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RFP is a DNA binding protein associated with the nuclear matrix
T Isomura1, K Tamiya-Koizumi, M Suzuki
1Department of Pathology, Nagoya University School of Medicine, Japan.
Nucleic Acids Research
|October 25, 1992
Summary
The RFP protein, identified as a 58 kDa nuclear matrix-associated factor, exhibits DNA-binding activity. This suggests a role for RFP in nuclear matrix molecular processes.
Area of Science:
- Molecular Biology
- Cell Biology
- Oncogenesis
Background:
- The RFP gene encodes a protein with zinc finger domains implicated in ret proto-oncogene activation.
- Further characterization of the RFP protein is necessary to understand its function.
Purpose of the Study:
- To develop a polyclonal antibody against the RFP protein.
- To investigate the cellular localization and DNA-binding properties of the RFP protein.
Main Methods:
- Polyclonal antibody production against RFP cDNA fragment expressed in E. coli.
- Western blot analysis of cell lysates and mouse testis.
- Nuclear matrix association studies using AH7974 and Raji cells.
- DNA-binding assays of solubilized nuclear matrix proteins.
Main Results:
- RFP was identified as a 58 kDa protein in various human and rodent cell lines, and mouse testis.
- A unique 68 kDa protein was detected specifically in mouse testis.
- RFP demonstrated strong association with the nuclear matrix in tested cell lines.
- Solubilized RFP from the nuclear matrix exhibited DNA-binding activity, with a preference for double-stranded DNA.
Conclusions:
- The RFP protein is a nuclear matrix-associated factor with DNA-binding capabilities.
- RFP likely plays a role in molecular processes occurring within the nuclear matrix.
- These findings provide insights into the functional significance of RFP in cellular mechanisms.