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Recombinant expression and characterization of dentin matrix protein 1
R Srinivasan1, B Chen, J P Gorski
1Department of Oral Biology, College of Dentistry, Chicago, IL 60612, USA.
Connective Tissue Research
|April 11, 2000
Summary
Researchers produced recombinant Dentin matrix protein 1 (DMP1) in E. coli to study its role in bone and tooth mineralization. A specific antibody was also developed, confirming DMP1
Area of Science:
- Biochemistry
- Biomaterials Science
- Mineralized Tissue Biology
Background:
- Dentin matrix protein 1 (DMP1) is an extracellular matrix noncollagenous protein (NCP) found in calcified tissues.
- DMP1's acidic domains suggest a role in regulating matrix mineralization.
- Difficulty in isolating sufficient DMP1 from mineralized tissues has hindered functional studies.
Purpose of the Study:
- To produce milligram quantities of unmodified recombinant DMP1 apoprotein for functional studies.
- To generate a specific polyclonal antibody against recombinant DMP1.
- To enable investigation of DMP1's physiological role in mineralized tissue formation.
Main Methods:
- Recombinant DMP1 was produced using E. coli expression system.
- Unmodified apoprotein was prepared for functional assays.
- Polyclonal antibody was generated against the recombinant DMP1 antigen.
Main Results:
- Milligram quantities of recombinant DMP1 apoprotein were successfully produced.
- A specific polyclonal antibody against DMP1 was generated.
- The antibody showed no cross-reactivity with other dentin NCPs or bone acidic glycoprotein-75 (BAG-75).
Conclusions:
- The production of recombinant DMP1 and its specific antibody overcomes previous isolation challenges.
- The generated antibody is a valuable tool for determining the in vivo function of DMP1.
- This work facilitates future research into DMP1's role in regulating mineralization.