简介:Thereareabout17chromosomesinyeastSaccharomycescerevisiae.Amiddlesizedchromosome,chromosomeV,waschoseninthisworkforstudyingandconstructingthephysi-calmaps.ChromosomeVfromstrainA364awasisolatedbypulsed-fieldgradientgelelectrophoresis(PFGE).GelslicescontainingchromosomeVDNAweredigestedwithtworarecuttingenzymes,NotⅠandSfiⅠ,andthree6-Ntrecognizingenzymes,SmaⅠ,SstⅡandApaⅠ.Severalstrategies-partialorcompletedigestions,digestionwithdifferentsetsoftwoenzymes,andhybrid-izationwithclonedgeneticallymappedprobes(CAN1,URA3,CEN5,PRO3,CHO1,SUP19,RAD51,RAD3)——wereusedtoaligntherestrictionfragments.Thereare9,9,15,17,and20sitesforNotⅠ,SfiⅠ,SmaⅠ,SstⅡandApaⅠrespectivelyinthemapoftheA364achromosomeV.Itstotallengthwascalculatedtobe620Kb(Kilo-bases).Thedistributionsofthecuttingsitesforthesefiveenzymesthroughthewholechromosomearenotuniform.Acomp-arisonbetweenthephysicalmapandthegeneticmapwasalsomade.
简介:Heme(铁protoporphyrinIX)是为众多的生活有机体的一个必要分子。不仅它在酶担任一个修复术的组,它也充当控制从信号transduction到蛋白质建筑群汇编的多样的分子、细胞的进程的一个发信号的分子。缺乏他我合成或功能影响造血,肝并且在人的神经系统。最近的研究包括Hap1揭示了一系列调整heme的抄写因素和信号变换器,调停的一个激活heme的抄写因素在酵母Saccharomycescerevisiae的基因抄写上的氧的效果;Bach1,否定地被调整由的一个transcriptional抑压者他我在哺乳动物的房间;IRR,一个熨斗调停的规章的蛋白质铁家属规定他我在细菌Bradyrhizobium的合成日本嗯;并且调整heme的禁止者,协调蛋白质合成与的eucaryotic开始因素2alphakinase他我在网状细胞的可获得性。在这评论,我们总结的当前的知识他我控制这些transcriptional管理者的活动并且表明变换器,并且讨论与有缺陷者联系的疾病他我合成,降级和函数。房间研究(2006)16:681-692。做i:10.1038/sj.cr.7310086;出版联机2006年8月8日。
简介:MembersofBcl-2familyofproteinsareregulatorsofcelldeaththatcanbegroupedintosubfamiliesofprosurvivalandproapoptoticmolecules.Theyarecharacterizedbythepresenceofseveralconservedmotifs,knownastheBcl-2homology(BH)domains,designatedBH1,BH2,BH3andBH4.MutagenesisandstructuralstudiesrevealedthattheBHdomainsareimportantfunctionaldomainsthatarealsorequiredfordimerizationfunction.Recently,asubfamilyofproapoptoticmoleculesonlycontainsBH3motifhasbeenidentifiedsuggestingBH3domainalonemaybesufficientformediatingproapoptoticfunctionamong