3sxa

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[[Image:3sxa.png|left|200px]]
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==Crystal structure of ABBB+UDP+Gal with Glycerol as the cryoprotectant==
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<StructureSection load='3sxa' size='340' side='right' caption='[[3sxa]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3sxa]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SXA OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3SXA FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=UDP:URIDINE-5-DIPHOSPHATE'>UDP</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3sx3|3sx3]], [[3sx5|3sx5]], [[3sx7|3sx7]], [[3sx8|3sx8]], [[3sxb|3sxb]], [[3sxc|3sxc]], [[3sxd|3sxd]], [[3sxe|3sxe]], [[3sxg|3sxg]]</td></tr>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ABO ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
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<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Fucosylgalactoside_3-alpha-galactosyltransferase Fucosylgalactoside 3-alpha-galactosyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.1.37 2.4.1.37] </span></td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3sxa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sxa OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3sxa RCSB], [http://www.ebi.ac.uk/pdbsum/3sxa PDBsum]</span></td></tr>
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<table>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The human ABO(H) A and B blood group glycosyltransferases GTA and GTB differ by only four amino acids, yet this small dissimilarity is responsible for significant differences in biosynthesis, kinetics and structure. Like other glycosyltransferases, these two enzymes have been shown to recognize substrates through dramatic conformational changes in mobile polypeptide loops surrounding the active site. Structures of GTA, GTB and several chimeras determined by single-crystal X-ray diffraction demonstrate a range of susceptibility to the choice of cryoprotectant, in which the mobile polypeptide loops can be induced by glycerol to form the ordered closed conformation associated with substrate recognition and by MPD [hexylene glycol, (+/-)-2-methyl-2,4-pentanediol] to hinder binding of substrate in the active site owing to chelation of the Mn(2+) cofactor and thereby adopt the disordered open state. Glycerol is often avoided as a cryoprotectant when determining the structures of carbohydrate-active enzymes as it may act as a competitive inhibitor for monosaccharide ligands. Here, it is shown that the use of glycerol as a cryoprotectant can additionally induce significant changes in secondary structure, a phenomenon that could apply to any class of protein.
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Sequence-dependent effects of cryoprotectants on the active sites of the human ABO(H) blood group A and B glycosyltransferases.,Johal AR, Schuman B, Alfaro JA, Borisova S, Seto NO, Evans SV Acta Crystallogr D Biol Crystallogr. 2012 Mar;68(Pt 3):268-76. Epub 2012 Feb 14. PMID:22349229<ref>PMID:22349229</ref>
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The line below this paragraph, containing "STRUCTURE_3sxa", creates the "Structure Box" on the page.
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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{{STRUCTURE_3sxa| PDB=3sxa | SCENE= }}
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===Crystal structure of ABBB+UDP+Gal with Glycerol as the cryoprotectant===
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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</div>
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== References ==
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<references/>
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The line below this paragraph, {{ABSTRACT_PUBMED_22349229}}, adds the Publication Abstract to the page
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__TOC__
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(as it appears on PubMed at http://www.pubmed.gov), where 22349229 is the PubMed ID number.
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</StructureSection>
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{{ABSTRACT_PUBMED_22349229}}
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==About this Structure==
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[[3sxa]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SXA OCA].
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==Reference==
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<ref group="xtra">PMID:022349229</ref><references group="xtra"/>
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[[Category: Fucosylgalactoside 3-alpha-galactosyltransferase]]
[[Category: Fucosylgalactoside 3-alpha-galactosyltransferase]]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]

Revision as of 05:27, 5 June 2014

Crystal structure of ABBB+UDP+Gal with Glycerol as the cryoprotectant

3sxa, resolution 1.50Å

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