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| | <StructureSection load='1o9i' size='340' side='right'caption='[[1o9i]], [[Resolution|resolution]] 1.33Å' scene=''> | | <StructureSection load='1o9i' size='340' side='right'caption='[[1o9i]], [[Resolution|resolution]] 1.33Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1o9i]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/"lactobacillus_arabinosus"_fred_et_al. "lactobacillus arabinosus" fred et al.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1O9I OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1O9I FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1o9i]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Lactiplantibacillus_plantarum Lactiplantibacillus plantarum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1O9I OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1O9I FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene>, <scene name='pdbligand=MN3:MANGANESE+(III)+ION'>MN3</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=O:OXYGEN+ATOM'>O</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]] 1.33Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1jku|1jku]], [[1jkv|1jkv]]</div></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene>, <scene name='pdbligand=MN3:MANGANESE+(III)+ION'>MN3</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=O:OXYGEN+ATOM'>O</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Catalase Catalase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.11.1.6 1.11.1.6] </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=1o9i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o9i OCA], [https://pdbe.org/1o9i PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1o9i RCSB], [https://www.ebi.ac.uk/pdbsum/1o9i PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1o9i 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=1o9i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o9i OCA], [https://pdbe.org/1o9i PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1o9i RCSB], [https://www.ebi.ac.uk/pdbsum/1o9i PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1o9i ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/MCAT_LACPN MCAT_LACPN] |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Lactobacillus arabinosus fred et al]] | + | [[Category: Lactiplantibacillus plantarum]] |
| - | [[Category: Catalase]]
| + | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Barynin, V V]] | + | [[Category: Barynin VV]] |
| - | [[Category: Whittaker, J W]] | + | [[Category: Whittaker JW]] |
| - | [[Category: Whittaker, M M]] | + | [[Category: Whittaker MM]] |
| - | [[Category: Dimanganese catalase]]
| + | |
| - | [[Category: Hexamer]]
| + | |
| - | [[Category: Metalloenzyme]]
| + | |
| - | [[Category: Oxidoreductase]]
| + | |
| - | [[Category: Preoxidase]]
| + | |
| Structural highlights
1o9i is a 6 chain structure with sequence from Lactiplantibacillus plantarum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Method: | X-ray diffraction, Resolution 1.33Å |
| Ligands: | , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
MCAT_LACPN
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
X-ray crystallography of the nonheme manganese catalase from Lactobacillus plantarum (LPC) [Barynin, V.V., Whittaker, M.M., Antonyuk, S.V., Lamzin, V.S., Harrison, P.M., Artymiuk, P.J. & Whittaker, J.W. (2001) Structure9, 725-738] has revealed the structure of the dimanganese redox cluster together with its protein environment. The oxidized [Mn(III)Mn(III)] cluster is bridged by two solvent molecules (oxo and hydroxo, respectively) together with a micro 1,3 bridging glutamate carboxylate and is embedded in a web of hydrogen bonds involving an outer sphere tyrosine residue (Tyr42). A novel homologous expression system has been developed for production of active recombinant LPC and Tyr42 has been replaced by phenylalanine using site-directed mutagenesis. Spectroscopic and structural studies indicate that disruption of the hydrogen-bonded web significantly perturbs the active site in Y42F LPC, breaking one of the solvent bridges and generating an 'open' form of the dimanganese cluster. Two of the metal ligands adopt alternate conformations in the crystal structure, both conformers having a broken solvent bridge in the dimanganese core. The oxidized Y42F LPC exhibits strong optical absorption characteristic of high spin Mn(III) in low symmetry and lower coordination number. MCD and EPR measurements provide complementary information defining a ferromagnetically coupled electronic ground state for a cluster containing a single solvent bridge, in contrast to the diamagnetic ground state found for the native cluster containing a pair of solvent bridges. Y42F LPC has less than 5% of the catalase activity and much higher Km for H2O2 ( approximately 1.4 m) at neutral pH than WT LPC, although the activity is slightly restored at high pH where the cluster is converted to a diamagnetic form. These studies provide new insight into the contribution of the outer sphere tyrosine to the stability of the dimanganese cluster and the role of the solvent bridges in catalysis by dimanganese catalases.
Outer sphere mutagenesis of Lactobacillus plantarum manganese catalase disrupts the cluster core. Mechanistic implications.,Whittaker MM, Barynin VV, Igarashi T, Whittaker JW Eur J Biochem. 2003 Mar;270(6):1102-16. PMID:12631270[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Whittaker MM, Barynin VV, Igarashi T, Whittaker JW. Outer sphere mutagenesis of Lactobacillus plantarum manganese catalase disrupts the cluster core. Mechanistic implications. Eur J Biochem. 2003 Mar;270(6):1102-16. PMID:12631270
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