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Probing Molecular and Surface Interactions of Mussel Adhesive Proteins by Using Surface Forces Apparatus  
Probing Molecular and Surface Interactions of Mussel Adhesive Proteins by Using Surface Forces Apparatus
資料類型: PDF文件
關(guān)鍵詞: Molecular  interactions  Surface  forces  apparatus  Mussel  adhesive  
proteins  
資料大小: 77K
所屬學(xué)科: 通用高分子材料
來源: 來源網(wǎng)絡(luò)
簡(jiǎn)介:
Musselssurviveinturbulentseabyrobustunderwateradhesiontoallkindsofwaveandwind-sweptsubstrata,aswellashighlystiffandhighlyextensiblesurfacecoatingsusingaproteinaceousbyssus.Suchremarkablefeaturesmakethebyssusasourceofinspirationforthedevelopmentofnoveladhesives,coatingsandbiomaterialswhichcanbeintroducedinasimilarlyturbulentaqueousenwronmentinthehumanbody.Themusselbyssusresemblesabundleofthreadstippedwithadhesiveplaquesandcontainsroughly25-30differentproteins.Understandingtheadhesionandcohesionmechanismoftheseproteinsisofbothfundamentalandpracticalimportanceinthedevelopmentofbiomedicaladhesivesandcoatings.Ourgrouphasendeavoredtoinvestigatethemolecularandsurfaceinteractionmechanismsofmusseladhesiveproteinsbyapplyingamolecularforceprobetechnique-SurfaceForcesApparatus(SFA).TheSFAstudieswereperformedinvariousconfigurations:(i)aproteinfilmagainstdifferentsubstrata,(ii)aproteinfilmagainstanothersurfaceofthesameordifferentprotein,and(iii)proteinsolutionsconfinedbetweendifferentsubstrata.Itwasfoundthattheadhesionandcohesionofmusselfootproteinsarecriticallyrelatedtothemodifiedprominentaminoacid,L-3,4-dihydroxyphenylalanine(DOPA)orC2_mannosyl_7_hydroxytryptophan(Man70HTrp).Formusseladhesiontovarioussubstrata,DOPAplaystheimportantroleviadiverseinteractionsincludinghydrogenbonding,metalcoordination,cation-7rinteractions.DOPA-richproteinsmfp-3andmfp-5playamajorroleintheadhesionatplaque-substratainterfaces.DOPAalsocontributessignificantlytotheproteincohesionviametalcoordination(e.g.,DOPA_Ca2+,DOPA_Fe3+),cation-7rinteractions(e.g.,DOPA-Lys+).Ourresultsprovidenewinsightsintothedevelopmentofbiomimeticunderwateradhesivesandcoatingsforbiomedicalapplications.
上傳人: liu
上傳時(shí)間: 2013-06-25 11:34:36
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