Acyl-acyl carrier protein synthetases from bluegreen algae and plants

TL;DRAbstract

All metabolic processes involving fatty acids are preceded by the activation of the fatty acid to form a thioester derivative. Activation by acyl-CoA synthetase is well established whereas only little information is available about the alternative way utilizing acyl carrier protein (ACP) as acceptor of the acyl group. The focus of this work was to investigate acyl-ACP synthetase (AAS) activity in cyanobacteria and plants, two groups of photosynthetic organisms.In a previous study of our group cyanobacterial AAS was identified and functionally characterized by heterologous expression in Escherichia coli. However, the biological role of this activity within the cell was not determined. Two homologous sequences, AAE15 and AAE16 were found in Arabidopsis. Both of them were investigated by Koo et al. (2005) with respect to their role in the elongation of exogenous fatty acids in chloroplasts, but only for AAE15 the AAS activity was proposed.To elucidate the biological role of AAS activity i

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