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A developmentally regulated bud specific transcript in pea has sequence similarity to seed lectins
1Department of Bioscience and Biotechnology, Drexel University, Philadelphia, Pennsylvania 19104.
Plant Physiology
|March 1, 1989
Summary
A novel gene transcript, pEA207, shows specific expression in actively growing pea buds, unlike mature leaves. This lectin-like protein may function in cell walls of developing plant cells.
Area of Science:
- Plant Molecular Biology
- Gene Expression Analysis
- Legume Biochemistry
Background:
- Organ and stage-specific gene expression is crucial for plant development.
- Lectins are proteins known for their carbohydrate-binding properties and diverse biological roles.
Purpose of the Study:
- To identify and characterize a novel gene transcript (pEA207) with organ-specific expression in pea plants (Pisum sativum L.).
- To investigate the potential function and evolutionary relationships of the pEA207 gene product.
Main Methods:
- cDNA cloning and transcript accumulation analysis.
- Deduced amino acid sequence analysis and homology comparisons.
- Bioinformatic analysis of conserved lectin-binding residues.
Main Results:
- The pEA207 transcript specifically accumulates in actively growing pea buds, with minimal presence in mature leaves.
- The deduced amino acid sequence of pEA207 exhibits significant similarity to known legume lectins, including phytohemagglutinin and pea seed lectin.
- Key residues for metal ion binding, characteristic of lectins, are conserved in the pEA207 sequence.
Conclusions:
- pEA207 represents a striking example of organ- and stage-specific gene expression in pea.
- The pEA207 gene product is likely a sugar-binding lectin-like polypeptide.
- This lectin-like protein is potentially associated with the cell walls of actively growing plant cells.
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