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Structure and thiazide inhibition mechanism of the human Na–Cl cotransporter
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Structure and thiazide inhibition mechanism of the human Na–Cl cotransporter
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Journal Article
Structure and thiazide inhibition mechanism of the human Na–Cl cotransporter
2023
Overview
The sodium–chloride cotransporter (NCC) is critical for kidney physiology
1
. The NCC has a major role in salt reabsorption in the distal convoluted tubule of the nephron
2
,
3
, and mutations in the NCC cause the salt-wasting disease Gitelman syndrome
4
. As a key player in salt handling, the NCC regulates blood pressure and is the target of thiazide diuretics, which have been widely prescribed as first-line medications to treat hypertension for more than 60 years
5
–
7
. Here we determined the structures of human NCC alone and in complex with a commonly used thiazide diuretic using cryo-electron microscopy. These structures, together with functional studies, reveal major conformational states of the NCC and an intriguing regulatory mechanism. They also illuminate how thiazide diuretics specifically interact with the NCC and inhibit its transport function. Our results provide critical insights for understanding the Na–Cl cotransport mechanism of the NCC, and they establish a framework for future drug design and for interpreting disease-related mutations.
Using cryo-electron microscopy, the structures of human Na–Cl cotransporter are determined alone and in complex with a thiazide diuretic.
Publisher
Nature Publishing Group UK,Nature Publishing Group
