Shiga-like toxin, subunit A (IPR016331)

Short name: Shiga-like_toxin_subunit_A

Overlapping homologous superfamilies

Family relationships


This entry represents subunit A of Shiga-like toxin also known as rRNA N-glycosidase; EC:, which are responsible for inactivation of the ribosome. Shiga-like toxins are produced by Shigella dysenteriae and by bacteriophage that infect Escherichia coli cells [PMID: 10994531]. These toxins contain a single A subunit that has N-glycosidase activity and multiple copies of the B subunit that binds to the membrane glycolipid, globotriaosylceramide (Gb3). The A subunit is responsible for inhibiting protein synthesis through the catalytic inactivation of 60S ribosomal subunits. It catalyses the endohydrolysis of the N-glycosidic bond at one specific adenosine on the 28S rRNA.

GO terms

Biological Process

GO:0017148 negative regulation of translation

Molecular Function

GO:0030598 rRNA N-glycosylase activity

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.