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| | <StructureSection load='1xdt' size='340' side='right'caption='[[1xdt]], [[Resolution|resolution]] 2.65Å' scene=''> | | <StructureSection load='1xdt' size='340' side='right'caption='[[1xdt]], [[Resolution|resolution]] 2.65Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1xdt]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_diphtheriae"_kruse_in_flugge_1886 "bacillus diphtheriae" kruse in flugge 1886] and [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XDT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XDT FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1xdt]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Corynebacterium_diphtheriae Corynebacterium diphtheriae] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XDT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1XDT FirstGlance]. <br> |
| - | </td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/NAD(+)--diphthamide_ADP-ribosyltransferase NAD(+)--diphthamide ADP-ribosyltransferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.2.36 2.4.2.36] </span></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]] 2.65Å</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=1xdt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xdt OCA], [https://pdbe.org/1xdt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xdt RCSB], [https://www.ebi.ac.uk/pdbsum/1xdt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xdt 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=1xdt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xdt OCA], [https://pdbe.org/1xdt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1xdt RCSB], [https://www.ebi.ac.uk/pdbsum/1xdt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1xdt ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/DTX_CORBE DTX_CORBE]] Diphtheria toxin, produced by a phage infecting Corynebacterium diphtheriae, is a proenzyme that, after activation, catalyzes the covalent attachment of the ADP ribose moiety of NAD to eukaryotic elongation factor 2 (eEF-2). Fragment A is the catalytic portion responsible for enzymatic ADP-ribosylation of elongation factor 2, while fragment B is responsible for binding of toxin to cell receptors and entry of fragment A.<ref>PMID:18276581</ref> <ref>PMID:19793133</ref> [[https://www.uniprot.org/uniprot/HBEGF_HUMAN HBEGF_HUMAN]] Growth factor that mediates its effects via EGFR, ERBB2 and ERBB4. Required for normal cardiac valve formation and normal heart function. Promotes smooth muscle cell proliferation. May be involved in macrophage-mediated cellular proliferation. It is mitogenic for fibroblasts, but not endothelial cells. It is able to bind EGF receptor/EGFR with higher affinity than EGF itself and is a far more potent mitogen for smooth muscle cells than EGF. Also acts as a diphtheria toxin receptor.
| + | [https://www.uniprot.org/uniprot/DTX_CORBE DTX_CORBE] Diphtheria toxin, produced by a phage infecting Corynebacterium diphtheriae, is a proenzyme that, after activation, catalyzes the covalent attachment of the ADP ribose moiety of NAD to eukaryotic elongation factor 2 (eEF-2). Fragment A is the catalytic portion responsible for enzymatic ADP-ribosylation of elongation factor 2, while fragment B is responsible for binding of toxin to cell receptors and entry of fragment A.<ref>PMID:18276581</ref> <ref>PMID:19793133</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Bacillus diphtheriae kruse in flugge 1886]] | + | [[Category: Corynebacterium diphtheriae]] |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Bowman, M E]] | + | [[Category: Bowman ME]] |
| - | [[Category: Choe, S]] | + | [[Category: Choe S]] |
| - | [[Category: Louie, G V]] | + | [[Category: Louie GV]] |
| - | [[Category: Yang, W]] | + | [[Category: Yang W]] |
| - | [[Category: Diphtheria toxin]]
| + | |
| - | [[Category: Epidermal growth factor]]
| + | |
| - | [[Category: Heparin-binding epidermal growth factor]]
| + | |
| - | [[Category: Receptor]]
| + | |
| Structural highlights
Function
DTX_CORBE Diphtheria toxin, produced by a phage infecting Corynebacterium diphtheriae, is a proenzyme that, after activation, catalyzes the covalent attachment of the ADP ribose moiety of NAD to eukaryotic elongation factor 2 (eEF-2). Fragment A is the catalytic portion responsible for enzymatic ADP-ribosylation of elongation factor 2, while fragment B is responsible for binding of toxin to cell receptors and entry of fragment A.[1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
We describe the crystal structure at 2.65 A resolution of diphtheria toxin (DT) complexed 1:1 with a fragment of its cell-surface receptor, the precursor of heparin-binding epidermal-growth-factor-like growth factor (HBEGF). HBEGF in the complex has the typical EGF-like fold and packs its principal beta hairpin against the face of a beta sheet in the receptor-binding domain of DT. The interface has a predominantly hydrophobic core, and polar interactions are formed at the periphery. The structure of the complex suggests that part of the membrane anchor of the receptor can interact with a hinge region of DT. The toxin molecule is thereby induced to form an open conformation conducive to membrane insertion. The structure provides a basis for altering the binding specificity of the toxin, and may also serve as a model for other EGF-receptor interactions.
Crystal structure of the complex of diphtheria toxin with an extracellular fragment of its receptor.,Louie GV, Yang W, Bowman ME, Choe S Mol Cell. 1997 Dec;1(1):67-78. PMID:9659904[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Jorgensen R, Purdy AE, Fieldhouse RJ, Kimber MS, Bartlett DH, Rod Merrill A. Cholix toxin, a novel ADP-ribosylating factor from vibrio cholerae. J Biol Chem. 2008 Feb 25;. PMID:18276581 doi:M710008200
- ↑ Turgeon Z, White D, Jorgensen R, Visschedyk D, Fieldhouse RJ, Mangroo D, Merrill AR. Yeast as a tool for characterizing mono-ADP-ribosyltransferase toxins. FEMS Microbiol Lett. 2009 Nov;300(1):97-106. Epub 2009 Aug 31. PMID:19793133 doi:10.1111/j.1574-6968.2009.01777.x
- ↑ Louie GV, Yang W, Bowman ME, Choe S. Crystal structure of the complex of diphtheria toxin with an extracellular fragment of its receptor. Mol Cell. 1997 Dec;1(1):67-78. PMID:9659904
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