start-ver=1.4 cd-journal=joma no-vol=95 cd-vols= no-issue=3 article-no= start-page=119 end-page=131 dt-received= dt-revised= dt-accepted= dt-pub-year=2020 dt-pub=20200601 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Ribosome rescue activity of an Arabidopsis thaliana ArfB homolog en-subtitle= kn-subtitle= en-abstract= kn-abstract=A homolog of the bacterial ribosome rescue factor ArfB was identified in Arabidopsis thaliana. The factor, named AtArfB for Arabidopsis thaliana ArfB, showed ribosome rescue activity in both in vivo and in vitro assays based on the bacterial translation system. As has been shown for ArfB, the ribosome rescue activity of AtArfB was dependent on the GGQ motif, the crucial motif for the function of class I release factors and ArfB. The C-terminal region of AtArfB was also important for its function. The N-terminal region of AtArfB, which is absent in bacterial ArfB, functioned as a transit peptide for chloroplast targeting in tobacco cells. These results strongly suggest that AtArfB is a ribosome rescue factor that functions in chloroplasts. en-copyright= kn-copyright= en-aut-name=NagaoMichiaki en-aut-sei=Nagao en-aut-mei=Michiaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TsuchiyaFumina en-aut-sei=Tsuchiya en-aut-mei=Fumina kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=MotohashiReiko en-aut-sei=Motohashi en-aut-mei=Reiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=AboTatsuhiko en-aut-sei=Abo en-aut-mei=Tatsuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil=Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=2 en-affil=Graduate School of Integrated Science and Technology, Shizuoka University kn-affil= affil-num=3 en-affil=Graduate School of Integrated Science and Technology, Shizuoka University kn-affil= affil-num=4 en-affil=Graduate School of Natural Science and Technology, Okayama University kn-affil= en-keyword=Arabidopsis thaliana kn-keyword=Arabidopsis thaliana en-keyword=ArfB kn-keyword=ArfB en-keyword=chloroplast kn-keyword=chloroplast en-keyword=ribosome rescue kn-keyword=ribosome rescue en-keyword=translation kn-keyword=translation END