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10.1042/BJ20051180 http://scihub22266oqcxt.onion/10.1042/BJ20051180 16083423!1237134!16083423     free     free     free Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Biochem+J 2005 ; 391 (Pt 1): 17-24 Nephropedia Template TP {{tp|p=16083423|t=2005. The WNK1 and WNK4 protein kinases that are mutated in Gordon s hypertension syndrome phosphorylate and activate SPAK and OSR1 protein kinases |pdf=|usr=}}{{16083423}} gab.com Text The WNK1 and WNK4 protein kinases that are mutated in Gordon s hypertension syndrome phosphorylate and activate SPAK and OSR1 protein kinases JO: Biochem J http://www.kidney.de/pget.php?&tw=1&pmid=16083423 #FOAvip Mutations in the human genes encoding WNK1 [with no K (lysine) protein kinase-1] and the related protein kinase WNK4 are the cause of Gordon's hypertension syndrome. Little is known about the molecular mechanism by which WNK isoforms regulate cellular processes. We immunoprecipitated WNK1 from extracts of rat testis and found that it was specifically associated with a protein kinase of the STE20 family termed 'STE20/SPS1-related proline/alanine-rich kinase' (SPAK). We demonstrated that WNK1 and WNK4 both interacted with SPAK as well as a closely related kinase, termed 'oxidative stress response kinase-1' (OSR1). Wildtype (wt) but not catalytically inactive WNK1 and WNK4 phosphorylated SPAK and OSR1 to a much greater extent than with other substrates utilized previously, such as myelin basic protein and claudin-4. Phosphorylation by WNK1 or WNK4 markedly increased SPAK and OSR1 activity. Phosphopeptide mapping studies demonstrated that WNK1 phosphorylated kinase-inactive SPAK and OSR1 at an equivalent residue located within the T-loop of the catalytic domain (Thr233 in SPAK, Thr185 in OSR1) and a serine residue located within a C-terminal non-catalytic region (Ser373 in SPAK, Ser325 in OSR1). Mutation of Thr185 to alanine prevented the activation of OSR1 by WNK1, whereas mutation of Thr185 to glutamic acid (to mimic phosphorylation) increased the basal activity of OSR1 over 20-fold and prevented further activation by WNK1. Mutation of Ser325 in OSR1 to alanine or glutamic acid did not affect the basal activity of OSR1 or its ability to be activated by WNK1. These findings suggest that WNK isoforms operate as protein kinases that activate SPAK and OSR1 by phosphorylating the T-loops of these enzymes, resulting in their activation. Our analysis also describes the first facile assay that can be employed to quantitatively assess WNK1 and WNK4 activity. Twit Text FOAVip The WNK1 and WNK4 protein kinases that are mutated in Gordon s hypertension syndrome phosphorylate and activate SPAK and OSR1 protein kinases ????Biochem J http://www.kidney.de/pget.php?&tw=1&pmid=16083423 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=16083423 #FOAvip English Wikipedia <ref>{{Cite pmid|16083423}}</ref> The WNK1 and WNK4 protein kinases that are mutated in Gordon s hypertension syndrome phosphorylate and activate SPAK and OSR1 protein kinases #MMPMID16083423 Vitari AC; Deak M; Morrice NA; Alessi DR Biochem J 2005[Oct]; 391 (Pt 1): 17-24 PMID16083423show ga Mutations in the human genes encoding WNK1 [with no K (lysine) protein kinase-1] and the related protein kinase WNK4 are the cause of Gordon's hypertension syndrome. Little is known about the molecular mechanism by which WNK isoforms regulate cellular processes. We immunoprecipitated WNK1 from extracts of rat testis and found that it was specifically associated with a protein kinase of the STE20 family termed 'STE20/SPS1-related proline/alanine-rich kinase' (SPAK). We demonstrated that WNK1 and WNK4 both interacted with SPAK as well as a closely related kinase, termed 'oxidative stress response kinase-1' (OSR1). Wildtype (wt) but not catalytically inactive WNK1 and WNK4 phosphorylated SPAK and OSR1 to a much greater extent than with other substrates utilized previously, such as myelin basic protein and claudin-4. Phosphorylation by WNK1 or WNK4 markedly increased SPAK and OSR1 activity. Phosphopeptide mapping studies demonstrated that WNK1 phosphorylated kinase-inactive SPAK and OSR1 at an equivalent residue located within the T-loop of the catalytic domain (Thr233 in SPAK, Thr185 in OSR1) and a serine residue located within a C-terminal non-catalytic region (Ser373 in SPAK, Ser325 in OSR1). Mutation of Thr185 to alanine prevented the activation of OSR1 by WNK1, whereas mutation of Thr185 to glutamic acid (to mimic phosphorylation) increased the basal activity of OSR1 over 20-fold and prevented further activation by WNK1. Mutation of Ser325 in OSR1 to alanine or glutamic acid did not affect the basal activity of OSR1 or its ability to be activated by WNK1. These findings suggest that WNK isoforms operate as protein kinases that activate SPAK and OSR1 by phosphorylating the T-loops of these enzymes, resulting in their activation. Our analysis also describes the first facile assay that can be employed to quantitatively assess WNK1 and WNK4 activity. |Amino Acid Sequence[MESH] |Animals[MESH] |Cell Line[MESH] |Enzyme Activation[MESH] |Gene Expression Regulation, Enzymologic/genetics[MESH] |Humans[MESH] |Hyperkalemia/genetics/metabolism[MESH] |Hypertension/*enzymology/genetics/metabolism[MESH] |Male[MESH] |Minor Histocompatibility Antigens[MESH] |Molecular Sequence Data[MESH] |Mutation/*genetics[MESH] |Phosphorylation[MESH] |Protein Kinases/genetics/*metabolism[MESH] |Protein Serine-Threonine Kinases/genetics/*metabolism[MESH] |Rats[MESH] |Sequence Alignment[MESH] |Sequence Homology, Amino Acid[MESH] |Syndrome[MESH] |Testis/enzymology[MESH]The WNK1 and WNK4 protein kinases that are mutated in Gordon s hyperte(epmc).pdf DeepDyve Pubget Overpricing