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Nuclear localization of a lactic dehydrogenase with single-stranded DNA-binding properties
Experimental Cell Research
|November 1, 1985
Summary
Researchers identified a novel lactic dehydrogenase (LDH-ssb) protein linked to nerve growth factor (NGF)-induced cell cycle arrest. This nuclear protein associates with chromatin, suggesting a role in nuclear functions.
Area of Science:
- Molecular Biology
- Cell Biology
- Neuroscience
Background:
- The 34 kD single-stranded DNA-binding (ssb) protein's synthesis is inhibited during nerve growth factor (NGF)-induced mitotic arrest in PC12 cells.
- This protein was previously identified as lactic dehydrogenase (LDH-ssb protein).
Purpose of the Study:
- To investigate the cellular localization of the LDH-ssb protein.
- To explore the potential nuclear functions of the LDH-ssb protein.
Main Methods:
- Immunolocalization studies using antibodies against the LDH-ssb protein.
- DNase treatment to assess nuclear association.
- Quantitative electron microscopy to determine proximity to chromatin.
Main Results:
- A pool of LDH-ssb protein was found in the nucleus of various cell types.
- Nuclear association of LDH-ssb protein was sensitive to DNase treatment.
- Quantitative electron microscopy confirmed LDH-ssb protein's location near chromatin structures.
Conclusions:
- The LDH-ssb protein is present in the nucleus and associated with chromatin.
- These findings suggest a potential role for LDH-ssb protein in nuclear functions.