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| | <StructureSection load='3aib' size='340' side='right'caption='[[3aib]], [[Resolution|resolution]] 3.09Å' scene=''> | | <StructureSection load='3aib' size='340' side='right'caption='[[3aib]], [[Resolution|resolution]] 3.09Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3aib]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_25175 Atcc 25175]. The June 2011 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Glucansucrase'' by David Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2011_6 10.2210/rcsb_pdb/mom_2011_6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AIB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3AIB FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3aib]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_mutans Streptococcus mutans]. The June 2011 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Glucansucrase'' by David Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2011_6 10.2210/rcsb_pdb/mom_2011_6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AIB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3AIB FirstGlance]. <br> |
| - | </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=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.09Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3aic|3aic]], [[3aie|3aie]]</div></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=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene>, <scene name='pdbligand=PRD_900001:alpha-maltose'>PRD_900001</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">gtfC, SMU_1005 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1309 ATCC 25175])</td></tr>
| + | |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Dextransucrase Dextransucrase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.1.5 2.4.1.5] </span></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=3aib FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3aib OCA], [https://pdbe.org/3aib PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3aib RCSB], [https://www.ebi.ac.uk/pdbsum/3aib PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3aib ProSAT]</span></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=3aib FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3aib OCA], [https://pdbe.org/3aib PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3aib RCSB], [https://www.ebi.ac.uk/pdbsum/3aib PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3aib ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/GTFC_STRMU GTFC_STRMU]] Production of extracellular glucans, that are thought to play a key role in the development of the dental plaque because of their ability to adhere to smooth surfaces and mediate the aggregation of bacterial cells and food debris.
| + | [https://www.uniprot.org/uniprot/GTFC_STRMU GTFC_STRMU] Production of extracellular glucans, that are thought to play a key role in the development of the dental plaque because of their ability to adhere to smooth surfaces and mediate the aggregation of bacterial cells and food debris. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Atcc 25175]] | |
| - | [[Category: Dextransucrase]] | |
| | [[Category: Glucansucrase]] | | [[Category: Glucansucrase]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| | [[Category: RCSB PDB Molecule of the Month]] | | [[Category: RCSB PDB Molecule of the Month]] |
| - | [[Category: Ito, K]] | + | [[Category: Streptococcus mutans]] |
| - | [[Category: Ito, S]] | + | [[Category: Ito K]] |
| - | [[Category: Iwata, S]] | + | [[Category: Ito S]] |
| - | [[Category: Shimamura, T]] | + | [[Category: Iwata S]] |
| - | [[Category: Beta-alpha-barrel]] | + | [[Category: Shimamura T]] |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
GTFC_STRMU Production of extracellular glucans, that are thought to play a key role in the development of the dental plaque because of their ability to adhere to smooth surfaces and mediate the aggregation of bacterial cells and food debris.
Publication Abstract from PubMed
Glucansucrase (GSase) from Streptococcus mutans is an essential agent in dental caries pathogenesis. Here, we report the crystal structure of S. mutans glycosyltransferase (GTF-SI), which synthesizes soluble and insoluble glucans and is a glycoside hydrolase (GH) family 70 GSase in the free enzyme form and in complex with acarbose and maltose. Resolution of the GTF-SI structure confirmed that the domain order of GTF-SI is circularly permuted as compared to that of GH family 13 alpha-amylases. As a result, domains A, B and IV of GTF-SI are each composed of two separate polypeptide chains. Structural comparison of GTF-SI and amylosucrase, which is closely related to GH family 13 amylases, indicated that the two enzymes share a similar transglycosylation mechanism via a glycosyl-enzyme intermediate in subsite -1. On the other hand, novel structural features were revealed in subsites +1 and +2 of GTF-SI. Trp517 provided the platform for glycosyl acceptor binding, while Tyr430, Asn481 and Ser589, which are conserved in family 70 enzymes but not in family 13 enzymes, comprised subsite +1. Based on the structure of GTF-SI and amino acid comparison of GTF-SI, GTF-I and GTF-S, Asp593 in GTF-SI appeared to be the most critical point for acceptor sugar orientation, influencing the transglycosylation specificity of GSases, that is, whether they produced insoluble glucan with alpha(1-3) glycosidic linkages or soluble glucan with alpha(1-6) linkages. The structural information derived from the current study should be extremely useful in the design of novel inhibitors that prevent the biofilm formation by GTF-SI.
Crystal Structure of Glucansucrase from the Dental Caries Pathogen Streptococcus mutans.,Ito K, Ito S, Shimamura T, Weyand S, Kawarasaki Y, Misaka T, Abe K, Kobayashi T, Cameron AD, Iwata S J Mol Biol. 2011 Feb 25. PMID:21354427[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Ito K, Ito S, Shimamura T, Weyand S, Kawarasaki Y, Misaka T, Abe K, Kobayashi T, Cameron AD, Iwata S. Crystal Structure of Glucansucrase from the Dental Caries Pathogen Streptococcus mutans. J Mol Biol. 2011 Feb 25. PMID:21354427 doi:10.1016/j.jmb.2011.02.028
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