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Developmental regulation of a stalk cell differentiation-inducing factor in Dictyostelium discoideum

机译:盘基网柄菌中茎细胞分化诱导因子的发育调控

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Previousworkhasshownthatcellsdevelopingathighdensityreleasealow-molecular-weightfactorthatcaninduceisolatedDictyosteliumdiscoideumamoebaeofstrainV12M2todifferentiateintostalkcellsinthepresenceofcyclicAMP.Wenowshowthatthisdifferentiation-inducingfactor,calledDIF,canbeextractedfromcellsduringnormaldevelopmentandthatitsproductionisstronglydevelopmentallyregulated.DIFisnotdetectableinvegetativecellsbutrisesdramaticallyafteraggregationtoreachapeakduringslugmigration.DIFlevelsareverylowintwomutantsdefectiveinaggregation.ThepostaggregativesynthesisofDIFisstimulatedbytheadditionofextracellularcyclicAMP.WeproposethatDIFisamorphogencontrollingprestalkcelldifferentiation.
机译:Previousworkhasshownthatcellsdevelopingathighdensityreleasealow高分子weightfactorthatcaninduceisolatedDictyosteliumdiscoideumamoebaeofstrainV12M2todifferentiateintostalkcellsinthepresenceofcyclicAMP.Wenowshowthatthisdifferentiation-inducingfactor,calledDIF,canbeextractedfromcellsduringnormaldevelopmentandthatitsproductionisstronglydevelopmentallyregulated.DIFisnotdetectableinvegetativecellsbutrisesdramaticallyafteraggregationtoreachapeakduringslugmigration.DIFlevelsareverylowintwomutantsdefectiveinaggregation.ThepostaggregativesynthesisofDIFisstimulatedbytheadditionofextracellularcyclicAMP.WeproposethatDIFisamorphogencontrollingprestalkcelldifferentiation。

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