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Identification of Two Homologous Genes, chlAI and chlAII, That Are Differentially Involved in Isocyclic Ring Formation of Chlorophyll a in the Cyanobacterium Synechocystis sp. PCC 6803*
TLDR
Findings suggested that Chl AI is the sole MPE cyclase system under aerobic conditions and that the induced ChlAII operates together with ChlAI under micro-oxic conditions. Expand
Functional differentiation of two analogous coproporphyrinogen III oxidases for heme and chlorophyll biosynthesis pathways in the cyanobacterium Synechocystis sp. PCC 6803.
TLDR
Results suggested that sll1185 encodes HemF as the sole CPO under aerobic conditions and sll1876 encode HemN operating under micro-oxic conditions, together with HemF, which would ensure the stable supply of tetrapyrrole pigments under environments where oxygen levels fluctuate greatly. Expand
A heme oxygenase isoform is essential for aerobic growth in the cyanobacterium Synechocystis sp. PCC 6803: modes of differential operation of two isoforms/enzymes to adapt to low oxygen environments
TLDR
The differential operation of two isoforms/enzymes in cyanobacterial tetrapyrrole biosynthesis to adapt to low oxygen environments is discussed, suggesting that HO2 operates as a dominant HO under high light and micro-oxic environments and acts as an accessory HO at low light intensity. Expand
Chlorophyll a Biosynthesis Under Anaerobic Environments in the Cyanobacterium Synechocystis sp. PCC 6803
The isocyclic ring (E-ring) with 131-oxo group is a common structural feature of all chlorophylls. The E-ring is formed by two structurally unrelated enzymes. One is the oxygen-dependent (AcsF)Expand