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Osmosensing by WNK Kinases

Journal Article · · Molecular Biology of the Cell
 [1];  [1];  [1];  [1];  [1];  [2];  [1];  [3];  [1];  [1]
  1. Univ. of Texas Southwestern Medical Center, Dallas, TX (United States)
  2. APS/Illinois Inst. of Technology, Argonne, IL (United States)
  3. Baylor College of Medicine, Houston, TX (United States)
With No Lysine (K) WNK kinases regulate electro-neutral cotransporters that are controlled by osmotic stress and chloride. We showed previously that autophosphorylation of WNK1 is inhibited by chloride, raising the possibility that WNKs are activated by osmotic stress. Here we demonstrate that unphosphorylated WNK isoforms 3 and 1 autophosphorylate in response to osmotic pressure in vitro, applied with the crowding agent polyethylene glycol (PEG)400 or osmolyte ethylene glycol (EG), and that this activation is opposed by chloride. Small angle x-ray scattering of WNK3 in the presence and absence of PEG400, static light scattering in EG, and crystallography of WNK1 were used to understand the mechanism. Osmosensing in WNK3 and WNK1 appears to occur through a conformational equilibrium between an inactive, unphosphorylated, chloride-binding dimer and an autophosphorylation-competent monomer. An improved structure of the inactive kinase domain of WNK1, and a comparison with the structure of a monophosphorylated form of WNK1, suggests that large cavities, greater hydration, and specific bound water may participate in the osmosensing mechanism. Our prior work showed that osmolytes have effects on the structure of phosphorylated WNK1, suggestive of multiple stages of osmotic regulation in WNKs.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
NIH; USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1815032
Journal Information:
Molecular Biology of the Cell, Journal Name: Molecular Biology of the Cell Journal Issue: 18 Vol. 32; ISSN 1059-1524
Publisher:
American Society for Cell BiologyCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

References (61)

The role of conserved water molecules in the catalytic domain of protein kinases journal August 2009
Probing protein hydration and conformational states in solution journal March 1997
The Na-K-Cl cotransport protein of shark rectal gland. II. Regulation by direct phosphorylation. journal December 1992
Analysis of non-ideal behavior in concentrated hemoglobin solutions journal May 1977
Mitogen-activated protein kinases as key players in osmotic stress signaling journal September 2016
WNK Kinase Signaling in Ion Homeostasis and Human Disease journal February 2017
Protein hydration: Investigation of globular protein crystal structures journal June 2017
Evolving SAXS versatility: solution X-ray scattering for macromolecular architecture, functional landscapes, and integrative structural biology journal October 2019
Crystal Structure of the Kinase Domain of WNK1, a Kinase that Causes a Hereditary Form of Hypertension journal July 2004
Crystal Structures of the p21-Activated Kinases PAK4, PAK5, and PAK6 Reveal Catalytic Domain Plasticity of Active Group II PAKs journal February 2007
NKCC1 Chloride Importer Antagonists Attenuate Many Neurological and Psychiatric Disorders journal September 2017
X-ray solution scattering (SAXS) combined with crystallography and computation: defining accurate macromolecular structures, conformations and assemblies in solution journal August 2007
A Phosphorylated Intermediate in the Activation of WNK Kinases journal April 2020
Discovery and Characterization of Allosteric WNK Kinase Inhibitors journal October 2016
Functionally Linked Hydration Changes in Escherichia coli Aspartate Transcarbamylase and Its Catalytic Subunit journal August 1997
Substrate and Docking Interactions in Serine/Threonine Protein Kinases journal November 2007
Database Search Algorithm for Identification of Intact Cross-Links in Proteins and Peptides Using Tandem Mass Spectrometry journal July 2010
Robust Prediction of the MASCOT Score for an Improved Quality Assessment in Mass Spectrometric Proteomics journal September 2008
The inner membrane histidine kinase EnvZ senses osmolality via helix-coil transitions in the cytoplasm: The mechanism of EnvZ osmosensing journal April 2012
Unique chloride-sensing properties of WNK4 permit the distal nephron to modulate potassium homeostasis journal January 2016
Small-molecule WNK inhibition regulates cardiovascular and renal function journal September 2016
WNK kinases, a novel protein kinase subfamily in multi-cellular organisms journal September 2001
SPAK/OSR1 regulate NKCC1 and WNK activity: analysis of WNK isoform interactions and activation by T-loop trans-autophosphorylation journal December 2011
WNK3 modulates transport of Cl- in and out of cells: Implications for control of cell volume and neuronal excitability journal November 2005
Water-mediated conformational preselection mechanism in substrate binding cooperativity to protein kinase A journal March 2018
OSR1 regulates a subset of inward rectifier potassium channels via a binding motif variant journal March 2018
Protein hydration in solution: Experimental observation by x-ray and neutron scattering journal March 1998
[Cl-]i-dependent Phosphorylation of the Na-K-Cl Cotransport Protein of Dog Tracheal Epithelial Cells journal December 1995
Mechanism of Mitogen-activated Protein Kinase Phosphatase-3 Activation by ERK2 journal December 1999
WNK1, a Novel Mammalian Serine/Threonine Protein Kinase Lacking the Catalytic Lysine in Subdomain II journal May 2000
Interactions among HAMP Domain Repeats Act as an Osmosensing Molecular Switch in Group III Hybrid Histidine Kinases from Fungi journal February 2010
Regulation of WNK1 by an Autoinhibitory Domain and Autophosphorylation journal October 2002
Properties of WNK1 and Implications for Other Family Members journal July 2005
Regulation of activity and localization of the WNK1 protein kinase by hyperosmotic stress journal December 2006
Roll: a new algorithm for the detection of protein pockets and cavities with a rolling probe sphere journal October 2009
PRIMUS: a Windows PC-based system for small-angle scattering data analysis journal September 2003
DAMMIF, a program for rapid ab-initio shape determination in small-angle scattering journal January 2009
Determination of the regularization parameter in indirect-transform methods using perceptual criteria journal August 1992
Coot model-building tools for molecular graphics journal November 2004
From crystal to structure with CCP4 journal March 2011
ATSAS 2.8 : a comprehensive data analysis suite for small-angle scattering from macromolecular solutions journal June 2017
BioXTAS RAW : improvements to a free open-source program for small-angle X-ray scattering data reduction and analysis journal September 2017
Amino acid composition and protein dimension journal December 2008
Human Hypertension Caused by Mutations in WNK Kinases journal August 2001
Chloride Sensing by WNK1 Involves Inhibition of Autophosphorylation journal May 2014
Osmosensing by Bacteria journal October 2006
Macromolecular Crowding and Confinement: Biochemical, Biophysical, and Potential Physiological Consequences journal June 2008
Signaling Mechanisms of HAMP Domains in Chemoreceptors and Sensor Kinases journal October 2010
Evolutionarily conserved WNK and Ste20 kinases are essential for acute volume recovery and survival after hypertonic shrinkage in Caenorhabditis elegans journal September 2007
WNKs are potassium-sensitive kinases journal May 2021
In defense of cell volume? journal November 1993
Hypertension: the missing WNKs journal July 2016
Generation of WNK1 knockout cell lines by CRISPR/Cas-mediated genome editing journal February 2015
Sodium-Potassium-Chloride Cotransport journal January 2000
WNK1 Regulates Vasoconstriction and Blood Pressure Response to α 1 -Adrenergic Stimulation in Mice journal September 2011
Dietary Salt Intake Regulates WNK3–SPAK–NKCC1 Phosphorylation Cascade in Mouse Aorta Through Angiotensin II journal November 2013
Inhibition of WNK3 Kinase Signaling Reduces Brain Damage and Accelerates Neurological Recovery After Stroke journal June 2015
WNK pathways in cancer signaling networks journal November 2018
The regulation of salt transport and blood pressure by the WNK-SPAK/OSR1 signalling pathway journal October 2008
HAMP Domain Conformers That Propagate Opposite Signals in Bacterial Chemoreceptors journal February 2013
Osmostress Induces Autophosphorylation of Hog1 via a C-Terminal Regulatory Region That Is Conserved in p38α journal September 2012

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