Related Experiment Videos
Wheat acetyl-coenzyme A carboxylase: cDNA and protein structure
P Gornicki1, J Podkowinski, L A Scappino
1Department of Molecular Genetics and Cell Biology, University of Chicago, IL 60637.
Summary
Researchers cloned wheat acetyl-CoA carboxylase (ACC) cDNA, revealing a 251-kDa protein. This study details the conserved biotin carboxylase domain and its implications for plant ACC research.
Area of Science:
- Molecular Biology
- Plant Biochemistry
Background:
- Wheat acetyl-CoA carboxylase (ACC) is a crucial enzyme in fatty acid biosynthesis.
- Understanding plant ACC structure and function is vital for agricultural applications.
Purpose of the Study:
- To clone and characterize the cDNA encoding wheat (Triticum aestivum) acetyl-CoA carboxylase (ACC).
- To analyze the deduced amino acid sequence and identify conserved domains.
Main Methods:
- Polymerase Chain Reaction (PCR) was used to amplify cDNA fragments.
- Overlapping clones were isolated using PCR fragments as probes.
- Northern and Southern blot analyses were performed to study mRNA and DNA.
Main Results:
- A full-length wheat ACC cDNA sequence was obtained, encoding a 251-kDa polypeptide.
- The highly conserved biotin carboxylase domain showed 52-55% identity to prokaryotic, yeast, rat, and diatom ACCs.
- Wheat ACC possesses a eukaryotic biotin attachment site (EVMKM) and lacks a chloroplast targeting sequence.
Conclusions:
- The cloned wheat ACC cDNA provides a foundation for further functional studies.
- Significant conservation of ACC across plant species was observed, suggesting shared functional mechanisms.
- The findings contribute to understanding fatty acid metabolism in plants.