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Intracellular functions of galectins.
Fu-Tong Liu1, Ronald J Patterson, John L Wang
1Department of Dermatology, University of California, Davis, School of Medicine, 4860 Y Street, Suite 3400, Sacramento, CA 95817, USA.
Biochimica Et Biophysica Acta
|September 12, 2002
Summary
This review explores intracellular galectin functions, revealing roles in pre-mRNA splicing, cell growth, apoptosis, and cell cycle regulation. These findings highlight galectins as key intracellular regulators.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Galectins are a family of proteins with diverse cellular localizations, including intracellular and extracellular.
- While extracellular roles are known, intracellular functions are increasingly recognized.
- Understanding intracellular galectin activities is crucial for comprehending cellular processes.
Purpose of the Study:
- To summarize the known intracellular activities of various galectin family members.
- To discuss the potential molecular mechanisms underlying these intracellular functions.
- To highlight the significance of galectins in regulating fundamental cellular processes.
Main Methods:
- Literature review of studies investigating galectin localization and function.
- Analysis of experimental data demonstrating galectin involvement in cellular pathways.
- Identification of interacting intracellular proteins and signaling cascades.
Main Results:
- Galectin-1 and Galectin-3 function as redundant pre-mRNA splicing factors.
- Galectin-3, Galectin-7, and Galectin-12 modulate cell growth and apoptosis (both pro- and anti-apoptotic roles).
- Galectin-3 and Galectin-12 are involved in cell cycle regulation, with partially elucidated intracellular mechanisms.
Conclusions:
- Galectins play significant, multifaceted roles within the cell.
- Intracellular galectin functions are linked to critical cellular processes like gene expression, growth, and death.
- Further research into galectin-ligand interactions will illuminate their precise intracellular mechanisms.