There are numerous reports and significant information available
about photosynthesis, RuBisCO, PEPc and other carboxylases, as well
as carbon concentration mechanisms in cyanobacteria. However, only
very little has been done to engineer cyanobacteria in order to increase
carbon fixation using other enzymes than RuBisCO. One promising
strategy may be to introduce syntheticMOG pathwayswith theoretically
increased efficiency in the carbon fixation process. Recent data have
demonstrated an increased PEPc protein level by overexpression pepc
encoding PEPc [84] with some positive effects on carbon fixation and
photosynthesis. Further studies are needed to clarify the effects on carbon
fixation, cell growth and photosynthesis in these engineered
cyanobacterial cells.