1obu

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[[Image:1obu.gif|left|200px]]<br /><applet load="1obu" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1obu, resolution 2.00&Aring;" />
 
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'''APOCRUSTACYANIN C1 CRYSTALS GROWN IN SPACE AND EARTH USING VAPOUR DIFFUSION GEOMETRY'''<br />
 
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==Overview==
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==Apocrustacyanin C1 crystals grown in space and earth using vapour diffusion geometry==
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Models of apocrustacyanin C(1) were refined against X-ray data recorded on Bending Magnet 14 at the ESRF to resolutions of 1.85 and 2 A from a space-grown and an earth-grown crystal, respectively, both using vapour-diffusion crystal-growth geometry. The space crystals were grown in the APCF on the NASA Space Shuttle. The microgravity crystal growth showed a cyclic nature attributed to Marangoni convection, thus reducing the benefits of the microgravity environment, as reported previously [Chayen et al. (1996), Q. Rev. Biophys. 29, 227-278]. A subsequent mosaicity evaluation, also reported previously, showed only a partial improvement in the space-grown crystals over the earth-grown crystals [Snell et al. (1997), Acta Cryst. D53, 231-239], contrary to the case for lysozyme crystals grown in space with liquid-liquid diffusion, i.e. without any major motion during growth [Snell et al. (1995), Acta Cryst. D52, 1099-1102]. In this paper, apocrustacyanin C(1) electron-density maps from the two refined models are now compared. It is concluded that the electron-density maps of the protein and the bound waters are found to be better overall for the structures of apocrustacyanin C(1) studied from the space-grown crystal compared with those from the earth-grown crystal, even though both crystals were grown using vapour-diffusion crystal-growth geometry. The improved residues are on the surface of the protein, with two involved in or nearby crystal lattice-forming interactions, thus linking an improved crystal-growth mechanism to the molecular level. The structural comparison procedures developed should themselves be valuable for evaluating crystal-growth procedures in the future.
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<StructureSection load='1obu' size='340' side='right'caption='[[1obu]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1obu]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homarus_gammarus Homarus gammarus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OBU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1OBU FirstGlance]. <br>
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1OBU is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homarus_gammarus Homarus gammarus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OBU OCA].
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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]] 2&#8491;</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=1obu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1obu OCA], [https://pdbe.org/1obu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1obu RCSB], [https://www.ebi.ac.uk/pdbsum/1obu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1obu ProSAT]</span></td></tr>
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==Reference==
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</table>
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Apocrustacyanin C(1) crystals grown in space and on earth using vapour-diffusion geometry: protein structure refinements and electron-density map comparisons., Habash J, Boggon TJ, Raftery J, Chayen NE, Zagalsky PF, Helliwell JR, Acta Crystallogr D Biol Crystallogr. 2003 Jul;59(Pt 7):1117-23. Epub 2003, Jun 27. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12832753 12832753]
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== Function ==
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[https://www.uniprot.org/uniprot/CRC1_HOMGA CRC1_HOMGA] Binds the carotenoid astaxanthin (AXT) which provides the blue coloration to the carapace of the lobster.
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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/ob/1obu_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=1obu ConSurf].
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
[[Category: Homarus gammarus]]
[[Category: Homarus gammarus]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Boggon, T J.]]
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[[Category: Boggon TJ]]
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[[Category: Chayen, N E.]]
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[[Category: Chayen NE]]
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[[Category: Habash, J.]]
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[[Category: Habash J]]
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[[Category: Helliwell, J R.]]
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[[Category: Helliwell JR]]
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[[Category: Raftery, J.]]
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[[Category: Raftery J]]
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[[Category: Zagalsky, P F.]]
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[[Category: Zagalsky PF]]
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[[Category: antiparallel beta-strands]]
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[[Category: lipocalin]]
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[[Category: pigment]]
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[[Category: transport protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:15:50 2008''
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Current revision

Apocrustacyanin C1 crystals grown in space and earth using vapour diffusion geometry

PDB ID 1obu

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