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Sequence of a cDNA encoding wheat eukaryotic protein synthesis initiation factor 4A
1Department of Chemistry and Biochemistry, University of Texas at Austin 78712.
Gene
|September 15, 1993
Summary
Researchers isolated and sequenced wheat translation initiation factor 4A (eIF-4A) cDNA. They identified conserved RNA helicase, ATP-binding, and hydrolysis sites by comparing it to other species.
Area of Science:
- Molecular Biology
- Plant Science
- Biochemistry
Background:
- Translation initiation is a critical regulatory step in gene expression.
- Translation initiation factor 4A (eIF-4A) plays a key role in this process.
- Understanding plant eIF-4A is crucial for crop improvement.
Purpose of the Study:
- To isolate and characterize the wheat translation initiation factor 4A (eIF-4A) gene.
- To compare the wheat eIF-4A sequence with homologous proteins from other organisms.
- To identify conserved functional domains within wheat eIF-4A.
Main Methods:
- Wheat cDNA library construction and screening.
- DNA sequencing of the isolated cDNA.
- Bioinformatic analysis and sequence alignment of deduced amino acid sequences.
Main Results:
- A full-length cDNA encoding wheat eIF-4A was successfully isolated and sequenced.
- The deduced amino acid sequence of wheat eIF-4A was compared to orthologs from Arabidopsis thaliana, tobacco, mouse, and Saccharomyces cerevisiae.
- Putative RNA helicase motifs, ATP-binding sites, and ATP hydrolysis sites were identified in the wheat eIF-4A sequence.
Conclusions:
- Wheat eIF-4A shares significant sequence homology with eIF-4A proteins from diverse eukaryotic species.
- The identified conserved motifs suggest a conserved function of eIF-4A in translation initiation across different organisms.
- This study provides a molecular basis for further functional studies of wheat eIF-4A in gene expression regulation.