Table 4 Advanced biofuels: alkanes, alkenes and ketones using fatty acid intermediates
From: Biosynthesis pathways of expanding carbon chains for producing advanced biofuels
Advanced biofuels | Producing strain | Key gene from heterologous hosts | Biosynthetic pathways | Key intermediates | |
|---|---|---|---|---|---|
Alkanes and alkenes (C13–C17)heptadecane, heptadecene, tridecane,pentadecene,pentadecane,heptadecene,pentadecane, heptadecane | ADO,AAR | Synechococcus sp. PCC7002 | AAR-ADO | Fatty aldehyde | |
Linear alkanes, such as pentadecane,heptadecene,branched tridecane, heptadecane, hexadecane, hexadecane, pentadecane, pentadecene, tridecane, tridecene, undecane | E. coli [184], Synechococcus sp. PCC 7002 [185] and cyanobacterium Lyngbya majuscula [186] | CAR/Sfp FAR;luxC, luxE, and luxD | Mycobacterium marinum and Bacillus subtilis,Photorhabdus luminescens | CAR/FAR-ADO | Fatty acid |
α-Olefin (C16–C20) 1,10-heptadecadiene and 1-pentadecene | Jeotgalicoccus sp. ATCC 8456 [187] | OleTJE | Jeotgalicoccus sp. ATCC 8456 | OLeTJE | Acyl-CoA |
Olefin | Micrococcus luteus [76] | OleABCD | Micrococcus | HEAD-TO-HEAD | Acyl-CoA |
1-Nonadecene,1,14-nonadecadiene | cyanobacterium Lyngbya majuscula [188] | ols gene | Synechococcus sp. PCC 7002 and cyanobacterium Lyngbya majuscula | OLS pathway | Acyl-CoA |
Isooctane | Streptomyces albus [84] | type I polyketide synthase | Synechococcus sp. PCC 7002 | Polyketone synthesis pathway | Acyl-CoA |