Results 121 to 130 of about 4,909 (260)

The Embryonic Development of the Cotylean Polyclad Phrikoceros jannetae

Acta Zoologica, EarlyView.
ABSTRACT Polyclads exhibit distinct developmental modes ranging from direct to indirect development, with several transitional stages also recognised. The existence of an indirect developmental mode in polyclads with a planktonic life history stage in the form of a free‐swimming larva is unique among all free‐living flatworms and makes polyclads a ...
Mehrez Gammoudi, Bernhard Egger, Isabel L. Dittmann, Verónica N. Bulnes, Pavel Tomancak, Abdel Halim Harrath, Johannes Girstmair   +6 more
wiley   +1 more source

Dualsteric and dual‐acting modulation of muscarinic receptors by antagonist KH‐5

British Journal of Pharmacology, EarlyView.
Abstract Background and purpose Muscarinic acetylcholine receptors are key therapeutic targets, and ligands engaging both orthosteric and allosteric sites may offer improved selectivity and efficacy. Here, we investigated whether the muscarinic antagonist KH‐5 acts as a dualsteric antagonist and defined its mode of interaction with muscarinic receptors.
Alena Janoušková‐Randáková, Eva Dolejší, Nikolai Chetverikov, Jan Jakubík   +3 more
wiley   +1 more source

Rosemary metabolite carnosic acid opens Kv1.1 via its voltage sensor and corrects Kv1.1‐linked episodic ataxia in mice

British Journal of Pharmacology, EarlyView.
Background and Purpose Episodic ataxia type 1 (EA1) is an autosomal dominant neurological disorder caused primarily by loss‐of‐function mutations in the voltage‐gated potassium channel Kv1.1 (KCNA1). Small molecules that restore Kv1.1 activity hold promise as targeted therapies for EA1, yet current pharmacological strategies remain limited ...
Rían W. Manville, Ryan F. Yoshimura, Hanh A. Nguyen, Ruiming Zhao, Derk J. Hogenkamp, Steve A. N. Goldstein, Geoffrey W. Abbott   +6 more
wiley   +1 more source

Contrasting effects of different molecular crowding environments on base‐pair opening/closing dynamics of DNA triplex structures

The FEBS Journal, EarlyView.
Base‐pair opening and closing regulate nucleic‐acid structure, stability, and function, but how these motions behave under intracellular molecular crowding remains unclear. Using NMR, we quantified these dynamics in a DNA triplex under two crowder‐reconstituted environments that mimic cellular crowding.
Tomoki Sakamoto, Yudai Yamaoki, Takashi Nagata, Masato Katahira   +3 more
wiley   +1 more source

Advancing quadruple helix theory for health systems innovation: evidence from Ageing@Coimbra. [PDF]

BMC Health Serv Res
Ricciardelli A, Mercurio L, Salvatore C.
europepmc   +1 more source

Genetic dissection reveals distinct contributions of the eS31 N‐terminal domain to translational accuracy in Saccharomyces cerevisiae

The FEBS Journal, EarlyView.
The eukaryote‐specific N‐terminal domain (NTD) of eS31 uses two distinct strategies to maintain translation fidelity. During elongation, a positively charged “hotspot” fine‐tunes the selection of incoming aa‐tRNA. During termination, the entire NTD acts as a structural scaffold to ensure the correct positioning of the release factor eRF1.
Qingxuan Gao, Hiroshi Otsuka, Kei Endo, Koichi Ito   +3 more
wiley   +1 more source

Quadruple Helix Inversions of Liquid Crystals Orchestrated by Direct Chirality Transmission of an Intrinsically Chiral Light-Driven Molecular Machine. [PDF]

Adv Mater
Sheng J, Ryabchun A, Long G, Feringa BL.
europepmc   +1 more source

Discovery of a cryptic aminoacidic triad involved in the temperature adaptation of GH1 enzymes

The FEBS Journal, EarlyView.
Cold‐active enzymes retain high catalytic activity at low temperatures but are characterized by thermal instability, a behavior not fully understood. Comparison between a cold‐active GH1 and its mesophilic counterparts highlights the role of a three‐residue motif (W‐M‐F) in conferring structural stability to a mesophilic GH1.
Stefania Digiovanni, Gabriel Oanca, Marco Orlando, Marina Lotti, Johan Åqvist, Marco Mangiagalli   +5 more
wiley   +1 more source

Structural insights into tyrosine sulfation of CCR5 by human tyrosylprotein sulfotransferase‐1

The FEBS Journal, EarlyView.
Structural analysis of human tyrosylprotein sulfotransferase‐1 (hTPST1) bound to a CCR5 N‐terminal peptide reveals how hTPST1 recognizes the Tyr3 sulfation site. Structure‐guided models of additional CCR5 sulfation states and full‐length assemblies provide a framework for understanding CCR5 tyrosine sulfation, a post‐translational modification relevant
Shinnosuke Tanaka, Hirai Asano, Kota Toyoda, Toshiaki Nishiyori, Hidetaka Kojo, Kazuto Kiyomatsu, Katsuhisa Kurogi, Yoichi Sakakibara, Etsuko Nishimoto, Takamasa Teramoto, Yoshimitsu Kakuta   +10 more
wiley   +1 more source

Directional information flow in human frataxin defines allosteric pathways connecting the hydrophobic core to the iron‐binding ridge

The FEBS Journal, EarlyView.
Human frataxin deficiency causes Friedreich's ataxia, yet how iron‐binding events are communicated across the protein is unclear. Using transfer entropy analysis of molecular dynamics simulations, we identify buried hydrophobic core leucines (LEU136, LEU140) as the source of directional signaling toward the iron‐binding acidic ridge.
Kevser Kübra Kırboğa, Ecir Uğur Küçüksille   +1 more
wiley   +1 more source