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Isolation and characterization of a functional A-type cyclin from maize
1University of Maryland, Department of Plant Biology, College Park 20742, USA.
Plant Molecular Biology
|June 10, 1998
Summary
Researchers identified a novel maize cyclin gene, cycZm2w, crucial for cell cycle regulation. This gene complements a yeast mutant, indicating its conserved function in plant cell proliferation, particularly in root apex meristems.
Area of Science:
- Molecular Biology
- Plant Science
- Cell Biology
Background:
- Cyclins are essential regulators of eukaryotic cell cycle progression.
- Plant cyclins play critical roles in growth and development.
- Understanding plant cyclin function is key to deciphering cell division control.
Purpose of the Study:
- To isolate and characterize a novel cyclin gene from maize (Zea mays).
- To investigate the functional role of the isolated maize cyclin in cell cycle regulation.
- To determine the expression pattern of the maize cyclin gene in different plant tissues.
Main Methods:
- Isolation of a cyclin cDNA clone (cycZm2w) from maize root tip cells.
- Sequence analysis to identify conserved cyclin domains.
- Functional complementation studies using a cyclin-deficient budding yeast mutant (BF305-15d#21).
- Expression analysis in various maize organs.
Main Results:
- A maize cyclin cDNA clone, cycZm2w, was isolated and classified into plant cyclin group A2.
- The encoded protein contains a cyclin box domain characteristic of mitotic cyclins.
- cycZm2w successfully rescued the growth defect of the yeast cyclin-deficient mutant.
- Expression of cycZm2w was detected in meristematic tissues, with high prominence in the root apex.
Conclusions:
- cycZm2w represents a functional plant cyclin involved in cell cycle regulation.
- Its conserved function suggests a role in meristematic activity and proliferation, particularly in maize root development.
- This finding contributes to the understanding of plant cell division control mechanisms.