1xb6

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[[Image:1xb6.jpg|left|200px]]
 
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==The K24R mutant of Pseudomonas Aeruginosa Azurin==
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The line below this paragraph, containing "STRUCTURE_1xb6", creates the "Structure Box" on the page.
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<StructureSection load='1xb6' size='340' side='right'caption='[[1xb6]], [[Resolution|resolution]] 1.82&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1xb6]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa Pseudomonas aeruginosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XB6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XB6 FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 1.823&#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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{{STRUCTURE_1xb6| PDB=1xb6 | SCENE= }}
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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=1xb6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xb6 OCA], [https://pdbe.org/1xb6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xb6 RCSB], [https://www.ebi.ac.uk/pdbsum/1xb6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xb6 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/AZUR_PSEAE AZUR_PSEAE] Transfers electrons from cytochrome c551 to cytochrome oxidase.
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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/xb/1xb6_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=1xb6 ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Identification and evaluation of factors important for thermostability in proteins is a growing research field with many industrial applications. This study investigates the effects of introducing a novel disulfide bond and engineered electrostatic interactions with respect to the thermostability of holo azurin from Pseudomonas aeruginosa. Four mutants were selected on the basis of rational design and novel temperature-dependent atomic displacement factors from crystal data collected at elevated temperatures. The atomic displacement parameters describe the molecular movement at higher temperatures. The thermostability was evaluated by optical spectroscopy as well as by differential scanning calorimetry. Although azurin has a high inherent stability, the introduction of a novel disulfide bond connecting a flexible loop with small alpha-helix (D62C/K74C copper-containing mutant), increased the T(m) by 3.7 degrees C compared with the holo protein. Furthermore, three mutants were designed to introduce electrostatic interactions, K24R, D23E/K128R, and D23E/K128R/K24R. Mutant K24R stabilizes loops between two separate beta-strands and D23E/K128R was selected to stabilize the C-terminus of azurin. Furthermore, D23E/K128R/K24R was selected to reflect the combination of the electrostatic interactions in D23E/K128R and K24R. The mutants involving electrostatic interactions had a minor effect on the thermostability. The crystal structures of the copper-containing mutants D62C/K74C and K24R have been determined to 1.5 and 1.8 A resolution. In addition the crystal structure of the zinc-loaded mutant D62C/K74C has also been completed to 1.8 A resolution. These structures support the selected design and provide valuable information for evaluating effects of the modifications on the thermostability of holo azurin.
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'''The K24R mutant of Pseudomonas Aeruginosa Azurin'''
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Effects of a novel disulfide bond and engineered electrostatic interactions on the thermostability of azurin.,Tigerstrom A, Schwarz F, Karlsson G, Okvist M, Alvarez-Rua C, Maeder D, Robb FT, Sjolin L Biochemistry. 2004 Oct 5;43(39):12563-74. PMID:15449946<ref>PMID:15449946</ref>
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==Overview==
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Identification and evaluation of factors important for thermostability in proteins is a growing research field with many industrial applications. This study investigates the effects of introducing a novel disulfide bond and engineered electrostatic interactions with respect to the thermostability of holo azurin from Pseudomonas aeruginosa. Four mutants were selected on the basis of rational design and novel temperature-dependent atomic displacement factors from crystal data collected at elevated temperatures. The atomic displacement parameters describe the molecular movement at higher temperatures. The thermostability was evaluated by optical spectroscopy as well as by differential scanning calorimetry. Although azurin has a high inherent stability, the introduction of a novel disulfide bond connecting a flexible loop with small alpha-helix (D62C/K74C copper-containing mutant), increased the T(m) by 3.7 degrees C compared with the holo protein. Furthermore, three mutants were designed to introduce electrostatic interactions, K24R, D23E/K128R, and D23E/K128R/K24R. Mutant K24R stabilizes loops between two separate beta-strands and D23E/K128R was selected to stabilize the C-terminus of azurin. Furthermore, D23E/K128R/K24R was selected to reflect the combination of the electrostatic interactions in D23E/K128R and K24R. The mutants involving electrostatic interactions had a minor effect on the thermostability. The crystal structures of the copper-containing mutants D62C/K74C and K24R have been determined to 1.5 and 1.8 A resolution. In addition the crystal structure of the zinc-loaded mutant D62C/K74C has also been completed to 1.8 A resolution. These structures support the selected design and provide valuable information for evaluating effects of the modifications on the thermostability of holo azurin.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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1XB6 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Pseudomonas_aeruginosa Pseudomonas aeruginosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XB6 OCA].
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</div>
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<div class="pdbe-citations 1xb6" style="background-color:#fffaf0;"></div>
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==Reference==
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==See Also==
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Effects of a novel disulfide bond and engineered electrostatic interactions on the thermostability of azurin., Tigerstrom A, Schwarz F, Karlsson G, Okvist M, Alvarez-Rua C, Maeder D, Robb FT, Sjolin L, Biochemistry. 2004 Oct 5;43(39):12563-74. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15449946 15449946]
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*[[Azurin 3D structures|Azurin 3D structures]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Pseudomonas aeruginosa]]
[[Category: Pseudomonas aeruginosa]]
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[[Category: Single protein]]
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[[Category: Alvarez-Rua C]]
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[[Category: Alvarez-Rua, C.]]
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[[Category: Karlsson G]]
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[[Category: Karlsson, G.]]
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[[Category: Maeder D]]
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[[Category: Maeder, D.]]
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[[Category: Okvist M]]
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[[Category: Okvist, M.]]
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[[Category: Robb FT]]
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[[Category: Robb, F T.]]
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[[Category: Schwarz F]]
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[[Category: Schwarz, F.]]
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[[Category: Sjolin L]]
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[[Category: Sjolin, L.]]
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[[Category: Tigerstrom A]]
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[[Category: Tigerstrom, A.]]
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[[Category: Azurin]]
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[[Category: Electron transport]]
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[[Category: Mutant]]
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[[Category: Thermostability]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 14:48:24 2008''
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Current revision

The K24R mutant of Pseudomonas Aeruginosa Azurin

PDB ID 1xb6

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