Relationship of promagainin (cas 116357-66-5) to three other prohormones from the skin ofXenopus laevis: A different perspective

Add time:08/02/2019    Source:sciencedirect.com

We observed a striking sequence similarity between precursors for promagainin (cas 116357-66-5) and procaerulein type I (excluding the caerulein peptide region). Additional comparisons of the promagainin precursor with those of other procaeruleins, proxenopsin, and peptide-Gly-Leu-amide revealed that all possess one or more copies of a structurally similar spacer module, from which an amphiphilic spacer peptide is cleaved. Promagainin yields the magainins, spacer peptides with antimicrobial activity; we suggest other spacer peptides may have similar activity. We propose that the genes for the four kinds of hormones were derived from a common ancestral gene through gene and exon duplications and that the procaerulein and proxenopsin genes are mosaic genes in which the original 3′-ends were replaced by exon shuffling.

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