Results 81 to 90 of about 386,929 (385)

Green tea polyphenols supplementation alters immunometabolism and oxidative stress in dairy cows with hyperketonemia

open access: yesAnimal Nutrition, 2021
Peripartal cows often experience negative energy balance, and are therefore prone to suffering from metabolic diseases such as hyperketonemia, which causes financial losses in dairy farms.
Yanfen Ma   +10 more
doaj   +1 more source

Thermodynamic bounds on the ultra- and infra-affinity of Hsp70 for its substrates [PDF]

open access: yes, 2017
The 70 kDa Heat Shock Proteins Hsp70 have several essential functions in living systems, such as protecting cells against protein aggregation, assisting protein folding, remodeling protein complexes and driving the translocation into organelles.
Hartich, David   +3 more
core   +2 more sources

Pathogenic Neurofibromatosis type 1 gene variants in tumors of non‐NF1 patients and role of R1276

open access: yesFEBS Open Bio, EarlyView.
Somatic variants of the neurofibromatosis type 1 (NF1) gene occur across neoplasms without clinical manifestation of the disease NF1. We identified emerging somatic pathogenic NF1 variants and hotspots, for example, at the arginine finger 1276. Those missense variants provide fundamental information about neurofibromin's role in cancer.
Mareike Selig   +7 more
wiley   +1 more source

Exocytosis from permeabilized bovine adrenal chromaffin cells is differently modulated by guanosine 5'-[gamma-thio]triphosphate and guanosine 5'-[beta gamma-imido]triphosphate [PDF]

open access: yes, 1992
1. In bovine adrenal chromaffin cells made permeable either to molecules less than or equal to 3 kDa with alphatoxin or to proteins less than or equal to 150 kDa with streptolysin O, the GTP analogues guanosine 5'-[beta gamma-imido]triphosphate (p[NH]ppG)
Ahnert-Hilger, G.   +5 more
core  

Molecular architecture of Gαo and the structural basis for RGS16-mediated deactivation [PDF]

open access: yes, 2008
Heterotrimeric G proteins relay extracellular cues from heptahelical transmembrane receptors to downstream effector molecules. Composed of an α subunit with intrinsic GTPase activity and a βγ heterodimer, the trimeric complex dissociates upon receptor ...
Berman   +34 more
core   +4 more sources

Elderly Liver Grafts are More Susceptible to Ischemia‐Reperfusion After Prolonged Cold Ischemia than Grafts from Young Donors—An Ex Vivo Liver Machine Perfusion Analysis in Sprague Dawley Rats

open access: yesAdvanced Therapeutics, EarlyView.
This study investigates how donor age and cold ischemia time influence liver perfusion parameters and injury markers. Older livers are more susceptible to longer ischemia times displaying more tissue damage, and higher expression of oxidative stress and apoptosis‐related proteins than livers with shorter ischemia times.
Leonard Boerger   +12 more
wiley   +1 more source

Hydrolysis-deficient mosaic microtubules as faithful mimics of the GTP cap

open access: yesNature Communications
A critical feature of microtubules is their GTP cap, a stabilizing GTP-tubulin rich region at growing microtubule ends. Microtubules polymerized in the presence of GTP analogs or from GTP hydrolysis-deficient tubulin mutants have been used as GTP-cap ...
Juan Estévez-Gallego   +7 more
doaj   +1 more source

Autopromotion of K-Ras4B Feedback Activation Through an SOS-Mediated Long-Range Allosteric Effect

open access: yesFrontiers in Molecular Biosciences, 2022
The Ras-specific guanine nucleotide exchange factors Son of Sevenless (SOS) regulates Ras activation by converting inactive GDP-bound to active GTP-bound states.
Xuan He   +9 more
doaj   +1 more source

Prolonging assembly through dissociation:A self assembly paradigm in microtubules

open access: yes, 2011
We study a one-dimensional model of microtubule assembly/disassembly in which GTP bound to tubulins within the microtubule undergoes stochastic hydrolysis.
Bulbul Chakraborty   +4 more
core   +1 more source

Structural insight into TPX2-stimulated microtubule assembly [PDF]

open access: yes, 2017
During mitosis and meiosis, microtubule (MT) assembly is locally upregulated by the chromatin-dependent Ran-GTP pathway. One of its key targets is the MT-associated spindle assembly factor TPX2.
Nogales, Eva   +3 more
core   +2 more sources

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