[推荐下载]2017最新科学英文演讲稿范文

【推荐下载】2017最新科学英文演讲稿范文

Secretidentitiesaren’

tjustforsuperheroesanymore.Researchershavefoundthataproteinpresentineverythingfromamoebastopeopleislivingadoublelife.OnceitbindstoDNA,theprotein,calledRfaH,ripsapart—andthenrefoldsintoadifferentshape,todoadifferentjob.

RfaHisatranscriptionprotein—attachedtoorfreedfromastretchofDNA,itdeterminesifageneisexpressedornot.Butoncetheproteinhascarriedoutitstask,itshelicalstructureunravels.Withinseconds,itrefoldsintoabarrelstructure,whichhasanewrole,thistimeintranslation,whereithelpsthecellproduceaminoacidsfornewproteins.ThestudyisinthejournalCell.

[BjrnM.Burmannetal,AnαHelixtoβBarrelDomainSwitchTransformstheTranscriptionFactorRfaHintoaTranslationFactor]

Thenextstepistofindoutifthebarrelcanrefoldintothehelix.Afterthat,researcherswanttoseeifproteinssimilartoRfaH—whicharepresentinalllifeonEarth—arecapableofcomparablemolecularcontortion.Whichwouldmeanalotmorebangforourproteinbuck. —IanChant