Table 1.
Classes of PHA synthases and varieties of P (3HA)s (adapted from Rehm 2007) [10].
| Substrate specificity | Class of PHA synthase | Subunit(s) (PHA synthase subunit) |
Microorganism | Polymers produceda |
|---|---|---|---|---|
| SCL-3HA-CoA (C3–C5) | I | PhaC | Ralstonia eutropha | P (3HB), P (3HB-co-3HV) |
| III | PhaC, PhaE | Allochromatium | ||
| IV | PhaC,PhaR |
vinosum
Bacillus megaterium |
||
|
| ||||
| MCL-3HA-CoA (C6–C14) | II | PhaC | Pseudomonas | P (3HA) |
| oleovorans | ||||
| Pseudomonas putida | ||||
| Pseudomonas aeruginosa | ||||
|
| ||||
| SCL-MCL- | I | PhaC | Aeromonas caviae | P (3HB-co-3HA) |
| P (3HA)-CoA (C3–C14) | II | PhaC | FA440 | |
| Pseudomonas sp.61-3 | ||||
aP (3HB), poly-3-hydroxybutyrate, P (3HB-co-3HV), poly-3-hydroxybutyrate-co-3-hydroxyvalerate, P (3HA), poly-3-hydroxyalkanoate, P (3HB-co-3HA), poly-3-hydroxybutyrate-co-3-hydroxyalkanoate.