Gene encoding a putative zinc finger protein in Synechocystis PCC6803.

A 5.5-kb HindIII fragment of Synechocystis PCC6803 containing a liverwort (ORF316) homolog encoding a putative zinc finger protein was cloned. Nucleotide sequence analysis showed that the homology of the amino acid sequence deduced from the ORF326 of Synechocystis PCC6803 with the counterparts of a liverwort and tobacco was 50% and 46%, respectively. Synechocystis ORF326 also showed 38% homology with the dedB gene in Escherichia coli. The gene organization of the region in these species of organisms was quite different. This suggests that the Synechocystis ORF326 and liverwort ORF316 genes may be related to a common regulatory gene, but not photosynthetic gene characteristic to chloroplasts.