2v3s
From Proteopedia
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| - | [[Image:2v3s.gif|left|200px]]<br /><applet load="2v3s" size=" | + | [[Image:2v3s.gif|left|200px]]<br /><applet load="2v3s" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="2v3s, resolution 1.70Å" /> | caption="2v3s, resolution 1.70Å" /> | ||
'''STRUCTURAL INSIGHTS INTO THE RECOGNITION OF SUBSTRATES AND ACTIVATORS BY THE OSR1 KINASE'''<br /> | '''STRUCTURAL INSIGHTS INTO THE RECOGNITION OF SUBSTRATES AND ACTIVATORS BY THE OSR1 KINASE'''<br /> | ||
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==Overview== | ==Overview== | ||
The oxidative-stress-responsive kinase 1 (OSR1) and the STE20/SPS1-related, proline/alanine-rich kinase (SPAK) are key enzymes in a signalling cascade, regulating the activity of Na(+)/K(+)/2Cl(-) co-transporters (NKCCs) in, response to osmotic stress. Both kinases have a conserved carboxy-terminal, (CCT) domain, which recognizes a unique peptide (Arg-Phe-Xaa-Val) motif, present in OSR1- and SPAK-activating kinases (with-no-lysine kinase 1, (WNK1) and WNK4) as well as its substrates (NKCC1 and NKCC2). Here, we, describe the structural basis of this recognition event as shown by the, crystal structure of the CCT domain of OSR1 in complex with a peptide, containing this motif, derived from WNK4. The CCT domain forms a novel, protein fold that interacts with the Arg-Phe-Xaa-Val motif through a, surface-exposed groove. An intricate web of interactions is observed, between the CCT domain and an Arg-Phe-Xaa-Val motif-containing peptide, derived from WNK4. Mutational analysis shows that these interactions are, required for the CCT domain to bind to WNK1 and NKCC1. The CCT domain, structure also shows how phosphorylation of a Ser/Thr residue preceding, the Arg-Phe-Xaa-Val motif results in a steric clash, promoting its, dissociation from the CCT domain. These results provide the first, molecular insight into the mechanism by which the SPAK and OSR1 kinases, specifically recognize their upstream activators and downstream, substrates. | The oxidative-stress-responsive kinase 1 (OSR1) and the STE20/SPS1-related, proline/alanine-rich kinase (SPAK) are key enzymes in a signalling cascade, regulating the activity of Na(+)/K(+)/2Cl(-) co-transporters (NKCCs) in, response to osmotic stress. Both kinases have a conserved carboxy-terminal, (CCT) domain, which recognizes a unique peptide (Arg-Phe-Xaa-Val) motif, present in OSR1- and SPAK-activating kinases (with-no-lysine kinase 1, (WNK1) and WNK4) as well as its substrates (NKCC1 and NKCC2). Here, we, describe the structural basis of this recognition event as shown by the, crystal structure of the CCT domain of OSR1 in complex with a peptide, containing this motif, derived from WNK4. The CCT domain forms a novel, protein fold that interacts with the Arg-Phe-Xaa-Val motif through a, surface-exposed groove. An intricate web of interactions is observed, between the CCT domain and an Arg-Phe-Xaa-Val motif-containing peptide, derived from WNK4. Mutational analysis shows that these interactions are, required for the CCT domain to bind to WNK1 and NKCC1. The CCT domain, structure also shows how phosphorylation of a Ser/Thr residue preceding, the Arg-Phe-Xaa-Val motif results in a steric clash, promoting its, dissociation from the CCT domain. These results provide the first, molecular insight into the mechanism by which the SPAK and OSR1 kinases, specifically recognize their upstream activators and downstream, substrates. | ||
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| - | ==Disease== | ||
| - | Known diseases associated with this structure: Pseudohypoaldosteronism type II OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=601844 601844]] | ||
==About this Structure== | ==About this Structure== | ||
| - | 2V3S is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with ACT as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Non-specific_serine/threonine_protein_kinase Non-specific serine/threonine protein kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.11.1 2.7.11.1] Known structural/functional Site: <scene name='pdbsite=AC1:Act Binding Site For Chain B'>AC1</scene>. Full crystallographic information is available from [http:// | + | 2V3S is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=ACT:'>ACT</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Non-specific_serine/threonine_protein_kinase Non-specific serine/threonine protein kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.11.1 2.7.11.1] Known structural/functional Site: <scene name='pdbsite=AC1:Act Binding Site For Chain B'>AC1</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2V3S OCA]. |
==Reference== | ==Reference== | ||
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[[Category: transferase]] | [[Category: transferase]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jan 23 12:58:48 2008'' |
Revision as of 10:58, 23 January 2008
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STRUCTURAL INSIGHTS INTO THE RECOGNITION OF SUBSTRATES AND ACTIVATORS BY THE OSR1 KINASE
Overview
The oxidative-stress-responsive kinase 1 (OSR1) and the STE20/SPS1-related, proline/alanine-rich kinase (SPAK) are key enzymes in a signalling cascade, regulating the activity of Na(+)/K(+)/2Cl(-) co-transporters (NKCCs) in, response to osmotic stress. Both kinases have a conserved carboxy-terminal, (CCT) domain, which recognizes a unique peptide (Arg-Phe-Xaa-Val) motif, present in OSR1- and SPAK-activating kinases (with-no-lysine kinase 1, (WNK1) and WNK4) as well as its substrates (NKCC1 and NKCC2). Here, we, describe the structural basis of this recognition event as shown by the, crystal structure of the CCT domain of OSR1 in complex with a peptide, containing this motif, derived from WNK4. The CCT domain forms a novel, protein fold that interacts with the Arg-Phe-Xaa-Val motif through a, surface-exposed groove. An intricate web of interactions is observed, between the CCT domain and an Arg-Phe-Xaa-Val motif-containing peptide, derived from WNK4. Mutational analysis shows that these interactions are, required for the CCT domain to bind to WNK1 and NKCC1. The CCT domain, structure also shows how phosphorylation of a Ser/Thr residue preceding, the Arg-Phe-Xaa-Val motif results in a steric clash, promoting its, dissociation from the CCT domain. These results provide the first, molecular insight into the mechanism by which the SPAK and OSR1 kinases, specifically recognize their upstream activators and downstream, substrates.
About this Structure
2V3S is a Protein complex structure of sequences from Homo sapiens with as ligand. Active as Non-specific serine/threonine protein kinase, with EC number 2.7.11.1 Known structural/functional Site: . Full crystallographic information is available from OCA.
Reference
Structural insights into the recognition of substrates and activators by the OSR1 kinase., Villa F, Goebel J, Rafiqi FH, Deak M, Thastrup J, Alessi DR, van Aalten DM, EMBO Rep. 2007 Sep;8(9):839-45. Epub 2007 Aug 17. PMID:17721439
Page seeded by OCA on Wed Jan 23 12:58:48 2008
Categories: Homo sapiens | Non-specific serine/threonine protein kinase | Protein complex | Aalten, D.M.F.Van. | Alessi, D.R. | Deak, M. | Goebel, J. | Rafiqi, F.H. | Thastrup, J. | Villa, F. | ACT | Atp-binding | Kinase | Magnesium | Metal-binding | Nucleotide-binding | Phosphorylation | Polymorphism | Serine/threonine-protein kinase | Transferase
