Diphtheria toxin
From Proteopedia
(Difference between revisions)
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== Function == | == Function == | ||
| - | '''Diphtheria toxin''' (DT) is a toxin which is secreted by the bacteria causing diphtheria. DT catalyzes the transfer of NAD to a diphthamide residue in the | + | '''Diphtheria toxin''' (DT) is a toxin which is secreted by the bacteria causing diphtheria. DT catalyzes the transfer of NAD to a diphthamide residue in the elongation factor-2 and thus inhibiting protein synthesis.<ref>PMID:20040</ref> |
== Disease == | == Disease == | ||
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== Structural highlights == | == Structural highlights == | ||
| - | DT is proteolitically cleaved into 2 fragments. Fragment A contains the catalytic domain (C) and fragment B contains the transmembrane (T) and receptor-binding (R) domains. DT active site is located in a cleft in the C domain.<ref>PMID:7833807</ref> | + | DT is proteolitically cleaved into 2 fragments. Fragment A contains the catalytic domain (C) and fragment B contains the transmembrane (T) and receptor-binding (R) domains. DT active site is located in a cleft in the C domain.<ref>PMID:7833807</ref> The 2 monomers of DT interact by domain swapping to form a compact, globular dimer structure. |
</StructureSection> | </StructureSection> | ||
Revision as of 12:45, 30 December 2015
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3D structures of diphtheria toxin
Updated on 30-December-2015
References
- ↑ Pappenheimer AM Jr. Diphtheria toxin. Annu Rev Biochem. 1977;46:69-94. PMID:20040 doi:http://dx.doi.org/10.1146/annurev.bi.46.070177.000441
- ↑ Bennett MJ, Choe S, Eisenberg D. Refined structure of dimeric diphtheria toxin at 2.0 A resolution. Protein Sci. 1994 Sep;3(9):1444-63. PMID:7833807
