2a7a: Difference between revisions

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[[Image:2a7a.gif|left|200px]]


<!--
==On the Routine Use of Soft X-Rays in Macromolecular Crystallography, Part III- The Optimal Data Collection Wavelength==
The line below this paragraph, containing "STRUCTURE_2a7a", creates the "Structure Box" on the page.
<StructureSection load='2a7a' size='340' side='right'caption='[[2a7a]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)  
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[2a7a]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Canavalia_cathartica Canavalia cathartica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A7A OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2A7A FirstGlance]. <br>
or leave the SCENE parameter empty for the default display.
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.75&#8491;</td></tr>
-->
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=XE:XENON'>XE</scene></td></tr>
{{STRUCTURE_2a7a| PDB=2a7a |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2a7a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a7a OCA], [https://pdbe.org/2a7a PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2a7a RCSB], [https://www.ebi.ac.uk/pdbsum/2a7a PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2a7a ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CONA_CANCT CONA_CANCT] Glucose/D-mannose specific lectin.
== 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/a7/2a7a_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=2a7a ConSurf].
<div style="clear:both"></div>


'''On the Routine Use of Soft X-Rays in Macromolecular Crystallography, Part III- The Optimal Data Collection Wavelength'''
==See Also==
 
*[[Concanavalin 3D structures|Concanavalin 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
Complete and highly redundant data sets were collected at different wavelengths between 0.80 and 2.65 A for a total of ten different protein and DNA model systems. The magnitude of the anomalous signal-to-noise ratio as assessed by the quotient R(anom)/R(r.i.m.) was found to be influenced by the data-collection wavelength and the nature of the anomalously scattering substructure. By utilizing simple empirical correlations, for instance between the estimated deltaF/F and the expected R(anom) or the data-collection wavelength and the expected R(r.i.m.), the wavelength at which the highest anomalous signal-to-noise ratio can be expected could be estimated even before the experiment. Almost independent of the nature of the anomalously scattering substructure and provided that no elemental X-ray absorption edge is nearby, this optimal wavelength is 2.1 A.
[[Category: Canavalia cathartica]]
 
[[Category: Large Structures]]
==About this Structure==
[[Category: Mueller-Dieckmann C]]
2A7A is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Canavalia_virosa Canavalia virosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A7A OCA].
[[Category: Panjikar S]]
 
[[Category: Tucker PA]]
==Reference==
[[Category: Weiss MS]]
On the routine use of soft X-rays in macromolecular crystallography. Part III. The optimal data-collection wavelength., Mueller-Dieckmann C, Panjikar S, Tucker PA, Weiss MS, Acta Crystallogr D Biol Crystallogr. 2005 Sep;61(Pt 9):1263-72. Epub 2005, Aug 16. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16131760 16131760]
[[Category: Canavalia virosa]]
[[Category: Single protein]]
[[Category: Mueller-Dieckmann, C.]]
[[Category: Panjikar, S.]]
[[Category: Tucker, P A.]]
[[Category: Weiss, M S.]]
[[Category: Lectin]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 18:41:58 2008''

Latest revision as of 09:11, 14 February 2024

On the Routine Use of Soft X-Rays in Macromolecular Crystallography, Part III- The Optimal Data Collection Wavelength

2a7a, resolution 1.75Å

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