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COOR
COOH
COOR
COOR
COOH
COOH
(I)
(II)
(III)
COOH
COOH
COOH
OH
(IV)
OH
OH
(V)
(VI)
OH
OH
(VII)
O
(VIII)
Acetyl CoA + succinate
FIGURE 15.7
The.pathway.of. meta -phthalate.diester.biodegradation.by. Rhodococcus .spp..(I). meta -phthalate.
diester;. (II). meta -phthalate. monoester;. (III). isophthalic. acid;. (IV). benzoic. acid;. (V). para -
hydroxybenzoic. acid;. (VI). protocatechuate;. (VII). pyrocatechol;. and. (VIII). 3-ketoadipic. acid..
(From.Aleshchenkova,.Z.M..et.al.,. Microbiology ,.66(5),.515,.1997.)
of. acid. into. 4-hydrogen-3,4-dihydroxyisophthalate. also. resulted. in. the.
nonenzymatic. degradation. to. form. 3-hydroxybenzoic. acid.. Rhodococcus ,.
including. R. ruber . and. R. erythropolis ,. were. found. to. be. able. to. degrade.
DMIP. (Aleshchenkova. et. al.. 1997). (Figure. 15.7),. but. their. degradation.
pathways. including. the. two. parts. were. quite. different. from. what. was.
described. earlier.. In. one. of. the. pathways,. the. strain. was. decarboxylated.
from. IA. to. benzoic. acid,. instead. of. being. oxidized. to. protocatechuate.
directly..The.benzoic.acid.was.transformed.to.4-hydroxybenzoic.acid.and.
then. to. protocatechuate.. For. another. part,. benzoic. acid. was. irst. trans-
formed. to. pyrocatechol. and. found. to. go. through. further. degradation. in.
the.process.
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