Nakazawa T, Hayashi E
J Bacteriol. 1977 Jul;131(1):42-8. doi: 10.1128/jb.131.1.42-48.1977.
A mutant strain of Pseudomonas testosteroni blocked in phthalate catabolism converted phthalate into 4,5-dihydroxyphthalate. The latter compound was isolated, and its physical properties were determined. A stoichiometric conversion of the compound to protocatechuate was demonstrated spectrophotometrically with crude extracts of a protocatechuate 4,5-dioxygenase-deficient mutant. Therefore, phthalate is metabolized through 4,5-dihydroxyphthalate and protocatechuate, which is further degraded by protocatechuate 4,5-dioxygenase in P. testosteroni. By using several mutants blocked in phthalate catabolism, 4,5-dihydroxyphthalate decarboxylase was shown to be induced by phthalate. A simple spectrophotometric assay for the enzyme is also reported.
一株在邻苯二甲酸酯分解代谢中受阻的睾丸酮假单胞菌突变株将邻苯二甲酸酯转化为4,5 - 二羟基邻苯二甲酸酯。分离出了后一种化合物,并测定了其物理性质。用原儿茶酸4,5 - 双加氧酶缺陷型突变株的粗提取物通过分光光度法证明了该化合物向原儿茶酸的化学计量转化。因此,邻苯二甲酸酯通过4,5 - 二羟基邻苯二甲酸酯和原儿茶酸进行代谢,原儿茶酸在睾丸酮假单胞菌中进一步被原儿茶酸4,5 - 双加氧酶降解。通过使用几种在邻苯二甲酸酯分解代谢中受阻的突变株,表明4,5 - 二羟基邻苯二甲酸酯脱羧酶是由邻苯二甲酸酯诱导产生的。还报道了一种针对该酶的简单分光光度测定法。