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  • Title: Characterization of a new ribotoxin gene (c-sar) from Aspergillus clavatus.
    Author: Huang KC, Hwang YY, Hwu L, Lin A.
    Journal: Toxicon; 1997 Mar; 35(3):383-92. PubMed ID: 9080594.
    Abstract:
    A new ribotoxin, c-sarcin, was isolated from a culture of Aspergillus clavatus. A full-length genomic DNA (c-sar) coding for c-sarcin was cloned and sequenced. The deduced amino acid sequence showed a high homology to restrictocin and alpha-sarcin. The native toxin as well as the recombinant protein hydrolysed ribosomes and naked RNA. The genomic structure of the c-sar gene had an intron located between the coding sequences for secretory signal peptide and the mature protein. The intron contained a stretch of 38 adenines. The intron sequence of c-sar was different from that of restrictocin but resembled that of alpha-sarcin. There was 34% identity between the intron of c-sarcin and alpha-sarcin, and this similarity was further increased to 83% if the stretch of polyadenine was omitted.
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