Figure 3.
The functional relationship of klotho and transient receptor potential vanilloid 5 (TRPV5) in kidneys. The β-glucuronidase activity plays an important role in activating TRPV5. Klotho in urine, as a β-glucuronidase, hydrolyzes the N-linked extracellular sugar residues of TRPV5, and then augments the retention of TRPV5 on the plasma membrane hence increase the influx of Ca2+ in kidneys.