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| | ==Solution NMR structure of CaM bound to iNOS CaM binding domain peptide== | | ==Solution NMR structure of CaM bound to iNOS CaM binding domain peptide== |
| - | <StructureSection load='2ll6' size='340' side='right' caption='[[2ll6]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='2ll6' size='340' side='right'caption='[[2ll6]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2ll6]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LL6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2LL6 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2ll6]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LL6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2LL6 FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2ll7|2ll7]]</td></tr> | + | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2ll7|2ll7]]</div></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CALM1, CALM, CAM, CAM1, CALM2, CAM2, CAMB, CALM3, CALML2, CAM3, CAMC, CAMIII ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), NOS2, NOS2A ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CALM1, CALM, CAM, CAM1, CALM2, CAM2, CAMB, CALM3, CALML2, CAM3, CAMC, CAMIII ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), NOS2, NOS2A ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Nitric-oxide_synthase_(NADPH_dependent) Nitric-oxide synthase (NADPH dependent)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.13.39 1.14.13.39] </span></td></tr> | + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Nitric-oxide_synthase_(NADPH_dependent) Nitric-oxide synthase (NADPH dependent)], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.13.39 1.14.13.39] </span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ll6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ll6 OCA], [http://pdbe.org/2ll6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2ll6 RCSB], [http://www.ebi.ac.uk/pdbsum/2ll6 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2ll6 ProSAT]</span></td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ll6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ll6 OCA], [https://pdbe.org/2ll6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ll6 RCSB], [https://www.ebi.ac.uk/pdbsum/2ll6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ll6 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/NOS2_HUMAN NOS2_HUMAN]] Produces nitric oxide (NO) which is a messenger molecule with diverse functions throughout the body. In macrophages, NO mediates tumoricidal and bactericidal actions. Also has nitrosylase activity and mediates cysteine S-nitrosylation of cytoplasmic target proteins such COX2. | + | [[https://www.uniprot.org/uniprot/NOS2_HUMAN NOS2_HUMAN]] Produces nitric oxide (NO) which is a messenger molecule with diverse functions throughout the body. In macrophages, NO mediates tumoricidal and bactericidal actions. Also has nitrosylase activity and mediates cysteine S-nitrosylation of cytoplasmic target proteins such COX2. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | ==See Also== | | ==See Also== |
| - | *[[Calmodulin|Calmodulin]] | + | *[[Calmodulin 3D structures|Calmodulin 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Human]] | | [[Category: Human]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Dieckmann, T]] | | [[Category: Dieckmann, T]] |
| | [[Category: Futrega, K]] | | [[Category: Futrega, K]] |
| Structural highlights
2ll6 is a 2 chain structure with sequence from Human. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Related: | |
| Gene: | CALM1, CALM, CAM, CAM1, CALM2, CAM2, CAMB, CALM3, CALML2, CAM3, CAMC, CAMIII (HUMAN), NOS2, NOS2A (HUMAN) |
| Activity: | Nitric-oxide synthase (NADPH dependent), with EC number 1.14.13.39 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[NOS2_HUMAN] Produces nitric oxide (NO) which is a messenger molecule with diverse functions throughout the body. In macrophages, NO mediates tumoricidal and bactericidal actions. Also has nitrosylase activity and mediates cysteine S-nitrosylation of cytoplasmic target proteins such COX2.
Publication Abstract from PubMed
Nitric oxide synthase (NOS) plays a major role in a number of key physiological and pathological processes. Knowledge of how this is regulated is important. The small acidic calcium binding protein, calmodulin (CaM), is required to fully activate the enzyme. The exact mechanism of how CaM activates NOS is not fully understood. Studies have shown CaM to act like a switch that causes a conformational change in NOS to allow for the transfer of an electron between the reductase and oxygenase domains through a process that is thought to be highly dynamic. To investigate the dynamic properties of CaM-NOS interactions, we determined the solution structure of CaM bound to the inducible NOS (iNOS) and endothelial NOS (eNOS) CaM binding region peptides. In addition, we investigated the effect of CaM phosphorylation. Tyrosine 99 (Y99) of CaM is reported to be phosphorylated in vivo. We have produced a phosphomimetic Y99E CaM to investigate the structural and functional effects that the phosphorylation of this residue may have on nitric oxide production. All three mammalian NOS isoforms were included in the investigation. Our results show that a phosphomimetic Y99E CaM significantly reduces the maximal synthase activity of eNOS by 40% while having little effect on nNOS or iNOS activity. A comparative nuclear magnetic resonance study between phosphomimetic Y99E CaM and wild-type CaM bound to the eNOS CaM binding region peptide was performed. This investigation provides important insights into how the increased electronegativity of a phosphorylated CaM protein affects the binding, dynamics, and activation of the NOS enzymes.
Structure and Dynamics of Calmodulin (CaM) Bound to Nitric Oxide Synthase Peptides: Effects of a Phosphomimetic CaM Mutation.,Piazza M, Futrega K, Spratt DE, Dieckmann T, Guillemette JG Biochemistry. 2012 May 1;51(17):3651-61. Epub 2012 Apr 16. PMID:22486744[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Piazza M, Futrega K, Spratt DE, Dieckmann T, Guillemette JG. Structure and Dynamics of Calmodulin (CaM) Bound to Nitric Oxide Synthase Peptides: Effects of a Phosphomimetic CaM Mutation. Biochemistry. 2012 May 1;51(17):3651-61. Epub 2012 Apr 16. PMID:22486744 doi:10.1021/bi300327z
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