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Peptidase substrates via global peptide profiling.


ABSTRACT: Peptide metabolism is a complex process that involves many proteins working in concert. Mass spectrometry-based global peptide profiling of mice lacking dipeptidyl peptidase 4 (DPP4) identified endogenous DPP4 substrates and revealed an unrecognized pathway during proline peptide catabolism that interlinks aminopeptidase and DPP4 activities. Together, these studies elucidate specific aspects of DPP4-regulated metabolism and, more generally, highlight the utility of global peptide profiling for studying peptide metabolism in vivo.

SUBMITTER: Tagore DM 

PROVIDER: S-EPMC2730040 | biostudies-literature | 2009 Jan

REPOSITORIES: biostudies-literature

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Peptide metabolism is a complex process that involves many proteins working in concert. Mass spectrometry-based global peptide profiling of mice lacking dipeptidyl peptidase 4 (DPP4) identified endogenous DPP4 substrates and revealed an unrecognized pathway during proline peptide catabolism that interlinks aminopeptidase and DPP4 activities. Together, these studies elucidate specific aspects of DPP4-regulated metabolism and, more generally, highlight the utility of global peptide profiling for s  ...[more]

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