Journal
FEBS LETTERS
Volume 572, Issue 1-3, Pages 46-50Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.febslet.2004.07.016
Keywords
intein; protein splicing; Prp8 protein; fungal pathogen; drug target
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Inteins are self-splicing intervening sequences in proteins, and inteins of pathogenic organisms can be attractive drug targets. Here, we report an intein in important fungal pathogens including Aspergillus fumigatus, Aspergillus nidulans, Histoplasma capsulatum, and different serotypes of Cryptoeoccus neoformans. This intein is inside the extremely conserved and functionally essential Prp8 protein, and it varies in size from 170 aa in C neoformans to 819 aa in A. fumigatus, which is caused by the presence or absence of an endonuclease domain and a putative tongs subdomain in the intein. Prp8 inteins of these organisms were demonstrated to do protein splicing in a recombinant protein in Escherichia coli. These findings revealed Prp8 inteins as attractive targets for potential antifungal drugs to be identified using existing selection and screening methods. (C) 2004 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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