| 2012 |
KLHL3 is a BTB-BACK-kelch family protein that acts as a substrate adaptor for Cullin3-based ubiquitin ligase complexes and downregulates NCC expression at the cell surface in the distal nephron; loss-of-function mutations in KLHL3 cause familial hyperkalemic hypertension by impairing ion transport. |
Linkage analysis, whole-exome sequencing, direct sequencing, cell surface expression assays |
Nature genetics |
High |
22406640
|
| 2013 |
KLHL3 associates with WNK isoforms (WNK1, WNK4) and CUL3 to form a CUL3-KLHL3 E3 ubiquitin ligase complex that ubiquitylates WNK1 in vitro; disease-causing KLHL3 mutations inhibit binding to WNK1 or CUL3, and disease-causing WNK4 mutations (E562K, Q565E) abolish interaction with KLHL3; siRNA knockdown of CUL3 increases WNK1 protein levels and kinase activity. |
Co-immunoprecipitation, in vitro ubiquitylation assay, siRNA knockdown, domain mapping |
The Biochemical journal |
High |
23387299
|
| 2013 |
KLHL3 interacts with CUL3 and WNK4, induces WNK4 ubiquitination, and reduces WNK4 protein levels; PHAII-causing mutations in either KLHL3 or WNK4 reduce their interaction, decrease WNK4 ubiquitination, and increase WNK4 protein levels leading to hypertension. |
Co-immunoprecipitation, ubiquitination assay, transgenic mice overexpressing WNK4, WNK4 D561A knock-in mouse model |
Cell reports |
High |
23453970
|
| 2013 |
Crystal structure of the KLHL3 BTB-BACK domain dimer in complex with an N-terminal fragment of CUL3 reveals that both BTB and BACK domains contribute to the CUL3 interaction surface; ITC demonstrates that disease mutations in KLHL3 BTB-BACK domains disrupt CUL3 association. |
X-ray crystallography, isothermal titration calorimetry (ITC), mutagenesis |
PloS one |
High |
23573258
|
| 2013 |
Disease-causing KLHL3 mutations in distinct domains impair WNK4 ubiquitination through different mechanisms: BTB domain mutation (E85A) and BACK domain mutation (C164F) decrease CUL3 binding; Kelch domain mutations (S410L, R528H) decrease WNK4 binding; S410L mutation also reduces KLHL3 intracellular stability. |
Co-immunoprecipitation, cycloheximide chase assay, in vitro/in vivo ubiquitination assays, transient transfection in HEK293T cells |
Biochemical and biophysical research communications |
High |
23962426
|
| 2013 |
KLHL3 decreases WNK4 protein abundance and inhibits WNK4-mediated NCC activation in Xenopus oocytes; KLHL3-induced WNK4 ubiquitination and degradation is blocked by dominant-negative Cullin3; five PHAII-causing KLHL3 mutations disrupt WNK4 regulation. |
Xenopus oocyte expression system, ubiquitination assay, dominant-negative Cullin3 construct |
FEBS letters |
High |
23665031
|
| 2014 |
Crystal structure of the KLHL3 Kelch domain in complex with the WNK4 degron motif reveals an intricate web of interactions between conserved residues on the Kelch β-propeller surface and the WNK4 acidic degron; disease-causing mutations in both proteins disrupt critical interface contacts; KLHL2 binds WNK kinases in a similar manner. |
X-ray crystallography, binding assays, mutagenesis |
The Biochemical journal |
High |
24641320
|
| 2014 |
FHHt-causing CUL3 Δ403-459 mutant is more heavily neddylated and activated than WT CUL3, retains ability to bind and ubiquitylate KLHL3, and causes excess degradation of KLHL3, thereby preventing WNK kinase degradation despite increased CUL3-mediated WNK ubiquitylation; nephron-specific Cul3 deletion in mice increases WNK kinase levels and phosphorylated NCC. |
Cell-based ubiquitylation assays, neddylation analysis, nephron-specific Cul3 knockout mouse, western blot |
The Journal of clinical investigation |
High |
25250572
|
| 2014 |
KLHL3 R528H knock-in mice exhibit PHAII phenotypes with increased WNK1 and WNK4 protein levels in kidney; fluorescence correlation spectroscopy confirmed that neither WNK1 nor WNK4 can bind mutant KLHL3 R528H, establishing that impaired KLHL3-CUL3-mediated ubiquitination of both WNK1 and WNK4 causes PHAII. |
KLHL3 R528H knock-in mice, immunoblot, fluorescence correlation spectroscopy with TAMRA-labeled peptides |
Human molecular genetics |
High |
24821705
|
| 2015 |
KLHL3 directly binds claudin-8 and mediates its ubiquitination and degradation; dominant PHAII KLHL3 mutation impairs claudin-8 binding, ubiquitination, and degradation; loss of claudin-8 disrupts paracellular chloride transport in the collecting duct by delocalization of claudin-4 from the tight junction. |
Tissue-specific knockout mouse, Co-immunoprecipitation, ubiquitination assay, KLHL3 knockdown, paracellular permeability assay |
Proceedings of the National Academy of Sciences of the United States of America |
High |
25831548
|
| 2015 |
Akt and PKA phosphorylate KLHL3 at serine 433 in vitro; phosphorylated KLHL3 (S433) shows defective binding to WNK4; PKA stimulation (forskolin) increases S433 phosphorylation and WNK4 protein levels in HEK293 cells; insulin also increases KLHL3 S433 phosphorylation, providing a mechanism for insulin/vasopressin-mediated WNK pathway activation. |
Mass spectrometry, phospho-specific antibody, in vitro kinase assay, Co-immunoprecipitation, cell-based assays with PKA stimulator |
Biochemical and biophysical research communications |
High |
26435498
|
| 2015 |
KLHL3-induced WNK4 degradation involves not only proteasomal but also p62-mediated selective autophagy; KLHL3 forms a complex with both WNK4 and p62 via its kelch repeat domain; WNK4 colocalizes with KLHL3, p62, and LC3 (autophagosome marker) in cytoplasmic puncta. |
Co-immunoprecipitation, proteasome/autophagy inhibitors, p62 overexpression/knockdown, immunofluorescence |
The Biochemical journal |
Medium |
26349538
|
| 2017 |
KLHL3-/- mice show PHAII-like phenotypes with increased WNK1 and WNK4 only in the kidney; KLHL3+/- mice do not exhibit PHAII, demonstrating that KLHL3 haploinsufficiency is insufficient to cause disease; dominant-negative effect of mutant KLHL3 in autosomal dominant PHAII is explained by KLHL3 dimerization. |
KLHL3 knockout mice (LacZ reporter), immunoblot, β-galactosidase staining, dimerization assays |
Molecular and cellular biology |
High |
28052936
|
| 2017 |
WNK4 is indispensable for OSR1/SPAK-NCC phosphorylation cascade; in KLHL3 R528H/R528H mice (extremely elevated WNK1), absence of WNK4 almost completely abolishes SPAK and NCC phosphorylation, demonstrating WNK1 cannot compensate for WNK4 in activating NCC. |
WNK4-/- × KLHL3 R528H knock-in double-mutant mice, immunoblot, immunofluorescence |
Biochemical and biophysical research communications |
High |
28743496
|
| 2018 |
KLHL3 BTB domain mutation (M131V/M78V human equivalent) retains intact WNK binding but reduces CUL3 binding, leading to increased WNK1 and WNK4 abundance and NCC phosphorylation; knock-in mice exhibit PHAII phenotype with decreased cytosolic CUL3 in distal convoluted tubule cells. |
KLHL3 M131V knock-in mice, co-immunoprecipitation, immunoblot, immunogold-labeling electron microscopy, microdissected renal tubules |
FASEB journal |
High |
30148674
|
| 2018 |
Decreased KLHL3 is specifically caused by FHHt-associated mutant CUL3 (Δexon9); CUL3Δex9 knock-in mice show markedly decreased KLHL3 but comparable levels of KLHL2 and other KLHL proteins, confirming that KLHL3 degradation is specific to mutant CUL3. |
CUL3 Δex9 knock-in mice, immunoblot with validated KLHL3 antibody |
Clinical and experimental nephrology |
Medium |
29869755
|
| 2018 |
Renal deletion of CSN subunit Jab1 (deneddylase) increases neddylated CUL3, almost completely depletes KLHL3, and substantially elevates WNK1, WNK4, and SPAK, with increased phosphorylated NCC; demonstrates that COP9 signalosome activity is required to maintain KLHL3 stability and normal WNK signaling. |
Nephron-specific Jab1 (CSN5) knockout mice, western blot, immunofluorescence |
Journal of the American Society of Nephrology |
High |
30301860
|
| 2021 |
The kidney-specific WNK1 isoform (KS-WNK1) is preferentially targeted for degradation by the CUL3-KLHL3 E3 ligase compared to full-length WNK1; the unique 30-amino acid N-terminal fragment of KS-WNK1 is essential for both its activation of NCC and recognition by KLHL3; KLHL3 R528H knock-in mice show specifically increased KS-WNK1. |
KLHL3 R528H knock-in mice, mutagenesis of KS-WNK1, cell-based functional assays, immunoblot |
American journal of physiology. Renal physiology |
High |
33682442
|
| 2022 |
KLHL3 is recruited by viral IRF1 (vIRF1) of KSHV to ubiquitinate and degrade hnRNP Q1 through the ubiquitin-proteasome pathway, thereby destabilizing GDPD1 mRNA and enhancing aerobic glycolysis. |
Co-immunoprecipitation, ubiquitination assay, siRNA knockdown, metabolic assays |
Cell death and differentiation |
Medium |
35538151
|
| 2022 |
Crystal structure of the KLHL3 Kelch domain with WNK3 peptide reveals the complete 11-mer WNK-family degron motif including conserved salt bridge and hydrogen bond interactions; WNK3 Thr541 substitutes the second proline, providing a unique phosphorylatable residue whose phosphorylation abrogates KLHL3 interaction. |
X-ray crystallography, fluorescence polarization, structural modeling |
The Biochemical journal |
High |
35179207
|
| 2022 |
KLHL3 interacts with cMyBP-C by co-immunoprecipitation and mediates its ubiquitination and degradation; homocysteine treatment increases KLHL3 expression and decreases cMyBP-C, which is reversed by proteasome inhibitor MG132. |
Co-immunoprecipitation, immunofluorescence, ubiquitination assay, western blot |
Experimental cell research |
Low |
28315668
|
| 2023 |
A novel C-terminal motif (CM, residues 1051-1075) in WNK4, rich in negatively charged residues, mediates KLHL3-dependent degradation independently of the acidic motif (AM); both AM and CM respond similarly to KLHL3 Kelch domain PHAII mutations, but AM is dominant. |
Co-immunoprecipitation, deletion/mutagenesis constructs, western blot in transfected cells |
Biochemical and biophysical research communications |
Medium |
37285722
|
| 2025 |
Human KLHL3 and all four WNK kinases (WNK1-4) are O-GlcNAcylated; O-GlcNAcylation functionally regulates the KLHL3/WNK pathway and affects WNK4 function in osmolarity control and ferroptosis. |
Biochemical O-GlcNAc enrichment, glycoproteomics/mass spectrometry, cell-based functional assays |
Glycobiology |
Medium |
40796245
|