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Comparative analysis of the substrate preferences of two post-proline cleaving endopeptidases, prolyl oligopeptidase and fibroblast activation protein ?.


ABSTRACT: Post-proline cleaving peptidases are promising therapeutic targets for neurodegenerative diseases, psychiatric conditions, metabolic disorders, and many cancers. Prolyl oligopeptidase (POP; E.C. 3.4.21.26) and fibroblast activation protein ? (FAP; E.C. 3.4.24.B28) are two post-proline cleaving endopeptidases with very similar substrate specificities. Both enzymes are implicated in numerous human diseases, but their study is impeded by the lack of specific substrate probes. We interrogated a combinatorial library of proteolytic substrates and identified novel and selective substrates of POP and FAP. These new sequences will be useful as probes for fundamental biochemical study, scaffolds for inhibitor design, and triggers for controlled drug delivery.

SUBMITTER: Jambunathan K 

PROVIDER: S-EPMC3500622 | biostudies-literature | 2012 Jul

REPOSITORIES: biostudies-literature

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Comparative analysis of the substrate preferences of two post-proline cleaving endopeptidases, prolyl oligopeptidase and fibroblast activation protein α.

Jambunathan Kalyani K   Watson Douglas S DS   Endsley Aaron N AN   Kodukula Krishna K   Galande Amit K AK  

FEBS letters 20120627 16


Post-proline cleaving peptidases are promising therapeutic targets for neurodegenerative diseases, psychiatric conditions, metabolic disorders, and many cancers. Prolyl oligopeptidase (POP; E.C. 3.4.21.26) and fibroblast activation protein α (FAP; E.C. 3.4.24.B28) are two post-proline cleaving endopeptidases with very similar substrate specificities. Both enzymes are implicated in numerous human diseases, but their study is impeded by the lack of specific substrate probes. We interrogated a comb  ...[more]

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