title: Isolation and biological activities of signal transduction inhibitors from microorganisms and plants.
abstract: Microorganisms and plants are treasuries of secondary metabolites having unique structures and biological activities. We have isolated inhibitors of cellular signal transduction from them. Phosphatidylinositol turnover inhibitors include inostamycin, piericidins and echiguanines. Erbstatin and lavendustin A were isolated as tyrosine kinase inhibitors, and dephostatin was isolated as a tyrosine phosphatase inhibitor. Recently, we have isolated a new vinca alkaloid having anti-ras activity. These signal transduction inhibitors will be useful for mechanistic studies and suppression of cancer.
authors.affiliation: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Umezawa
mesh_terms: D019870:1-Phosphatidylinositol 4-Kinase; D051607:CDP-Diacylglycerol-Inositol 3-Phosphatidyltransferase; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D005658:Fungi / Q000737:chemistry*; D015394:Molecular Structure; D019869:Phosphatidylinositol 3-Kinases; D010716:Phosphatidylinositols / Q000378:metabolism; D017853:Phosphotransferases (Alcohol Group Acceptor) / Q000037:antagonists & inhibitors / Q000378:metabolism; D010944:Plants / Q000737:chemistry*; D017027:Protein Tyrosine Phosphatases / Q000037:antagonists & inhibitors / Q000378:metabolism; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects*; D013302:Streptomyces / Q000737:chemistry*; D017855:Transferases (Other Substituted Phosphate Groups) / Q000037:antagonists & inhibitors; D018631:ras Proteins / Q000037:antagonists & inhibitors
chemical_list: D004791:Enzyme Inhibitors; D010716:Phosphatidylinositols; D019869:Phosphatidylinositol 3-Kinases; D017853:Phosphotransferases (Alcohol Group Acceptor); D019870:1-Phosphatidylinositol 4-Kinase; D011505:Protein-Tyrosine Kinases; D017855:Transferases (Other Substituted Phosphate Groups); D051607:CDP-Diacylglycerol-Inositol 3-Phosphatidyltransferase; D017027:Protein Tyrosine Phosphatases; D018631:ras Proteins