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7zos

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[7zos]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Beta_vulgaris Beta vulgaris]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7ZOS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7ZOS FirstGlance]. <br>
<table><tr><td colspan='2'>[[7zos]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Beta_vulgaris Beta vulgaris]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7ZOS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7ZOS FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CYN:CYANIDE+ION'>CYN</scene>, <scene name='pdbligand=FC6:HEXACYANOFERRATE(3-)'>FC6</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CYN:CYANIDE+ION'>CYN</scene>, <scene name='pdbligand=FC6:HEXACYANOFERRATE(3-)'>FC6</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></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=7zos FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7zos OCA], [https://pdbe.org/7zos PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7zos RCSB], [https://www.ebi.ac.uk/pdbsum/7zos PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7zos 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=7zos FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7zos OCA], [https://pdbe.org/7zos PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7zos RCSB], [https://www.ebi.ac.uk/pdbsum/7zos PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7zos ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[[https://www.uniprot.org/uniprot/V5QR23_BETVV V5QR23_BETVV]]
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[https://www.uniprot.org/uniprot/V5QR23_BETVV V5QR23_BETVV]
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Phytoglobins (Pgbs) are plant-originating heme proteins of the globin superfamily with varying degrees of hexacoordination. Pgbs have a conserved cysteine residue, the role of which is poorly understood. In this paper, we investigated the functional and structural role of cysteine in BvPgb1.2, a Class 1 Pgb from sugar beet (Beta vulgaris), by constructing an alanine-substituted mutant (Cys86Ala). The substitution had little impact on structure, dimerization, and heme loss as determined by X-ray crystallography, size-exclusion chromatography, and an apomyoglobin-based heme-loss assay, respectively. The substitution significantly affected other important biochemical properties. The autoxidation rate increased 16.7- and 14.4-fold for the mutant versus the native protein at 25 degrees C and 37 degrees C, respectively. Thermal stability similarly increased for the mutant by ~2.5 degrees C as measured by nano-differential scanning fluorimetry. Monitoring peroxidase activity over 7 days showed a 60% activity decrease in the native protein, from 33.7 to 20.2 U/mg protein. When comparing the two proteins, the mutant displayed a remarkable enzymatic stability as activity remained relatively constant throughout, albeit at a lower level, ~12 U/mg protein. This suggests that cysteine plays an important role in BvPgb1.2 function and stability, despite having seemingly little effect on its tertiary and quaternary structure.
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Oxidative Implications of Substituting a Conserved Cysteine Residue in Sugar Beet Phytoglobin BvPgb 1.2.,Christensen S, Groth L, Leiva-Eriksson N, Nyblom M, Bulow L Antioxidants (Basel). 2022 Aug 20;11(8). pii: antiox11081615. doi:, 10.3390/antiox11081615. PMID:36009334<ref>PMID:36009334</ref>
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==See Also==
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*[[Hemoglobin 3D structures|Hemoglobin 3D structures]]
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 7zos" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>

Current revision

Class 1 Phytoglobin from Sugar beet (BvPgb1.2)

PDB ID 7zos

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