Results 51 to 60 of about 6,619,678 (245)

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

Interactions in Quasicrystals

, 1999
Although the effects of interactions in solid state systems still remains a widely open subject, some limiting cases such as the three dimensional Fermi liquid or the one-dimensional Luttinger liquid are by now well understood when one is dealing with ...
Burkov S., DOMINIQUE MOUHANNA, JULIEN VIDAL, Klein T., THIERRY GIAMARCHI, Zhong J. X.   +5 more
core   +1 more source

Substrate specificity of Burkholderia pseudomallei multidrug transporters is influenced by the hydrophilic patch in the substrate‐binding pocket

FEBS Letters, EarlyView.
Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
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

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Strong Interactions at Low Energy [PDF]

, 2002
The lectures review some of the basic concepts relevant for an understanding of the low energy properties of the strong interactions: chiral symmetry, spontaneous symmetry breakdown, Goldstone bosons, quark condensate.
B. Ananthanarayan, B.L. Ioffe, C. Vafa, C.D. Froggatt, G. Amoros, G. Colangelo, G. Colangelo, G. Colangelo, G. Colangelo, H. Leutwyler, H. Leutwyler, H. Leutwyler, H. Leutwyler, J. Bijnens, J. Gasser, J. Gasser, J. Gasser, J. Heitger, J.F. Donoghue, L. Rosselet, M. Gell-Mann, M. Knecht, S. Weinberg, S. Weinberg, S.M. Roy, V. Lubicz, W. Heisenberg, Y. Nambu   +27 more
core   +3 more sources

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 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

Structural Achievability of an NH–π Interaction between Gln and Phe in a Crystal Structure of a Collagen-like Peptide

Biomolecules, 2022
NH–π interactions between polar and aromatic residues are well distributed in proteins whose stabilizing effects have been investigated in globular and fibrous proteins.
Ruixue Zhang, You Xu, Jun Lan, Shilong Fan, Jing Huang, Fei Xu   +5 more
doaj   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source