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Purification and Characterization of Two Muconate Cycloisomerase Isozymes from Aniline-assimilatingFrateuriaSpecies ANA-18
Author(s) -
Shuichiro Murakami,
Jon Y. Takemoto,
Atsushi Takashima,
Ryu Shinke,
Kenji Aoki
Publication year - 1998
Publication title -
bioscience biotechnology and biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.509
H-Index - 116
eISSN - 1347-6947
pISSN - 0916-8451
DOI - 10.1271/bbb.62.1129
Subject(s) - thermostability , isozyme , biochemistry , chemistry , aniline , enzyme , molecular mass , catechol , amino acid , stereochemistry , biology , organic chemistry
Two muconate cycloisomerases (MC I and MC II, EC 5.5.1.1) were purified to homogeneity from an aniline-grown Frateuria sp. ANA-18. MC I and MC II were similar in molecular mass, optimal pH, and pH stability but different in thermostability, and some other enzymatic properties. NH2-terminal amino acid sequences were different between the two isozymes, indicated that these are encoded by different genes. Different inducible production of MC I and MC II suggested that two catechol branches involved in the beta-ketoadipate pathway function in Frateuria sp. ANA-18.

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