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CATH Superfamily 3.90.175.10

Diphtheria Toxin, domain 1

The name of this superfamily has been modified since the most recent official CATH+ release (v4_4_0). At the point of the last release, this superfamily was named:

"
Diphtheria Toxin, domain 1
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 6: Exotoxin A

There are 1 EC terms in this cluster

Please note: EC annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

Note: The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.

EC Term Annotations Evidence
NAD(+)--diphthamide ADP-ribosyltransferase. [EC: 2.4.2.36]
NAD(+) + diphthamide-[translation elongation factor 2] = nicotinamide + N-(ADP-D-ribosyl)diphthamide-[translation elongation factor 2].
  • Dihtheria toxin and some other bacterial toxins catalyze this reaction, which inactivates translation elongation factor 2 (EF2).
  • The acceptor is diphthamide, a unique modification of a histidine residue in the elongation factor found in archaebacteria and all eukaryotes, but not in eubacteria.
  • Cf. EC 2.4.2.31.
  • The relevant histidine of EF2 is His(715) in mammals, His(699) in yeast and His(600) in Pyrococcus horikoshii.
 2 A0A454LWG3 P11439
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