Fig. 1

Overview of the production of lipids and free fatty acid (FFA), and FFA secretion into the growth medium in the cyanobacterium Synechocystis sp. PCC 6803 (modified from [9, 36]). Abbreviations of genes: accDACB, a multisubunit acetyl-CoA carboxylase gene; aas, acyl-ACP synthetase; glgA, glycogen synthase; glgC, ADP-glucose pyrophosphorylase; glgP, glycogen phosphorylase; glgX, glycogen isoamylase; glpD, glycerol-3-phosphate dehydrogenase; lipA, a lipolytic enzyme-encoding gene; phaA, β-ketothiolase; phaB, acetoacetyl-CoA reductase; phaEC, the heterodimeric PHB synthase; plsX and plsC, putative phosphate acyl-transferases; RuBisCO, the RuBisCO gene cluster including rbcLSX, encoding RuBisCo large, small and chaperone subunits, respectively; sll1951, the surface (S) layer protein. Abbreviations of intermediates: DHAP, dihydroxyacetone phosphate; FASII, fatty acid synthesis type II; fatty acyl-ACP, fatty acyl–acyl carrier protein; FFAs, free fatty acids; G1P, glucose 1-phosphate; G6P, glucose 6-phosphate; Gro3P, glycerol-3-phosphate; 3PG, 3-phosphoglycerate; PHB, polyhydroxybutyrate; RuBP, ribulose-1,5-bisphosphate; TCA cycle, Tricarboxylic acid cycle