Results 61 to 70 of about 27,996,561 (298)

Effect of hemin on site-specific phosphorylation of eukaryotic initiation factor 2. [PDF]

Proceedings of the National Academy of Sciences, 1978
Initiation factor 2 (eIF-2) is phosphorylated in vitro by two different cyclic nucleotide-independent protein kinases. As previously shown, a protein kinase activity that comigrates with the major casein kinase activity from rabbit reticulocytes phosphorylates eIF-2beta.
S M, Tahara, J A, Traugh, S B, Sharp, T S, Lundak, B, Safer, W C, Merrick   +5 more
openaire   +2 more sources

‘Guide and Prejudice’— How Argonautes recognize targets across domains of life

FEBS Letters, EarlyView.
Argonaute proteins use short nucleic‐acid guides to locate and regulate specific targets across all domains of life. Despite striking diversity—from human gene silencing to bacterial immune defence—all Argonautes share a conserved three‐stage recognition logic: guide‐directed sampling, progressive target pairing with a conformational checkpoint and ...
Jack P. K. Bravo
wiley   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Interaction of yeast eIF4G with spliceosome components Implications in pre-mRNA processing events [PDF]

, 2009
As evidenced from mammalian cells the eukaryotic translation initiation factor eIF4G has a putative role in nuclear RNA metabolism. Here we investigate whether this role is conserved in the yeast Saccharomyces cerevisiae.
Lewis, Joe, Fromont-Racine, Micheline, Thompson, Elizabeth, Jacquier, Alain, Beggs, Jean, D., Barrass, J. David, Beggs, Jean D., Kafasla, Panagiota   +7 more
core   +1 more source

Guanabenz Treatment Accelerates Disease in a Mutant SOD1 Mouse Model of ALS.

PLoS ONE, 2015
Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease characterized by loss of motor neurons. The mechanisms leading to motor neuron degeneration in ALS are unclear.
Fernando G Vieira, Qinggong Ping, Andy J Moreno, Joshua D Kidd, Kenneth Thompson, Bingbing Jiang, John M Lincecum, Monica Z Wang, Gerard S De Zutter, Valerie R Tassinari, Beth Levine, Theo Hatzipetros, Alan Gill, Steven Perrin   +13 more
doaj   +1 more source

Cannabinoid Modulation of Eukaryotic Initiation Factors (eIF2α and eIF2B1) and Behavioral Cross-Sensitization to Cocaine in Adolescent Rats

Cell Reports, 2018
Summary: Reduced eukaryotic Initiation Factor 2 (eIF2)α phosphorylation (p-eIF2α) enhances protein synthesis, memory formation, and addiction-like behaviors.
Philippe A. Melas, Johanna S. Qvist, Matteo Deidda, Chirag Upreti, Ya Bin Wei, Fabrizio Sanna, Walter Fratta, Maria Scherma, Paola Fadda, Denise B. Kandel, Eric R. Kandel   +10 more
doaj   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Protein phosphatase 1 regulatory subunit 15 A promotes translation initiation and induces G2M phase arrest during cuproptosis in cancers

Cell Death and Disease
Copper ions play a crucial role as cofactors for essential enzymes in cellular processes. However, when the intracellular concentration of copper ions exceeds the homeostatic threshold, they become toxic to cells.
Chunyu Liu, Liang Chen, Yukun Cong, Lulin Cheng, Yujun Shuai, Fang Lv, Kang Chen, Yarong Song, Yifei Xing   +8 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Homeostatic responses to amino acid insufficiency

Animal Nutrition, 2015
This article provides a brief overview describing how two key signaling pathways, namely the integrated stress response and the mammalian target of rapamycin complex 1, work together to facilitate cellular adaptation to dietary amino acid insufficiency ...
Tracy G. Anthony
doaj   +1 more source