensen W L, Kabat E A, Kaplanski G, Karplus M, Kishino A, Kozack R E, Kramers H A, Kuo S C, Kupfer A, Kwong D, Lawrence M B, Lawrence M B, Leckband D E, Leckband D E, Lee B, Lee C Y, Lee G U, Liebert R B, Lollo B A, London F, Maitland G C, Margenau H, Marston S B, Martorana V, McClay D R, McCloskey M A, Merkel R, Metropolis M, Meyhöfer E, Miyamoto S, Moy V T, Nishizaka T, Northrup S H, Northrup S H, Ooi T, Page M J, Palecek S P, Pangali C, Patel K D, Pauling L, Pierres A, Pierres A, Pierres A, Piper J W, Pratt L R, Richards F F, Richards F M, Rossky P J, Sato M, Schmid-Schöenbein G W, Schoup D, Schreiber G, Schuster P, Schwartz L, Smith S B, Sommerfeld A, Sommerfeld A, Steward M W, Stone S R, Stossel T P, Strick T R, Sturtevant J M, Szabo A, Szabo A, Szczesniak M M, Tees D F, Tha S P, Tsao Y H, Tulip W R, Vajda S, Valentine R C, van der Merwe P A, Vinckier A, von Andrian U H, von Fuchs, von Smoluchowski M, Voss Jr E W, Weast R C, Weber P C, Williams A-F, Winter C C, Wurmser R, Zurkhov S N   +159 more
core   +1 more source

PARP inhibition and pharmacological ascorbate demonstrate synergy in castration‐resistant prostate cancer

Molecular Oncology, EarlyView.
Pharmacologic ascorbate (vitamin C) increases ROS, disrupts cellular metabolism, and induces DNA damage in CRPC cells. These effects sensitize tumors to PARP inhibition, producing synergistic growth suppression with olaparib in vitro and significantly delayed tumor progression in vivo. Pyruvate rescue confirms ROS‐dependent activity.
Nicolas Gordon, Peter T. Gallagher, Orly I. Richter, Neermala Poudel Neupane, Amy C. Mandigo, Jennifer J. McCann, Emanuela Dylgjeri, Irina Vasilevskaya, Christopher McNair, Channing J. Paller, Wm. Kevin Kelly, Karen E. Knudsen, Matthew J. Schiewer, Ayesha A. Shafi   +13 more
wiley   +1 more source