作者: Zhong Huang , Vyacheslav M. Andrianov , Yu Han , Stephen H. Howell
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摘要: Gene I of cauliflower mosaic virus (CaMV) encodes a protein that is required for movement. The CaMV movement (MP) was used in yeast 2-hybrid system to screen an Arabidopsis cDNA library cDNAs encoding MP-interacting (MPI) proteins. Three different clones were found proteins (MPI1, -2 and -7) interact with the N-terminal third MP. interaction between MPI7 MP mutants correlated infectivity mutants. A non-infectious mutant, ER2A, two amino acid changes failed MPI7, while infectious second-site differed from ER2A by only single change, interacted system. encoded member large, but diverse gene family Arabidopsis. related sequence, size hydropathy profile mammalian (such as rat PRA1) described rab acceptor. expressed widely plants, transgenic plants MPI7:GFP fusion localized cytoplasm, concentrated punctate spots. In protoplasts transfected CFP:MP MPI7:YFP, colocalized some sites where MPI7:YFP expressed. At these sites, fluorescence resonance energy transfer (FRET) fluorophores observed indicating planta MPI7.