Sulfotransferase 2B1b, Sterol Sulfonation, and Disease

Area of Science:

• Biochemistry
• Molecular Biology
• Cellular Biology

Background:

• Human sulfotransferase 2B1b (SULT2B1b) catalyzes the sulfonation of cholesterol and related sterols, producing signaling molecules crucial for cellular functions.
• Sterol sulfonation by SULT2B1b plays a key role in maintaining cholesterol homeostasis, and dysregulation is linked to diseases such as cancer, Alzheimer disease, and X-linked ichthyosis.

Purpose of the Study:

• To integrate the multifaceted processes regulated by SULT2B1b into metabolic maps.
• To elucidate the interdependence of these processes and their coordination by SULT2B1b-mediated oxysterol sulfonation.
• To explore the therapeutic potential of targeting SULT2B1b for disease intervention.

Main Methods:

• Integration of numerous studies into comprehensive metabolic maps.
• Analysis of SULT2B1b's role in disease-relevant molecular pathways.
• Structural analysis of the SULT2B1b sterol-selective allosteric site.

Main Results:

• Metabolic maps highlight the interdependence of SULT2B1b-regulated processes.
• SULT2B1b inhibition is shown to arrest cancer cell growth.
• Novel predictions include suppression of amyloid-beta plaque and tau fibril production, alongside enhanced plaque phagocytosis with SULT2B1b inhibition.

Conclusions:

• SULT2B1b produces sterol-sulfate signaling molecules vital for maintaining homeostasis and preventing pro-disease processes.
• Metabolic maps provide insights into sterol-regulated networks and their coordination by SULT2B1b.
• The structure of the SULT2B1b allosteric site offers a template for developing inhibitors to modulate SULT2B1b activity and associated diseases.