Results 71 to 80 of about 85,574 (298)

Mechanical properties of tubulin intra- and inter-dimer interfaces and their implications for microtubule dynamic instability.

PLoS Computational Biology, 2019
Thirteen tubulin protofilaments, made of αβ-tubulin heterodimers, interact laterally to produce cytoskeletal microtubules. Microtubules exhibit the striking property of dynamic instability, manifested in their intermittent growth and shrinkage at both ...
Vladimir A Fedorov, Philipp S Orekhov, Ekaterina G Kholina, Artem A Zhmurov, Fazoil I Ataullakhanov, Ilya B Kovalenko, Nikita B Gudimchuk   +6 more
doaj   +1 more source

Revisiting the microtubule based quantum models of mind: tubulin bound GTP cannot pump microtubule coherence or provide energy for alpha <-> beta computation in stable microtubules [PDF]

, 2003
The current paper investigates the biological models of stable brain microtubules as quantum or classical computers whose function is based on electron hopping associated with kinking of the tubulin dimer. Hameroff (1998a, 1998b, 2003a, 2003b), Tuszynski
Georgiev, Danko
core  

Tailoring therapy for heart failure: the pharmacogenomics of adrenergic receptor signaling. [PDF]

, 2014
Heart failure is one of the leading causes of mortality in Western countries, and β-blockers are a cornerstone of its treatment. However, the response to these drugs is variable among individuals, which might be explained, at least in part, by genetic ...
Barrese, V, Femminella, GD, Ferrara, N, Rengo, G   +3 more
core   +2 more sources

Glucocorticoids and the regulation of phosphoenolpyruvate carboxykinase (guanosine triphosphate) in the rat [PDF]

Biochemical Journal, 1975
The effect glucocorticoids on the synthesis and degradation of phosphoenolpyruvate carboxykinase (GTP)(EC4.1.1.32) in rat liver and kidney in vivo was studied immunochemically. The glucocorticoid analogue triamcinolone (9α-fluoro-11β, 21-dihydroxy-16α,17α-isopropylidenedioxypregna-1,4-diene-3,20-dione) increased the synthesis rate of the kidney enzyme ...
J M, Gunn, R W, Hanson, O, Meyuhas, L, Reshef, F J, Ballard   +4 more
openaire   +2 more sources

Tumor‐Derived Alpha‐1 Antitrypsin Promotes Liver Metastasis of Colorectal Cancer Through the Neutrophil Extracellular Traps–CCDC25 Pathway

Advanced Science, EarlyView.
ABSTRACT Liver metastasis is a leading cause of mortality in colorectal cancer (CRC), where the inflammatory tumor microenvironment, specifically neutrophil infiltration, significantly promotes metastatic colonization. This study reveals a pro‐metastatic role for alpha‐1 antitrypsin (A1AT) in CRC liver metastasis via a dual mechanism involving ...
Qian Fei, Chunning Li, Lei Zhan, Xiaoyan Li, Yan Hui, Yue Jin, Jing Zhang, Lu Yang, Xin Sun, Xiaoxi Li, Qian Dong, Jingdong Zhang   +11 more
wiley   +1 more source

GTP-Dependent Regulation of CTP Synthase: Evolving Insights into Allosteric Activation and NH₃ Translocation

Biomolecules, 2022
Cytidine-5′-triphosphate (CTP) synthase (CTPS) is the class I glutamine-dependent amidotransferase (GAT) that catalyzes the last step in the de novo biosynthesis of CTP.
Stephen L. Bearne, Chen-Jun Guo, Ji-Long Liu   +2 more
doaj   +1 more source

Amylase release from streptolysin O-permeabilized pancreatic acinar cells. Effects of Ca2+, guanosine 5'-[gamma-thio]triphosphate, cyclic AMP, tetanus toxin and botulinum A toxin [PDF]

, 1992
The molecular requirements for amylase release and the intracellular effects of botulinum A toxin and tetanus toxin on amylase release were investigated using rat pancreatic acinar cells permeabilized with streptolysin O.
Ahnert-Hilger, G., Gratzl, Manfred, Kemmer, T. P., Stecher, B., Weller, U.   +4 more
core  

Spatiotemporal Control of Formation of Dynamic Protein Fiber Assemblies via Photophysical Effects of a Focused Laser Beam

Advanced Science, EarlyView.
Tightly focused laser irradiation can accumulate tubulin proteins at/around the laser focus, which leads to the formation of highly ordered microtubule assemblies. The assemblies can exhibit various dynamic behaviors such as radial motion, bundling, and flagella‐like rotation with motor protein and chemical energy, highlighting as a unique tool for ...
Hiroshi Y. Yoshikawa, Ren Shirata, Takuya Takeshige, Riki Yoshida, Fumika Kiryu, Kei Takano, Shuma Matsumoto, Reiji Kawanami, Natsumi Sawada, Chi‐Shiun Wu, Yang‐Hsin Shih, Hiromasa Niinomi, Takahisa Matsuzaki, Seiichiro Nakabayashi, Tomoaki Matsuura, Teruki Sugiyama, Ryuzo Kawamura   +16 more
wiley   +1 more source

The role of free nucleotides in heart failure

Кардиоваскулярная терапия и профилактика
Aim. To assess the potential of studying the plasma level of free nucleotides as additional biomarkers of heart failure (HF) taking into account the clinical and paraclinical data of the patient, and to analyze its change during therapy.Material and ...
E. V. Kolesnikova, O. V. Myachina, A. N. Pashkov, A. A. Pashkova   +3 more
doaj   +1 more source

A metazoan/plant-like capping enzyme and cap modified nucleotides in the unicellular eukaryote Trichomonas vaginalis. [PDF]

PLoS Pathogens, 2010
The cap structure of eukaryotic messenger RNAs is initially elaborated through three enzymatic reactions: hydrolysis of the 5'-triphosphate, transfer of guanosine through a 5'-5' triphosphate linkage and N7-methylation of the guanine cap.
Augusto Simoes-Barbosa, Robert P Hirt, Patricia J Johnson   +2 more
doaj   +1 more source