The amino acid sensor methionyl-tRNA synthetase is required for methionine-induced milk protein synthesis in a domestic pigeon model
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View abstract on PubMed
Summary
This summary is machine-generated.Methionyl-tRNA synthetase (MetRS) mediates methionine-induced crop milk protein synthesis through the JAK2/STAT5 pathway, enhancing pigeon squab growth. This research clarifies a key nutritional and signaling mechanism in avian reproduction.
Area Of Science
- Animal Science
- Biochemistry
- Molecular Biology
Background
- Crop milk production is crucial for avian offspring nutrition.
- The role of methionine (Met) and its related enzymes in avian crop milk synthesis is not fully understood.
- Janus kinase 2 (JAK2)/signal transducer and activator of transcription 5 (STAT5) pathway is implicated in protein synthesis.
Purpose Of The Study
- To investigate if methionyl-tRNA synthetase (MetRS) mediates methionine-induced crop milk protein synthesis.
- To elucidate the involvement of the JAK2/STAT5 signaling pathway in this process.
- To determine the impact on squab growth.
Main Methods
- Three experiments involving breeding pigeons with varying methionine levels and MetRS inhibitor (REP8839) treatments.
- Analysis of crop development, crop milk protein synthesis, and protein expression of MetRS, JAK2, and STAT5.
- Co-immunoprecipitation to assess protein interactions.
Main Results
- Methionine supplementation increased crop milk protein synthesis, MetRS, and JAK2/STAT5 pathway activation, improving squab growth.
- MetRS inhibition decreased these parameters and inhibited squab growth.
- Met supplementation rescued these effects in the presence of the inhibitor.
- An interaction between MetRS and JAK2 was confirmed.
Conclusions
- MetRS acts as a mediator for methionine-induced crop milk protein synthesis.
- The JAK2/STAT5 signaling pathway is essential for this process.
- MetRS-mediated signaling significantly impacts squab growth in breeding pigeons.
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