Results 71 to 80 of about 119,956 (261)

Hyperosmotic stress‐induced redistribution of pre‐mRNA cleavage factor I subunits is associated with shifts in alternative polyadenylation

FEBS Open Bio, EarlyView.
Hyperosmotic stress triggers the relocation of the CFIm complex from the nucleus to the cytoplasm. This shift creates a nuclear ‘stoichiometric bottleneck’, limiting CFIm availability for mRNA processing. Consequently, specific mRNAs like NUDT21 and DICER1 undergo targeted 3′UTR shortening, demonstrating how spatial protein dynamics drive rapid ...
Hitomi Soumiya, Masatake Osawa, Hidefumi Fukumitsu   +2 more
wiley   +1 more source

Exploring the interaction dynamics of eukaryotic translation initiation factor 2

Biochemical Society Transactions
Eukaryotic translation initiation typically involves recruitment of the 43S ribosomal pre-initiation complex (PIC) to the 5′-end of the mRNA to form the 48S PIC, followed by scanning in search of a start codon in a favorable nucleotide complex. The start codon is recognized through base-pairing with the anticodon of the initiator Met-tRNAi.
openaire   +2 more sources

Indirect inactivation of eukaryotic initiation factor 2 in reticulocyte lysate by selenite.

Journal of Biological Chemistry, 1980
Addition of selenite to rabbit reticulocyte lysate produces a biphasic pattern of translational inhibition. Sucrose density gradient shows that the onset of translational inhibition is accompanied by decreased Met-tRNAf binding to 43 SN ribosomal subunits and loss of polysomes.
B, Safer, R, Jagus, D, Crouch
openaire   +2 more sources

From energy provision to protein synthesis: Tunnelling nanotubes as mediators of intercellular metabolic cooperation in cancer

FEBS Open Bio, EarlyView.
The cytoskeleton‐mediated transport of mitochondria via tunnelling nanotubes restores respiration, increases ATP production, rescues cells from apoptosis, activates the AKT/mTOR signalling pathway, promotes cell migration and invasiveness, contributes to cancer progression and treatment resistance.
Stanislava Martínková, Jan Trnka
wiley   +1 more source

Cross Talk between eIF2α and eEF2 Phosphorylation Pathways Optimizes Translational Arrest in Response to Oxidative Stress

iScience, 2019
Summary: The cellular stress response triggers a cascade of events leading to transcriptional reprogramming and a transient inhibition of global protein synthesis, which is thought to be mediated by phosphorylation of eukaryotic initiation factor-2α ...
Marisa Sanchez, Yingying Lin, Chih-Cheng Yang, Philip McQuary, Alexandre Rosa Campos, Pedro Aza Blanc, Dieter A. Wolf   +6 more
doaj   +1 more source

Yeast Gcn2 retains activity following humanization of its auto‐phosphorylation region

FEBS Open Bio, EarlyView.
Using Saccharomyces cerevisiae as a model to study Gcn2 activation and regulation is limited by the lack of antibodies detecting phosphorylated Gcn2. To overcome this, we engineered Gcn2‐HsC, a yeast Gcn2 variant recognizable by commercial anti‐human phospho‐GCN2 antibodies.
Reuben A. Anderson, Anja H. Schiemann, Evelyn Sattlegger   +2 more
wiley   +1 more source

eIF2α phosphorylation-ATF4 axis-mediated transcriptional reprogramming mitigates mitochondrial impairment during ER stress

Molecules and Cells
: Eukaryotic translation initiation factor 2α (eIF2α) phosphorylation, which regulates all 3 unfolded protein response pathways, helps maintain cellular homeostasis and overcome endoplasmic reticulum (ER) stress through transcriptional and translational ...
Hien Thi Le, Jiyoung Yu, Hee Sung Ahn, Mi-Jeong Kim, In Gyeong Chae, Hyun-Nam Cho, Juhee Kim, Hye-Kyung Park, Hyuk Nam Kwon, Han-Jung Chae, Byoung Heon Kang, Jeong Kon Seo, Kyunggon Kim, Sung Hoon Back   +13 more
doaj   +1 more source

Ionomycin suppresses cancer cell growth by disrupting mitochondrial transcription

FEBS Open Bio, EarlyView.
In this study, we identify a new function for the selective Ca2+ ionophore, ionomycin, as an inhibitor of mitochondrial transcription. Both total and nascent RNA analyses revealed that ionomycin treatment reduces the transcription of mitochondrial genes.
Lishen Wang, Mingqiang Deng, Dongmei He, Diqin Lai, Dongjun Liu, Dengyong Zhu, Zhenhua Zhang, Peng Tang, Chuanman Zhou, Menghui Yin, Xichen Bao   +10 more
wiley   +1 more source

Mitochondrial Dysfunction and Stress Responses in Alzheimer’s Disease

Biology, 2019
Alzheimer’s disease (AD) patients display widespread mitochondrial defects. Brain hypometabolism occurs alongside mitochondrial defects, and correlates well with cognitive decline.
Ian Weidling, Russell H. Swerdlow
doaj   +1 more source

Hepatitis E Virus Protease Inhibits the Activity of Eukaryotic Initiation Factor 2-Alpha Kinase 4 and Promotes Virus Survival. [PDF]

J Virol, 2023
Kumar A, Subramani C, Raj S, Ranjith-Kumar CT, Surjit M.   +4 more
europepmc   +1 more source