Prolylendopeptidase inhibitory activity of a glial fibrillary acidic protein fragment and other proline-rich peptides.
The brain prolylendopeptidase (PEP) inhibitory activity of synthetic peptides related to the bovine brain-derived PEP inhibitor, GFAP-(38-55) (MPPPLPARVDFSLAGALN), was investigated. Homologous peptides such as MPPPLPTRVDFSLAGALN (human type) and MTPPLPARVDFSLAGALN (mouse type) also inhibited PEP. Among various synthetic fragments of GFAP-(38-55), only MPPPLP had a Ki essentially the same as that of GFAP-(38-55). Similar synthetic proline-rich peptides such as synapsin fragments and SH3 domain-binding peptides had more or less inhibitory activity.
Maruyama
S
S
National Institute of Bioscience and Human-Technology, Agency of Industrial Science and Technology, Japan.
Ohmori
T
T
Nakagami
T
T
D000595:Amino Acid Sequence; D000818:Animals; D001921:Brain / Q000201:enzymology; D002417:Cattle; D005904:Glial Fibrillary Acidic Protein / Q000138:chemical synthesis / Q000494:pharmacology*; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000138:chemical synthesis / Q000494:pharmacology*; D011392:Proline / Q000494:pharmacology*; D000085822:Prolyl Oligopeptidases; D012697:Serine Endopeptidases / Q000378:metabolism*; D015842:Serine Proteinase Inhibitors / Q000494:pharmacology*
D005904:Glial Fibrillary Acidic Protein; D010446:Peptide Fragments; D015842:Serine Proteinase Inhibitors; D011392:Proline; D012697:Serine Endopeptidases; C000705287:PREPL protein, human; D000085822:Prolyl Oligopeptidases