1zm3
From Proteopedia
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|PDB= 1zm3 |SIZE=350|CAPTION= <scene name='initialview01'>1zm3</scene>, resolution 3.07Å | |PDB= 1zm3 |SIZE=350|CAPTION= <scene name='initialview01'>1zm3</scene>, resolution 3.07Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=DDE:{3-[4-(2-AMINO-2-CARBOXY-ETHYL)-1H-IMIDAZOL-2-YL]-1-CARBAMOYL-PROPYL}-TRIMETHYL-AMMONIUM'>DDE</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/NAD(+)--diphthamide_ADP-ribosyltransferase NAD(+)--diphthamide ADP-ribosyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.2.36 2.4.2.36] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/NAD(+)--diphthamide_ADP-ribosyltransferase NAD(+)--diphthamide ADP-ribosyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.2.36 2.4.2.36] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1n0u|1N0U]], [[1aer|1AER]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1zm3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zm3 OCA], [http://www.ebi.ac.uk/pdbsum/1zm3 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1zm3 RCSB]</span> | ||
}} | }} | ||
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[[Category: toxin]] | [[Category: toxin]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 01:38:33 2008'' |
Revision as of 22:38, 30 March 2008
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| , resolution 3.07Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Activity: | NAD(+)--diphthamide ADP-ribosyltransferase, with EC number 2.4.2.36 | ||||||
| Related: | 1N0U, 1AER
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Structure of the apo eEF2-ETA complex
Overview
The bacteria causing diphtheria, whooping cough, cholera and other diseases secrete mono-ADP-ribosylating toxins that modify intracellular proteins. Here, we describe four structures of a catalytically active complex between a fragment of Pseudomonas aeruginosa exotoxin A (ETA) and its protein substrate, translation elongation factor 2 (eEF2). The target residue in eEF2, diphthamide (a modified histidine), spans across a cleft and faces the two phosphates and a ribose of the non-hydrolysable NAD+ analogue, betaTAD. This suggests that the diphthamide is involved in triggering NAD+ cleavage and interacting with the proposed oxacarbenium intermediate during the nucleophilic substitution reaction, explaining the requirement of diphthamide for ADP ribosylation. Diphtheria toxin may recognize eEF2 in a manner similar to ETA. Notably, the toxin-bound betaTAD phosphates mimic the phosphate backbone of two nucleotides in a conformational switch of 18S rRNA, thereby achieving universal recognition of eEF2 by ETA.
About this Structure
1ZM3 is a Protein complex structure of sequences from Pseudomonas aeruginosa and Saccharomyces cerevisiae. Full crystallographic information is available from OCA.
Reference
Exotoxin A-eEF2 complex structure indicates ADP ribosylation by ribosome mimicry., Jorgensen R, Merrill AR, Yates SP, Marquez VE, Schwan AL, Boesen T, Andersen GR, Nature. 2005 Aug 18;436(7053):979-84. PMID:16107839
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