Differential requirement of two homologous proteins encoded by sll1214 and sll1874 for the reaction of Mg protoporphyrin monomethylester oxidative cyclase under aerobic and micro-oxic growth conditions.

Abstract excerpt

The two open reading frames in the Synechocystis sp. PCC 6803 genome, sll1214 and sll1874, here designated cycI and cycII, respectively, encode similar proteins, which are involved in the Mg protoporphyrin monomethylester (MgProtoME) cyclase reaction. The impairment of tetrapyrrole biosynthesis was examined by separate inactivation of both cyclase encoding genes followed by analysis of chlorophyll contents,...

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