Related Experiment Videos
[A0-phenylalanyl] relaxin (porcine): an active intermediate
Biochemical and Biophysical Research Communications
|January 16, 1985
Summary
A novel form of porcine relaxin, phenylalanyl relaxin, was identified as a byproduct. This variant is biologically and structurally similar to standard relaxin, suggesting an incomplete prorelaxin conversion.
Area of Science:
- Biochemistry
- Endocrinology
- Protein Chemistry
Background:
- Porcine relaxin is a hormone with significant physiological roles.
- Large-scale preparations of relaxin can yield unexpected byproducts.
- Understanding relaxin variants is crucial for its therapeutic and research applications.
Purpose of the Study:
- To isolate and characterize a newly identified byproduct from porcine relaxin preparations.
- To determine the structural and functional properties of this relaxin variant.
- To investigate the potential source of its formation during relaxin processing.
Main Methods:
- Ion exchange chromatography on CM-cellulose.
- High-performance liquid chromatography on reversed-phase columns.
- Amino acid and sequence analyses of the isolated A-chain.
- Circular dichroism spectroscopy.
- Mouse pubic ligament bioassay.
- Radioimmunoassay.
Main Results:
- A phenylalanyl relaxin variant was successfully isolated.
- Structural analysis confirmed an N-terminal elongation of the A-chain.
- Phenylalanyl relaxin exhibited indistinguishable properties from standard B29 relaxin via spectroscopy and bioassays.
- The variant showed no difference in radioimmunoassay detection.
Conclusions:
- The isolated byproduct is a phenylalanyl-extended form of relaxin.
- This variant is functionally and structurally equivalent to native porcine relaxin.
- Its presence likely results from incomplete post-translational processing of prorelaxin.