Biochemical cooperation between Klebsiella oxytoca Sc and Methylobacterium mesophilium Sr for complete degradation of dimethyl isophthalate

TY - JOUR

T1 - Biochemical cooperation between Klebsiella oxytoca Sc and Methylobacterium mesophilium Sr for complete degradation of dimethyl isophthalate

AU - Li, Jiaxi

AU - Gu, Ji Dong

N1 - Funding Information: This project was supported by the Chinese Academy of Sciences and additional financial support was by a knowledge innovation project of SCSIO (No. LYQY200306) and an 863 project (No. 2002AA601160).

PY - 2006/12

Y1 - 2006/12

N2 - Klebsiella oxytoca Sc and Methylobacterium mesophilicum Sr were isolated from enrichment cultures using dimethyl isophthalate (DMI) as the sole carbon and energy source and mangrove sediment as an inoculum. Complete degradation of DMI required both species of bacteria at different biochemical transformation steps. The biochemical degradation pathway was DMI to monomethyl isophthalate (MMI) by K. oxytoca Sc, MMI to isophthalate (IPA) by M. mesophilium Sr, and IPA by both K. oxytoca Sc and M. mesophilium Sr sequentially. The consortium comprising of K. oxytoca Sc and M. mesophilicum Sr was effective in complete degradation of DMI in eight days. Our results suggest that a consortium of microorganisms indigenous to the mangrove environment is responsible for mineralization of environmental pollutant DMI through biochemical cooperation.

AB - Klebsiella oxytoca Sc and Methylobacterium mesophilicum Sr were isolated from enrichment cultures using dimethyl isophthalate (DMI) as the sole carbon and energy source and mangrove sediment as an inoculum. Complete degradation of DMI required both species of bacteria at different biochemical transformation steps. The biochemical degradation pathway was DMI to monomethyl isophthalate (MMI) by K. oxytoca Sc, MMI to isophthalate (IPA) by M. mesophilium Sr, and IPA by both K. oxytoca Sc and M. mesophilium Sr sequentially. The consortium comprising of K. oxytoca Sc and M. mesophilicum Sr was effective in complete degradation of DMI in eight days. Our results suggest that a consortium of microorganisms indigenous to the mangrove environment is responsible for mineralization of environmental pollutant DMI through biochemical cooperation.

KW - Biochemical cooperation

KW - Biodegradation

KW - Dimethyl isophthalate

KW - Isophthalic acid

KW - Mono-methyl isophthalate

KW - Plasticizers

UR - http://www.scopus.com/inward/record.url?scp=33845940928&partnerID=8YFLogxK

U2 - 10.1007/s11267-006-9041-6

DO - 10.1007/s11267-006-9041-6

M3 - 文章

AN - SCOPUS:33845940928

SN - 1567-7230

VL - 6

SP - 569

EP - 574

JO - Water, Air, and Soil Pollution: Focus

JF - Water, Air, and Soil Pollution: Focus

IS - 5-6

ER -