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Published on: July 9, 2013
Stable expression of functional CBP70 lectin during heat shock
C Rousseau1, M Felin, A P Sève
1INSERM U-496, Institut Universitaire d'Hématologie, Hôpital Saint-Louis, 75475 Paris Cedex 10, France.
Journal of Cellular Biochemistry
|April 20, 2000
Summary
The heat-stable lectin CBP70 (carbohydrate-binding protein 70) remains active in HL60 cells after heat shock. Its N-acetylglucosamine-binding sites persist, suggesting a role in cellular organization.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- CBP70 is a glycosylated lectin involved in glycan-lectin and protein-protein interactions.
- Its cellular partners, such as galectin-3 and Bcl-2, vary with localization.
- Lectins play crucial roles in cellular recognition and signaling pathways.
Purpose of the Study:
- To investigate the stability and functional integrity of CBP70 under heat stress conditions.
- To determine if CBP70 retains its N-acetylglucosamine-binding activity after heat shock.
- To explore the potential role of CBP70 in cellular organization and complex formation.
Main Methods:
- Biochemical assays
- Fluorocytometry
- Confocal microscopy
- Affinity chromatography
- Heat shock treatments (mild and harsh conditions)
Main Results:
- CBP70 demonstrated persistence in HL60 cells following both mild and harsh heat shock treatments.
- The N-acetylglucosamine-binding sites of CBP70 remained active post-heat shock.
- Combined analyses confirmed the stability and functional activity of CBP70 under stress.
Conclusions:
- CBP70 is a heat-stable lectin with persistent functional activity.
- The findings support the hypothesis that CBP70 acts as an organizer of multimeric protein assemblies.
- CBP70 may contribute to cellular adaptability and complex formation in response to environmental changes.
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