2tsa: Difference between revisions
New page: left|200px<br /><applet load="2tsa" size="450" color="white" frame="true" align="right" spinBox="true" caption="2tsa, resolution 2.2Å" /> '''AZURIN MUTANT M121A''... |
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== | ==AZURIN MUTANT M121A== | ||
The crystal structures of the azurin mutant Met121Ala and its azide | <StructureSection load='2tsa' size='340' side='right'caption='[[2tsa]], [[Resolution|resolution]] 2.20Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2tsa]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_aeruginosus"_(schroeter_1872)_trevisan_1885 "bacillus aeruginosus" (schroeter 1872) trevisan 1885]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1tsa 1tsa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2TSA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2TSA FirstGlance]. <br> | |||
</td></tr><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> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2tsa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2tsa OCA], [https://pdbe.org/2tsa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2tsa RCSB], [https://www.ebi.ac.uk/pdbsum/2tsa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2tsa ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[https://www.uniprot.org/uniprot/AZUR_PSEAE AZUR_PSEAE]] Transfers electrons from cytochrome c551 to cytochrome oxidase. | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ts/2tsa_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</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=2tsa ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The crystal structures of the azurin mutant Met121Ala and its azide derivative Met121Ala-azide from Pseudomonas aeruginosa have been determined. The final crystallographic R values are 21.3 and 19.4% for the two structures, respectively. In the Met121Ala mutant, the distance between the copper ion and His117 increases by 0.34 A compared with the wild-type structure. The removal of the methionine in the apical position induces a shortening of the distance from the copper ion to the carbonyl O atom of Gly45 from 2.97 to 2.74 A. In the Met121Ala-azide structure, the azide anion occupies the cavity created by replacing the Met121 side chain with the smaller methyl group of Ala. The azide anion binds with a terminal N atom to the copper ion at a distance of about 2.04 A. In addition, the copper ion has moved out of the trigonal plane by about 0.26 A towards the azide anion. Thus, the copper site in this structure has a distorted tetrahedral arrangement. The spectroscopic characteristics show, in addition, that the copper sites in the two structures are distinctively different. The Met121Ala mutant still maintains the properties of an ordinary type 1 copper site while the Met121Ala-azide derivative has an absorption maximum at about 409 nm and the copper hyperfine coupling has increased to a value intermediate between those of type 2 copper and the wild-type azurin. | |||
Mutant Met121Ala of Pseudomonas aeruginosa azurin and its azide derivative: crystal structures and spectral properties.,Tsai LC, Bonander N, Harata K, Karlsson G, Vanngard T, Langer V, Sjolin L Acta Crystallogr D Biol Crystallogr. 1996 Sep 1;52(Pt 5):950-8. PMID:15299604<ref>PMID:15299604</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2tsa" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Azurin 3D structures|Azurin 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Bonander, N]] | |||
[[Category: Harata, K]] | |||
[[Category: Karlsson, B G]] | |||
[[Category: Langer, V]] | |||
[[Category: Sjolin, L]] | |||
[[Category: Tsai, L C]] | |||
[[Category: Vanngard, T]] | |||
[[Category: Electron transport]] | |||
