Estrogen receptor purification by affinity chromatography using an orange triazine dye

Area of Science:

• Biochemistry
• Molecular Biology
• Endocrinology

Background:

• The estrogen receptor is crucial for regulating gene expression.
• Efficient purification of the estrogen receptor is essential for studying its function.
• Existing purification methods can be time-consuming and yield suboptimal results.

Purpose of the Study:

• To develop a rapid and efficient two-step purification procedure for the estrogen receptor.
• To evaluate the effectiveness of dye affinity chromatography using Reactive Orange 14-Sepharose for receptor purification.
• To compare the new method with existing techniques for estrogen receptor purification.

Main Methods:

• A two-step purification process involving ammonium sulfate precipitation and dye affinity chromatography.
• Utilizing Reactive Orange 14 immobilized to Sepharose for affinity chromatography.
• Assessing the binding properties and sedimentation behavior of the purified receptor.

Main Results:

• Achieved a 900- to 1700-fold purification of the estrogen receptor.
• The purified estrogen receptor maintained its estradiol- and DNA-binding capabilities.
• Reactive Orange 14-Sepharose demonstrated superior yield and purity compared to estrogen- or heparin-Sepharose.

Conclusions:

• A rapid and effective two-step purification method for the estrogen receptor has been established.
• Dye affinity chromatography with Reactive Orange 14-Sepharose is a highly efficient technique for estrogen receptor purification.
• This method is also applicable to progesterone receptor purification and offers advantages over existing chromatography techniques.