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13:19
Chemical Triphosphorylation of Oligonucleotides
Published on: June 2, 2022
Amino-acyl tRNA synthetases generate dinucleotide polyphosphates as second messengers: functional implications
Sagi Tshori1, Ehud Razin, Hovav Nechushtan
1Department of Nuclear Medicine, Hadassah Hebrew University Medical Center, Jerusalem, Israel.
Topics in Current Chemistry
|March 29, 2013
Summary
Aminoacyl-tRNA synthetases (aaRS) produce dinucleotide polyphosphates, acting as crucial signaling molecules and second messengers in cellular processes beyond protein translation. These molecules regulate cell cycle, differentiation, and inflammation.
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Signaling
Background:
- Aminoacyl-tRNA synthetases (aaRS) are primarily known for their essential role in protein synthesis.
- Recent research indicates that aaRS possess additional
- moonlighting
- functions beyond tRNA aminoacylation.
- These non-canonical roles involve the regulation of diverse cellular processes.
Purpose of the Study:
- To explore the production of dinucleotide polyphosphates by aaRS.
- To elucidate the signaling roles of these molecules, including diadenosine tetraphosphate and diadenosine triphosphate.
- To understand their function as second messengers in cellular communication.
Main Methods:
- Review of existing literature on aaRS functions and dinucleotide polyphosphate signaling.
- Analysis of studies investigating the interaction of aaRS-produced dinucleotide polyphosphates with cellular signaling pathways.
- Examination of evidence supporting the role of these molecules as extracellular and intracellular signals.
Main Results:
- aaRS produce biologically active dinucleotide polyphosphates under various physiological conditions.
- These dinucleotide polyphosphates, such as diadenosine tetraphosphate and diadenosine triphosphate, function as second messengers.
- aaRS-mediated signaling pathways are involved in cell cycle control, tissue differentiation, chemotaxis, and inflammation.
Conclusions:
- aaRS play a multifaceted role in cellular regulation, extending beyond their canonical function in translation.
- Dinucleotide polyphosphates produced by aaRS are critical signaling molecules with significant physiological impact.
- Further research into aaRS moonlighting functions and dinucleotide polyphosphate signaling holds promise for understanding complex biological processes.
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