Poststatin, a new inhibitor of prolyl endopeptidase, produced by Streptomyces viridochromogenes MH534-30F3. I. Taxonomy, production, isolation, physico-chemical properties and biological activities.
Poststatin, a new inhibitor of prolyl endopeptidase (PEP) was discovered in the fermentation broth of Streptomyces viridochromogenes MH534-30F3. It was purified by Diaion HP-20, Sephadex LH-20 and YMC-gel (ODS-A) column chromatography and then isolated as a colorless powder. Poststatin has the molecular formula C26H47N5O7. The IC50 value of poststatin against the PEP of partially purified porcine kidney was 0.03 microgram/ml. It has low acute toxicity. No deaths occured after iv injection of 250 mg/kg of this agent to mice.
Aoyagi
T
T
Institute of Microbial Chemistry, Tokyo, Japan.
Nagai
M
M
Ogawa
K
K
Kojima
F
F
Okada
M
M
Ikeda
T
T
Hamada
M
M
Takeuchi
T
T
D000595:Amino Acid Sequence; D000818:Animals; D002402:Cathepsin D / Q000037:antagonists & inhibitors; D055598:Chemical Phenomena; D002621:Chemistry; D010450:Endopeptidases / Q000378:metabolism*; D051379:Mice; D008969:Molecular Sequence Data; D009842:Oligopeptides / Q000302:isolation & purification* / Q000494:pharmacology; D000085822:Prolyl Oligopeptidases; D012697:Serine Endopeptidases; D015842:Serine Proteinase Inhibitors / Q000302:isolation & purification* / Q000494:pharmacology; D013302:Streptomyces / Q000737:chemistry*
D009842:Oligopeptides; D015842:Serine Proteinase Inhibitors; C071400:poststatin; D010450:Endopeptidases; D012697:Serine Endopeptidases; D000085822:Prolyl Oligopeptidases; D002402:Cathepsin D