3rgs: Difference between revisions
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==Structural and kinetic analysis of the beef liver catalase with the ammonia as a ligand== | |||
<StructureSection load='3rgs' size='340' side='right'caption='[[3rgs]], [[Resolution|resolution]] 1.99Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3rgs]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RGS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RGS FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.99Å</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>, <scene name='pdbligand=NH3:AMMONIA'>NH3</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=3rgs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rgs OCA], [https://pdbe.org/3rgs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rgs RCSB], [https://www.ebi.ac.uk/pdbsum/3rgs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rgs ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/CATA_BOVIN CATA_BOVIN] Occurs in almost all aerobically respiring organisms and serves to protect cells from the toxic effects of hydrogen peroxide. Promotes growth of cells. | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
We present the structures of bovine catalase in its native form and complexed with ammonia and nitric oxide, obtained by X-ray crystallography. Using the NO generator 1-(N,N-diethylamino)diazen-1-ium-1,2-diolate, we were able to generate sufficiently high NO concentrations within the catalase crystals that substantial occupation was observed despite a high dissociation rate. Nitric oxide seems to be slightly bent from the heme normal that may indicate some iron(II) character in the formally ferric catalase. Microspectrophotometric investigations inline with the synchrotron X-ray beam reveal photoreduction of the central heme iron. In the cases of the native and ammonia-complexed catalase, reduction is accompanied by a relaxation phase. This is likely not the case for the catalase NO complex. The kinetics of binding of NO to catalase were investigated using NO photolyzed from N,N'-bis(carboxymethyl)-N,N'-dinitroso-p-phenylenediamine using an assay that combines catalase with myoglobin binding kinetics. The off rate is 1.5 s(-1). Implications for catalase function are discussed. | |||
Interaction of Nitric Oxide with Catalase: Structural and Kinetic Analysis.,Purwar N, McGarry JM, Kostera J, Pacheco AA, Schmidt M Biochemistry. 2011 May 6. PMID:21524057<ref>PMID:21524057</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 3rgs" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Catalase|Catalase]] | *[[Catalase 3D structures|Catalase 3D structures]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Bos taurus]] | [[Category: Bos taurus]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Purwar | [[Category: Purwar N]] | ||
[[Category: Schmidt | [[Category: Schmidt M]] | ||
Latest revision as of 10:11, 13 August 2026
Structural and kinetic analysis of the beef liver catalase with the ammonia as a ligand
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