预览加载中，请您耐心等待几秒...

拟南芥VILLIN蛋白调控气孔运动的机制研究.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

拟南芥VILLIN蛋白调控气孔运动的机制研究 Title:MechanismsunderlyingtheregulationofstomatalmovementsbyArabidopsisVILLINprotein Abstract: Stomatalmovementsplayacriticalroleinplantadaptationtovariousenvironmentalconditions.Arabidopsisthalianahasbeenextensivelyusedasamodelsystemtostudystomatalregulationduetoitswell-characterizedgeneticsandmoleculartools.VILLIN,acalcium-regulatedactin-bindingprotein,hasemergedasakeyregulatorofstomatalmovements.ThisreviewaimstoexplorethemechanismsbywhichVILLINinfluencesstomatalregulationinArabidopsis. Introduction: Stomata,smallepidermalporesfoundintheaerialpartsofplants,playacrucialroleinregulatinggasexchangeandwaterloss.Theopeningandclosingofstomataaretightlycontrolledtooptimizethebalancebetweenphotosynthesisandtranspiration.Althoughseveralsignalingpathwayshavebeenidentifiedinstomatalregulation,themolecularmechanismsinvolvedinstomatalmovementsarestillnotfullyunderstood.Recentstudieshavehighlightedtheinvolvementoftheactincytoskeletoninthisprocess,withparticularemphasisontheroleofVILLINprotein. VILLINanditsroleinstomatalmovements: VILLIN,awidelyconservedactin-bindingprotein,isexpressedinvariousplanttissues,includingguardcells.StudieshavedemonstratedthatVILLINplaysacrucialroleinstomatalmovementsbymodulatingactindynamics.IthasbeenshownthatVILLINpromotesactinfilamentbundlingandpolymerization,whichareessentialfortheclosureofstomata.Loss-of-functionmutantsofVILLINdisplayimpairedstomatalclosure,emphasizingtheimportanceofthisproteinintheregulationofstomatalmovements. Calcium-mediatedregulationofVILLIN: Calciumsignalingplaysacrucialroleinmultiplephysiologicalprocessesinplants,includingstomatalregulation.VILLINisacalcium-regulatedprotein,andchangesincytosoliccalciumlevelsregulateitsactivationandfunction.StudieshavedemonstratedthatVILLINbindscalciumionsandundergoesconformationalchanges,leadingtoitsactivation.Calcium-dependentactivationofVILLINpromotesactinbundlingandpolymerization,contributingtostomatalclosure. Interactionswithotherproteins: VILLINinteractswithvario