Production of 3-hydroxypropionic acid from acrylic acid by newly isolated rhodococcus erythropolis LG12.
A novel microorganism, designated as LG12, was isolated from soil based on its ability to use acrylic acid as the sole carbon source. An electron microscopic analysis of its morphological characteristics and phylogenetic classification by 16S rRNA homology showed that the LG12 strain belongs to Rhodococcus erythropolis. R. erythropolis LG12 was able to metabolize a high concentration of acrylic acid (up to 40 g/l). In addition, R. erythropolis LG12 exhibited the highest acrylic acid-degrading activity among the tested microorganisms, including R. rhodochrous, R. equi, R. rubber, Candida rugosa, and Bacillus cereus. The effect of the culture conditions of R. erythropolis LG12 on the production of 3-hydroxypropionic acid (3HP) from acrylic acid was also examined. To enhance the production of 3HP, acrylic acid-assimilating activity was induced by adding 1 mM acrylic acid to the culture medium when the cell density reached an OD600 of 5. Further cultivation of R. erythropolis LG12 with 40 g/l of acrylic acid resulted in the production of 17.5 g/l of 3HP with a molar conversion yield of 44% and productivity of 0.22 g/I/h at 30 degrees after 72 h.
Lee
Sang-Hyun
SH
Corporate R&D, LG Chem Research Park, 104-1 Moonji-dong, Yuseong-gu, Daejeon 305-380, Korea.
Park
Si Jae
SJ
Park
Oh-Jin
OJ
Cho
Junhyeong
J
Rhee
Joo Won
JW
D000179:Acrylates / Q000378:metabolism* / Q000494:pharmacology; D003470:Culture Media / Q000737:chemistry; D004269:DNA, Bacterial / Q000032:analysis / Q000235:genetics; D019344:Lactic Acid / Q000031:analogs & derivatives* / Q000096:biosynthesis; D053858:Metabolic Networks and Pathways / Q000187:drug effects; D008855:Microscopy, Electron, Scanning; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000032:analysis / Q000235:genetics; D012240:Rhodococcus / Q000187:drug effects / Q000302:isolation & purification* / Q000502:physiology* / Q000648:ultrastructure; D012988:Soil Microbiology
D000179:Acrylates; D003470:Culture Media; D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S; D019344:Lactic Acid; C031601:hydracrylic acid; C036658:acrylic acid