2dds: Difference between revisions
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==Crystal structure of sphingomyelinase from Bacillus cereus with cobalt ion== | ==Crystal structure of sphingomyelinase from Bacillus cereus with cobalt ion== | ||
<StructureSection load='2dds' size='340' side='right' caption='[[2dds]], [[Resolution|resolution]] 1.80Å' scene=''> | <StructureSection load='2dds' size='340' side='right' caption='[[2dds]], [[Resolution|resolution]] 1.80Å' scene=''> | ||
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2ddr|2ddr]], [[2ddt|2ddt]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2ddr|2ddr]], [[2ddt|2ddt]]</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Sphingomyelin_phosphodiesterase Sphingomyelin phosphodiesterase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.4.12 3.1.4.12] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Sphingomyelin_phosphodiesterase Sphingomyelin phosphodiesterase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.4.12 3.1.4.12] </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=2dds FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dds OCA], [http://pdbe.org/2dds PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2dds RCSB], [http://www.ebi.ac.uk/pdbsum/2dds PDBsum], [http://www.topsan.org/Proteins/RSGI/2dds TOPSAN]</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=2dds FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dds OCA], [http://pdbe.org/2dds PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2dds RCSB], [http://www.ebi.ac.uk/pdbsum/2dds PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2dds ProSAT], [http://www.topsan.org/Proteins/RSGI/2dds TOPSAN]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dd/2dds_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dd/2dds_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
Revision as of 09:12, 30 May 2018
Crystal structure of sphingomyelinase from Bacillus cereus with cobalt ionCrystal structure of sphingomyelinase from Bacillus cereus with cobalt ion
Structural highlights
Function[PHL2_BACCE] Required, with sphingomyelinase, to effect target cell lysis (hemolysis). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedSphingomyelinase (SMase) from Bacillus cereus (Bc-SMase) hydrolyzes sphingomyelin to phosphocholine and ceramide in a divalent metal ion-dependent manner. Bc-SMase is a homologue of mammalian neutral SMase (nSMase) and mimics the actions of the endogenous mammalian nSMase in causing differentiation, development, aging, and apoptosis. Thus Bc-SMase may be a good model for the poorly characterized mammalian nSMase. The metal ion activation of sphingomyelinase activity of Bc-SMase was in the order Co2+ > or = Mn2+ > or = Mg2+ >> Ca2+ > or = Sr2+. The first crystal structures of Bc-SMase bound to Co2+, Mg2+, or Ca2+ were determined. The water-bridged double divalent metal ions at the center of the cleft in both the Co2+- and Mg2+-bound forms were concluded to be the catalytic architecture required for sphingomyelinase activity. In contrast, the architecture of Ca2+ binding at the site showed only one binding site. A further single metal-binding site exists at one side edge of the cleft. Based on the highly conserved nature of the residues of the binding sites, the crystal structure of Bc-SMase with bound Mg2+ or Co2+ may provide a common structural framework applicable to phosphohydrolases belonging to the DNase I-like folding superfamily. In addition, the structural features and site-directed mutagenesis suggest that the specific beta-hairpin with the aromatic amino acid residues participates in binding to the membrane-bound sphingomyelin substrate. Structural basis of the sphingomyelin phosphodiesterase activity in neutral sphingomyelinase from Bacillus cereus.,Ago H, Oda M, Takahashi M, Tsuge H, Ochi S, Katunuma N, Miyano M, Sakurai J J Biol Chem. 2006 Jun 9;281(23):16157-67. Epub 2006 Apr 4. PMID:16595670[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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