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Article

Pepsin homologues in bacteria

1 Jan 2009

Abstract excerpt

BACKGROUND: Peptidase family A1, to which pepsin belongs, had been assumed to be restricted to eukaryotes. The tertiary structure of pepsin shows two lobes with similar folds and it has been suggested that the gene has arisen from an ancient duplication and fusion event. The only sequence similarity between the lobes is restricted to the motif around the active site aspartate and a hydrophobic-hydrophobic-Gly...

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PMID: 19758436
DOI: 10.1186/1471-2164-10-437

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