Carbonic anhydrases IV and XV

Area of Science:

• Biochemistry
• Molecular Biology
• Physiology

Background:

• Carbonic anhydrases (CAs) are crucial enzymes for pH and ion homeostasis.
• GPI-anchored CAs, specifically CA IV and CA XV, are membrane-associated and play vital physiological roles.
• Understanding these enzymes is key to membrane-associated CA biology and potential therapeutic targeting.

Purpose of the Study:

• To review current knowledge on the structure, post-translational modifications, and tissue distribution of CAs IV and XV.
• To summarize the physiological roles and inhibition profiles of these two carbonic anhydrase isozymes.
• To compare the distinct characteristics and clinical relevance of CA IV and CA XV.

Main Methods:

• Literature review of existing research on carbonic anhydrases IV and XV.
• Comparative analysis of structural features, functional specializations, and expression patterns.
• Examination of physiological roles and involvement in human diseases.

Main Results:

• CA IV is widely expressed in various tissues and interacts with ion transporters, implicated in kidney, lung, brain, and reproductive functions.
• CA XV exhibits restricted expression in specific kidney nephron segments and is notably absent in humans.
• CA IV is linked to human diseases like retinitis pigmentosa, while CA XV has limited explored clinical relevance.

Conclusions:

• CA IV and CA XV, despite shared structural elements, possess distinct tissue distributions and functional roles.
• CA IV's broad expression and disease association underscore its physiological importance and therapeutic potential.
• Further research into CA XV is limited by its restricted expression and absence in humans, but comparative insights are valuable.