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Three dnaK and four dnaJ genes have been identified in the genome of cyanobacterium Synechococcus elongatus PCC 7942. Our comprehensive analysis of yeast two-hybrid screening revealed a specific interaction among DnaK2, DnaJ2, and RNase E, an essential endoribonuclease. We examined the effects of DnaK2 and DnaJ2 on RNase E activity by monitoring the digestion of psbAII transcript in vitro. The addition of DnaK2 and DnaJ2 obviously inhibited RNase E activity in an ATPdependent manner. Thesedoi:10.1271/bbb.60647 pmid:17213638 fatcat:uuj5nvo2krgt3opnprnqfam3me