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| | <StructureSection load='2z6f' size='340' side='right'caption='[[2z6f]], [[Resolution|resolution]] 1.90Å' scene=''> | | <StructureSection load='2z6f' size='340' side='right'caption='[[2z6f]], [[Resolution|resolution]] 1.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2z6f]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Staam Staam]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Z6F OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2Z6F FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2z6f]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Staphylococcus_aureus_subsp._aureus_Mu50 Staphylococcus aureus subsp. aureus Mu50]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Z6F OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2Z6F FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2e7d|2e7d]], [[2ite|2ite]], [[2itf|2itf]], [[2o1a|2o1a]], [[2h3k|2h3k]], [[2o6p|2o6p]]</div></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">isdH ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=158878 STAAM])</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=2z6f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2z6f OCA], [https://pdbe.org/2z6f PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2z6f RCSB], [https://www.ebi.ac.uk/pdbsum/2z6f PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2z6f 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=2z6f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2z6f OCA], [https://pdbe.org/2z6f PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2z6f RCSB], [https://www.ebi.ac.uk/pdbsum/2z6f PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2z6f ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/ISDH_STAAM ISDH_STAAM]] Binds human plasma haptoglobin-hemoglobin complexes, haptoglobin and hemoglobin. Binds haptoglobin-hemoglobin complexes with significantly higher affinity than haptoglobin alone (By similarity).
| + | [https://www.uniprot.org/uniprot/ISDH_STAAM ISDH_STAAM] Binds human plasma haptoglobin-hemoglobin complexes, haptoglobin and hemoglobin. Binds haptoglobin-hemoglobin complexes with significantly higher affinity than haptoglobin alone (By similarity). |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Staam]] | + | [[Category: Staphylococcus aureus subsp. aureus Mu50]] |
| - | [[Category: Suenaga, A]] | + | [[Category: Suenaga A]] |
| - | [[Category: Tanaka, Y]] | + | [[Category: Tanaka Y]] |
| - | [[Category: Tsumoto, K]] | + | [[Category: Tsumoto K]] |
| - | [[Category: Cell wall]]
| + | |
| - | [[Category: Heme binding protein]]
| + | |
| - | [[Category: Igg-like fold]]
| + | |
| - | [[Category: Peptidoglycan-anchor]]
| + | |
| - | [[Category: Secreted]]
| + | |
| Structural highlights
Function
ISDH_STAAM Binds human plasma haptoglobin-hemoglobin complexes, haptoglobin and hemoglobin. Binds haptoglobin-hemoglobin complexes with significantly higher affinity than haptoglobin alone (By similarity).
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 PubMed
To elucidate the heme acquisition system in pathogenic bacteria, we investigated the heme-binding properties of the third NEAT domain of IsdH (IsdH-NEAT3), a receptor for heme located on the surfaces of pathogenic bacterial cells, by using x-ray crystallography, isothermal titration calorimetry, examination of absorbance spectra, mutation analysis, size-exclusion chromatography, and analytical ultracentrifugation. We found the following: 1) IsdH-NEAT3 can bind with multiple heme molecules by two modes; 2) heme was bound at the surface of IsdH-NEAT3; 3) candidate residues proposed from the crystal structure were not essential for binding with heme; and 4) IsdH-NEAT3 was associated into a multimeric heme complex by the addition of excess heme. From these observations, we propose a heme-binding mechanism for IsdH-NEAT3 that involves multimerization and discuss the biological importance of this mechanism.
Structural basis for multimeric heme complexation through a specific protein-heme interaction: the case of the third neat domain of IsdH from Staphylococcus aureus.,Watanabe M, Tanaka Y, Suenaga A, Kuroda M, Yao M, Watanabe N, Arisaka F, Ohta T, Tanaka I, Tsumoto K J Biol Chem. 2008 Oct 17;283(42):28649-59. Epub 2008 Jul 30. PMID:18667422[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Watanabe M, Tanaka Y, Suenaga A, Kuroda M, Yao M, Watanabe N, Arisaka F, Ohta T, Tanaka I, Tsumoto K. Structural basis for multimeric heme complexation through a specific protein-heme interaction: the case of the third neat domain of IsdH from Staphylococcus aureus. J Biol Chem. 2008 Oct 17;283(42):28649-59. Epub 2008 Jul 30. PMID:18667422 doi:10.1074/jbc.M803383200
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