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Lily cofactor-independent phosphoglycerate mutase: purification, partial sequencing, and immunolocalization
J L Wang1, L L Walling, G Y Jauh
1Department of Botany and Plant Sciences, University of California, Riverside 92521-0124, USA.
Planta
|January 1, 1996
Summary
Cofactor-independent phosphoglycerate mutase (PGAM-i) was isolated from lily tissues. This enzyme, found in various cellular locations, suggests multiple functions within the plant cell.
Area of Science:
- Plant biochemistry
- Enzymology
- Molecular biology
Background:
- Cofactor-independent phosphoglycerate mutase (PGAM-i) is an enzyme crucial for glycolysis.
- Previous studies identified PGAM-i in various organisms, but its presence and function in monocots like lilies were less understood.
Purpose of the Study:
- To isolate and characterize PGAM-i from Lilium longiflorum (lily).
- To determine the cellular localization and potential multiple functions of lily PGAM-i.
Main Methods:
- Enzyme isolation and purification from lily tissues.
- Two-dimensional polyacrylamide gel electrophoresis (2D PAGE) for protein separation.
- Antibody production and immunodetection (immunoblots, immunoelectron microscopy, immunogold labeling).
- Partial protein and DNA sequencing for homology analysis.
Main Results:
- Three distinct PGAM-i forms were resolved using 2D PAGE.
- PGAM-i was detected in all examined lily tissues (roots, styles, leaves, anthers).
- The enzyme was localized in the cytoplasm, plastids, and nucleus of root cells, indicating diverse cellular roles.
Conclusions:
- Lily PGAM-i is present across multiple tissues and cellular compartments.
- The enzyme's presence in the nucleus, cytosol, and plastids suggests multifaceted functions beyond glycolysis.
- Further research is warranted to elucidate the specific roles of PGAM-i in different cellular locations within the lily plant.