PhomopsinAisaanacidic13-memberedcyclichexapeptide-likemetabolitewiththreeunusualaminoacidslinkedinanansamacrocyclewithatripeptidetail,terminatinginadicarboxylicacid.PhomopsinAisapotentmycotoxinproducedbythefungus,Phomopsisleptostromiformis,andcauseslupinosisinlivestockfedinfectedlupins.PhomopsinAisanimportantbioprobeforunderstandingcellularstructuralproteins.
PhomopsinAissolubleinethanol,methanol,DMForDMSO.Limitedwatersolubility.
CASNumber
64925-80-0
MolecularFormula
C36H45ClN6O12
MolecularWeight
789.2
MechanismofAction
PhomopsinAbindsselectivelytodimerictubulinatasiteoverlappingthatofvinblastineandmaytansine,inhibitingtheformationofthemicrotubulespindletoblockcelldivision.Uniquely,phomopsinAprotectstubulinfromdecay.
StorageConditions
-20°C