1kdi

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[[Image:1kdi.jpg|left|200px]]<br /><applet load="1kdi" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1kdi, resolution 1.8&Aring;" />
 
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'''REDUCED FORM OF PLASTOCYANIN FROM DRYOPTERIS CRASSIRHIZOMA'''<br />
 
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==Overview==
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==REDUCED FORM OF PLASTOCYANIN FROM DRYOPTERIS CRASSIRHIZOMA==
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Spectroscopic properties, amino acid sequence, electron transfer kinetics, and crystal structures of the oxidized (at 1.7 A resolution) and reduced form (at 1.8 A resolution) of a novel plastocyanin from the fern Dryopteris crassirhizoma are presented. Kinetic studies show that the reduced form of Dryopteris plastocyanin remains redox-active at low pH, under conditions where the oxidation of the reduced form of other plastocyanins is inhibited by the protonation of a solvent-exposed active site residue, His87 (equivalent to His90 in Dryopteris plastocyanin). The x-ray crystal structure analysis of Dryopteris plastocyanin reveals pi-pi stacking between Phe12 and His90, suggesting that the active site is uniquely protected against inactivation. Like higher plant plastocyanins, Dryopteris plastocyanin has an acidic patch, but this patch is located closer to the solvent-exposed active site His residue, and the total number of acidic residues is smaller. In the reactions of Dryopteris plastocyanin with inorganic redox reagents, the acidic patch (the "remote" site) and the hydrophobic patch surrounding His90 (the "adjacent" site) are equally efficient for electron transfer. These results indicate the significance of the lack of protonation at the active site of Dryopteris plastocyanin, the equivalence of the two electron transfer sites in this protein, and a possibility of obtaining a novel insight into the photosynthetic electron transfer system of the first vascular plant fern, including its molecular evolutionary aspects. This is the first report on the characterization of plastocyanin and the first three-dimensional protein structure from fern plant.
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<StructureSection load='1kdi' size='340' side='right'caption='[[1kdi]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1kdi]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Adiantum_capillus-veneris Adiantum capillus-veneris]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KDI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1KDI FirstGlance]. <br>
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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]] 1.8&#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=CU:COPPER+(II)+ION'>CU</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1kdi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kdi OCA], [https://pdbe.org/1kdi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1kdi RCSB], [https://www.ebi.ac.uk/pdbsum/1kdi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1kdi ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PLAS_DRYCA PLAS_DRYCA] Participates in electron transfer between P700 and the cytochrome b6-f complex in photosystem I.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/kd/1kdi_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1kdi ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1KDI is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Eukaryota Eukaryota] with <scene name='pdbligand=CU:'>CU</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KDI OCA].
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*[[Plastocyanin 3D structures|Plastocyanin 3D structures]]
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__TOC__
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==Reference==
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</StructureSection>
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The structure and unusual pH dependence of plastocyanin from the fern Dryopteris crassirhizoma. The protonation of an active site histidine is hindered by pi-pi interactions., Kohzuma T, Inoue T, Yoshizaki F, Sasakawa Y, Onodera K, Nagatomo S, Kitagawa T, Uzawa S, Isobe Y, Sugimura Y, Gotowda M, Kai Y, J Biol Chem. 1999 Apr 23;274(17):11817-23. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=10206999 10206999]
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[[Category: Adiantum capillus-veneris]]
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[[Category: Eukaryota]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Gotowda M]]
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[[Category: Gotowda, M.]]
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[[Category: Hamada K]]
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[[Category: Hamada, K.]]
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[[Category: Inoue T]]
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[[Category: Inoue, T.]]
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[[Category: Kai Y]]
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[[Category: Kai, Y.]]
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[[Category: Kohzuma T]]
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[[Category: Kohzuma, T.]]
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[[Category: Sugimura Y]]
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[[Category: Sugimura, Y.]]
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[[Category: Yoshizaki F]]
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[[Category: Yoshizaki, F.]]
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[[Category: CU]]
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[[Category: electron transfer]]
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[[Category: pai-pai stacking]]
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[[Category: photosystem]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:32:51 2008''
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Current revision

REDUCED FORM OF PLASTOCYANIN FROM DRYOPTERIS CRASSIRHIZOMA

PDB ID 1kdi

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